Problem in Writing to/Reading from a Binary file placed in a Loop
Hi
As you can see in the attahced image, I attempt to write a set of 2*202 data in each iteration of the loop of the loop, yet when I try to read the data (in the second picture) I only get the first (or last, I assume) set of data, up to index 202. I needed to read two set (X, Y) of 402 valuse. So, I am not sure if I am making a mistake in wrting to the file or reading from it!
I really appreciate it if someone could suggest a solution
Ashakn
You are only reading the first. In your read, set your number to read to -1. That will tell the Read Binary File to read all of the data instead just a single set.
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Problem with ArrayLists and writing and reading from a .dat file (I think)
I'm brand new to this forum, but I'm sure hoping someone can help me with a problem I'm having with ArrayLists. This program was originally created with an array of objects that were displayed on a GUI with jtextFields, then cycling thru them via jButtons: First, Next, Previous, Last. Now I need to add the ability to modify, delete and add records. Both iterations of this program needed to write to and read from a .dat file.
It worked just like it was suppose to when I used just the array, but now I need to use a "dynamic array" that will grow or shrink as needed: i.e. an ArrayList.
When I aded the ArrayList I had the ArrayList use toArray() to fill my original array so I could continue to use all the methods I'd created for using with my array. Now I'm getting a nullPointerException every time I try to run my program, which means somewhere I'm NOT filling my array ???? But, I'm writing just fine to my .dat file, which is confusing me to no end!
It's a long program, and I apologize for the length, but here it is. There are also 2 class files, a parent and 1 child below Inventory6. This was written in NetBeans IDE 5.5.1.
Thank you in advance for any help anyone can give me!
LabyBC
package my.Inventory6;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.DecimalFormat;
import javax.swing.JOptionPane;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
import java.io.*;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.lang.IllegalStateException;
import java.util.NoSuchElementException;
import java.util.ArrayList;
import java.text.NumberFormat;
// Class Inventory6
public class Inventory6 extends javax.swing.JFrame {
private static InventoryPlusColor[] inventory;
private static ArrayList inList;
// create a tool that insure the specified format for a double number, when displayed
private DecimalFormat doubleFormat = new DecimalFormat( "0.00" );
private DecimalFormat singleFormat = new DecimalFormat( "0");
// the index within the array of products of the current displayed product
private int currentProductIndex;
/** Creates new form Inventory6 */
public Inventory6() {
initComponents();
currentProductIndex = 0;
} // end Inventory6()
private static InventoryPlusColor[] getInventory() {
ArrayList<InventoryPlusColor> inList = new ArrayList<InventoryPlusColor>();
inList.add(new InventoryPlusColor(1, "Couch", 3, 1250.00, "Blue"));
inList.add(new InventoryPlusColor(2, "Recliner", 10, 525.00, "Green"));
inList.add(new InventoryPlusColor(3, "Chair", 6, 125.00, "Mahogany"));
inList.add(new InventoryPlusColor(4, "Pedestal Table", 2, 4598.00, "Oak"));
inList.add(new InventoryPlusColor(5, "Sleeper Sofa", 4, 850.00, "Yellow"));
inList.add(new InventoryPlusColor(6, "Rocking Chair", 2, 459.00, "Tweed"));
inList.add(new InventoryPlusColor(7, "Couch", 4, 990.00, "Red"));
inList.add(new InventoryPlusColor(8, "Chair", 12, 54.00, "Pine"));
inList.add(new InventoryPlusColor(9, "Ottoman", 3, 110.00, "Black"));
inList.add(new InventoryPlusColor(10, "Chest of Drawers", 5, 598.00, "White"));
for (int j = 0; j < inList.size(); j++)
System.out.println(inList);
InventoryPlusColor[] inventory = (InventoryPlusColor[]) inList.toArray
(new InventoryPlusColor[inList.size()]);
return inventory;
} // end getInventory() method
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
// <editor-fold defaultstate="collapsed" desc=" Generated Code ">
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
IDNumberLbl = new javax.swing.JLabel();
IDNumberField = new javax.swing.JTextField();
prodNameLbl = new javax.swing.JLabel();
prodNameField = new javax.swing.JTextField();
colorLbl = new javax.swing.JLabel();
colorField = new javax.swing.JTextField();
unitsInStockLbl = new javax.swing.JLabel();
unitsInStockField = new javax.swing.JTextField();
unitPriceLbl = new javax.swing.JLabel();
unitPriceField = new javax.swing.JTextField();
invenValueLbl = new javax.swing.JLabel();
invenValueField = new javax.swing.JTextField();
restockingFeeLbl = new javax.swing.JLabel();
restockingFeeField = new javax.swing.JTextField();
jbtFirst = new javax.swing.JButton();
jbtNext = new javax.swing.JButton();
jbtPrevious = new javax.swing.JButton();
jbtLast = new javax.swing.JButton();
jbtAdd = new javax.swing.JButton();
jbtDelete = new javax.swing.JButton();
jbtModify = new javax.swing.JButton();
jbtSave = new javax.swing.JButton();
jPanel2 = new javax.swing.JPanel();
searchIDNumLbl = new javax.swing.JLabel();
searchIDNumbField = new javax.swing.JTextField();
jbtSearch = new javax.swing.JButton();
searchResults = new javax.swing.JLabel();
jbtExit = new javax.swing.JButton();
jbtExitwoSave = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder(javax.swing.BorderFactory.createEtchedBorder(), "Inventory Program"));
IDNumberLbl.setText("ID Number");
IDNumberField.setEditable(false);
prodNameLbl.setText("Product Name");
prodNameField.setEditable(false);
colorLbl.setText("Product Color");
colorField.setEditable(false);
colorField.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
colorFieldActionPerformed(evt);
unitsInStockLbl.setText("Units In Stock");
unitsInStockField.setEditable(false);
unitPriceLbl.setText("Unit Price $");
unitPriceField.setEditable(false);
invenValueLbl.setText("Inventory Value $");
invenValueField.setEditable(false);
restockingFeeLbl.setText("5% Restocking Fee $");
restockingFeeField.setEditable(false);
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(unitPriceLbl)
.addComponent(unitsInStockLbl)
.addComponent(colorLbl)
.addComponent(prodNameLbl)
.addComponent(IDNumberLbl)
.addComponent(restockingFeeLbl)
.addComponent(invenValueLbl))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(IDNumberField, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 176, Short.MAX_VALUE)
.addComponent(prodNameField, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 176, Short.MAX_VALUE)
.addComponent(colorField, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 176, Short.MAX_VALUE)
.addComponent(unitsInStockField, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 176, Short.MAX_VALUE)
.addComponent(unitPriceField, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 176, Short.MAX_VALUE)
.addComponent(restockingFeeField, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 176, Short.MAX_VALUE)
.addComponent(invenValueField, javax.swing.GroupLayout.DEFAULT_SIZE, 176, Short.MAX_VALUE))
.addContainerGap())
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(IDNumberLbl)
.addComponent(IDNumberField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(prodNameLbl)
.addComponent(prodNameField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(colorField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(colorLbl))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(unitsInStockField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(unitsInStockLbl))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(unitPriceField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(unitPriceLbl))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(restockingFeeField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(restockingFeeLbl))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 10, Short.MAX_VALUE)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(invenValueField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(invenValueLbl))
.addContainerGap())
jbtFirst.setText("First");
jbtFirst.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtFirstActionPerformed(evt);
jbtNext.setText("Next");
jbtNext.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtNextActionPerformed(evt);
jbtPrevious.setText("Previous");
jbtPrevious.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtPreviousActionPerformed(evt);
jbtLast.setText("Last");
jbtLast.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtLastActionPerformed(evt);
jbtAdd.setText("Add");
jbtAdd.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtAddActionPerformed(evt);
jbtDelete.setText("Delete");
jbtModify.setText("Modify");
jbtModify.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtModifyActionPerformed(evt);
jbtSave.setText("Save");
jbtSave.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtSaveActionPerformed(evt);
jPanel2.setBorder(javax.swing.BorderFactory.createTitledBorder(javax.swing.BorderFactory.createEtchedBorder(), "Search by:"));
searchIDNumLbl.setText("Item Number:");
jbtSearch.setText("Search");
searchResults.setFont(new java.awt.Font("Tahoma", 1, 12));
javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
jPanel2.setLayout(jPanel2Layout);
jPanel2Layout.setHorizontalGroup(
jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addContainerGap()
.addComponent(searchIDNumLbl)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addGap(259, 259, 259)
.addComponent(searchResults, javax.swing.GroupLayout.PREFERRED_SIZE, 213, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jbtSearch, javax.swing.GroupLayout.PREFERRED_SIZE, 83, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(searchIDNumbField, javax.swing.GroupLayout.PREFERRED_SIZE, 143, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
jPanel2Layout.setVerticalGroup(
jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(searchIDNumLbl)
.addComponent(searchIDNumbField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addGap(32, 32, 32)
.addComponent(searchResults, javax.swing.GroupLayout.PREFERRED_SIZE, 17, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(jPanel2Layout.createSequentialGroup()
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jbtSearch)))
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
jbtExit.setText("Save and Exit");
jbtExit.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtExitActionPerformed(evt);
jbtExitwoSave.setText("Exit");
jbtExitwoSave.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtExitwoSaveActionPerformed(evt);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, 248, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 44, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
.addComponent(jbtExitwoSave, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jbtExit)))
.addGroup(layout.createSequentialGroup()
.addComponent(jbtFirst)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jbtNext)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jbtPrevious)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jbtLast))
.addGroup(layout.createSequentialGroup()
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGap(12, 12, 12)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jbtAdd)
.addComponent(jbtDelete)
.addComponent(jbtModify)
.addComponent(jbtSave))))
.addContainerGap())
layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {jbtFirst, jbtLast, jbtNext, jbtPrevious});
layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {jbtAdd, jbtDelete, jbtModify, jbtSave});
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(21, 21, 21)
.addComponent(jbtAdd)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jbtDelete)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jbtModify)
.addGap(39, 39, 39)
.addComponent(jbtSave))
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jbtFirst)
.addComponent(jbtNext)
.addComponent(jbtPrevious)
.addComponent(jbtLast))
.addGap(15, 15, 15)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, 80, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGroup(layout.createSequentialGroup()
.addComponent(jbtExit)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jbtExitwoSave)))
.addContainerGap())
pack();
}// </editor-fold>
private void jbtExitwoSaveActionPerformed(java.awt.event.ActionEvent evt) {
System.exit(0);
private void jbtSaveActionPerformed(java.awt.event.ActionEvent evt) {
String prodNameMod, colorMod;
double unitsInStockMod, unitPriceMod;
int idNumMod;
idNumMod = Integer.parseInt(IDNumberField.getText());
prodNameMod = prodNameField.getText();
unitsInStockMod = Double.parseDouble(unitsInStockField.getText());
unitPriceMod = Double.parseDouble(unitPriceField.getText());
colorMod = colorField.getText();
if(currentProductIndex == inventory.length) {
inList.add(new InventoryPlusColor(idNumMod, prodNameMod,
unitsInStockMod, unitPriceMod, colorMod));
InventoryPlusColor[] inventory = (InventoryPlusColor[]) inList.toArray
(new InventoryPlusColor[inList.size()]);
} else {
inventory[currentProductIndex].setIDNumber(idNumMod);
inventory[currentProductIndex].setProdName(prodNameMod);
inventory[currentProductIndex].setUnitsInStock(unitsInStockMod);
inventory[currentProductIndex].setUnitPrice(unitPriceMod);
inventory[currentProductIndex].setColor(colorMod);
displayProduct(inventory[currentProductIndex]);
private static void writeInventory(InventoryPlusColor i,
DataOutputStream out) {
try {
out.writeInt(i.getIDNumber());
out.writeUTF(i.getProdName());
out.writeDouble(i.getUnitsInStock());
out.writeDouble(i.getUnitPrice());
out.writeUTF(i.getColor());
} catch (IOException e) {
JOptionPane.showMessageDialog(null, "I/O Exception writing data",
"", JOptionPane.ERROR_MESSAGE);
System.exit(0);
} //end writeInventory()
private static DataOutputStream openOutputStream(String name) {
DataOutputStream out = null;
try {
File file = new File(name);
out =
new DataOutputStream(
new BufferedOutputStream(
new FileOutputStream(file)));
} catch (IOException e) {
JOptionPane.showMessageDialog(null, "I/O Error", "", JOptionPane.ERROR_MESSAGE);
System.exit(0);
return out;
} // end openOutputStream()
private static void closeFile(DataOutputStream out) {
try {
out.close();
} catch (IOException e) {
JOptionPane.showMessageDialog(null, "I/O Exception closing file",
"", JOptionPane.ERROR_MESSAGE);
System.exit(0);
} // end closeFile()
private static DataInputStream getStream(String name) {
DataInputStream in = null;
try {
File file = new File(name);
in = new DataInputStream(
new BufferedInputStream(
new FileInputStream(file)));
} catch (FileNotFoundException e) {
JOptionPane.showMessageDialog(null, "The file doesn't exist",
"", JOptionPane.ERROR_MESSAGE);
System.exit(0);
} catch (IOException e) {
JOptionPane.showMessageDialog(null, "I/O Error creating file",
"", JOptionPane.ERROR_MESSAGE);
System.exit(0);
return in;
private static void closeInputFile(DataInputStream in) {
try {
in.close();
} catch (IOException e) {
JOptionPane.showMessageDialog(null, "I/O Exception closing file",
"", JOptionPane.ERROR_MESSAGE);
System.exit(0);
} // end closeInputFile()
private double entireInventory() {
// a temporary double variable that the method will return ...
// after each product's inventory is added to it
double entireInventory = 0;
// loop to control number of products
for (int index = 0; index < inventory.length; index++) {
// add each inventory to the entire inventory
entireInventory += inventory[index].setInventoryValue();
} // end loop to control number of products
return entireInventory;
} // end method entireInventory
private void jbtLastActionPerformed(java.awt.event.ActionEvent evt) {
currentProductIndex = inventory.length-1; // move to the last product
// display the information for the last product
displayProduct(inventory[currentProductIndex]);
private void jbtPreviousActionPerformed(java.awt.event.ActionEvent evt) {
if (currentProductIndex != 0) // it's not the first product displayed
currentProductIndex -- ; // move to the previous product (decrement the current index)
} else // the first product is displayed
currentProductIndex = inventory.length-1; // move to the last product
// after the current product index is set, display the information for that product
displayProduct(inventory[currentProductIndex]);
private void jbtNextActionPerformed(java.awt.event.ActionEvent evt) {
if (currentProductIndex != inventory.length-1) // it's not the last product displayed
currentProductIndex ++ ; // move to the next product (increment the current index)
} else // the last product is displayed
currentProductIndex = 0; // move to the first product
// after the current product index is set, display the information for that product
displayProduct(inventory[currentProductIndex]);
private void jbtFirstActionPerformed(java.awt.event.ActionEvent evt) {
currentProductIndex = 0;
// display the information for the first product
displayProduct(inventory[currentProductIndex]);
private void colorFieldActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
private void jbtModifyActionPerformed(java.awt.event.ActionEvent evt) {
prodNameField.setEditable(true);
prodNameField.setFocusable(true);
unitsInStockField.setEditable(true);
unitPriceField.setEditable(true);
private void jbtAddActionPerformed(java.awt.event.ActionEvent evt) {
IDNumberField.setText("");
IDNumberField.setEditable(true);
prodNameField.setText("");
prodNameField.setEditable(true);
colorField.setText("");
colorField.setEditable(true);
unitsInStockField.setText("");
unitsInStockField.setEditable(true);
unitPriceField.setText("");
unitPriceField.setEditable(true);
restockingFeeField.setText("");
invenValueField.setText("");
currentProductIndex = inventory.length;
private void jbtExitActionPerformed(java.awt.event.ActionEvent evt) {
DataOutputStream out = openOutputStream("inventory.dat");
for (InventoryPlusColor i : inventory)
writeInventory(i, out);
closeFile(out);
System.exit(0);
private static InventoryPlusColor readProduct(DataInputStream in) {
int idNum = 0;
String prodName = "";
double inStock = 0.0;
double pricBalusC -- The line that gives me my NullPointerException is when I call the "DisplayProduct()" method. Its a dumb question, but with NetBeans how do I find out which reference could be null? I'm not very familiar with how NetBeans works with finding out how to debug. Any help you can give me would be greatly appreciated.The IDE is com-plete-ly irrelevant. It's all about the source code.
Do you understand anyway when and why a NullPointerException is been thrown? It is a subclass of RuntimeException and those kind of exceptions are very trival and generally indicate an design/logic/thinking fault in your code.
SomeObject someObject = null; // The someObject reference is null.
someObject.doSomething(); // Invoking a reference which is null would throw NPE. -
How to read from a text file one character at a time?
Hello
I wish to read from a text file in a for loop and that on every iteration i read one charachter and proceed to the next one.
can anyone help me?
Lavilava wrote:
I wish to read from a text file in a for loop and that on every iteration i read one charachter and proceed to the next one.
can anyone help me?
Some additional comments:
You really don't want to read any file one character at a time, because it is highly inefficient. More typically, you read the entire file into memory with one operation (or at least a large chunk, if the file is gigantic) and then do the rest of the operations in memory. One easy way to analyze it one byte at a time would be to use "string to byte array" and then autoindex into a FOR loop, for example.
Of course you could also read the file directly as a U8 array instead of a string.
Message Edited by altenbach on 06-10-2008 08:57 AM
LabVIEW Champion . Do more with less code and in less time . -
Problem with writing and reading using serialization
I am having a problem with writing and reading an object that has another object in it. The purpose of the class is to write a order that has multiple items in it. And there will be several orders. This is for an IB project, where one of the requirements is to utilize a hierarchical composite data structure. That is, it is "one that contains more than one element and at least one of the elements is a composite data structure. Examples are, an array or linked list of records, a record that has one field that is another record, or an array". The code is shown below:
The error produced is
java.lang.NullPointerException
at SamsonRubberIndustries.CustomerOrderDetails.createCustOrdDetailsScreen(CustomerOrderDetails.java:150)
at SamsonRubberIndustries.CustomerOrderDetails$1.run(CustomerOrderDetails.java:78)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
public class CustOrdObject implements Serializable {
public int CustID;
public int CustOrderID;
public Object OrderDate;
public InnerCustOrdObject[] innerCustOrdObj;
public float GrandTotal;
public int MaxItems;
public CustOrdObject() {}
public CustOrdObject(InnerCustOrdObject[] innerCustOrdObj,
int CustID, int CustOrderID, Object OrderDate,
float GrandTotal, int innerarrlength, int innerarrpos, int MaxItems) {
this.CustID = CustID;
this.CustOrderID = CustOrderID;
this.OrderDate = OrderDate;
this.GrandTotal = GrandTotal;
this.MaxItems = MaxItems;
this.innerCustOrdObj = new InnerCustOrdObject[MaxItems];
public InnerCustOrdObject[] getInnerCustOrdObj() {
return innerCustOrdObj;
public void setInnerCustOrdObj(InnerCustOrdObject[] innerCustOrdObj) {
this.innerCustOrdObj = innerCustOrdObj;
public int getCustID() {
return CustID;
public void setCustID(int custID) {
CustID = custID;
public int getCustOrderID() {
return CustOrderID;
public void setCustOrderID(int custOrderID) {
CustOrderID = custOrderID;
public Object getOrderDate() {
return OrderDate;
public void setOrderDate(Object orderDate) {
OrderDate = orderDate;
public void setGrandTotal(float grandTotal) {
GrandTotal = grandTotal;
public float getGrandTotal() {
return GrandTotal;
public int getMaxItems() {
return MaxItems;
public void setMaxItems(int maxItems) {
MaxItems = maxItems;
public class InnerCustOrdObject implements Serializable{
public int ItemNumber;
public float UnitPrice;
public int QuantityRequired;
public float TotalPrice;
public InnerCustOrdObject() {}
public InnerCustOrdObject(int ItemNumber, float
UnitPrice, int QuantityRequired, float TotalPrice){
this.ItemNumber = ItemNumber;
this.UnitPrice = UnitPrice;
this.QuantityRequired = QuantityRequired;
this.TotalPrice = TotalPrice;
public int getItemNumber() {
return ItemNumber;
public void setItemNumber(int itemNumber) {
ItemNumber = itemNumber;
public int getQuantityRequired() {
return QuantityRequired;
public void setQuantityRequired(int quantityRequired) {
QuantityRequired = quantityRequired;
public float getTotalPrice() {
return TotalPrice;
public void setTotalPrice(float totalPrice) {
TotalPrice = totalPrice;
public float getUnitPrice() {
return UnitPrice;
public void setUnitPrice(float unitPrice) {
UnitPrice = unitPrice;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.Date;
import javax.swing.*;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;
public class CustomerOrderDetails extends CommonFeatures{
//TODO
private static int MAX_ORDERS = 200;
private static int MAX_ORDERITEMS = 100;
private static int MaxRecord;
private static int CurrentRecord = 1;
private static int currentItem;
private static int MaxItems;
private static boolean FileExists, recFileExists;
private static CustOrdObject[] orderDetails = new CustOrdObject[MAX_ORDERS];
private static InnerCustOrdObject[] innerCustOrdObj = new InnerCustOrdObject[MAX_ORDERITEMS];
private static File OrderDetailsFile = new File("CustOrdDetails.dat");
private static File OrdRecordNumStore = new File("OrdRecordNumStore.txt");
private static PrintWriter writeFile;
private static BufferedReader readFile;
private static ObjectOutputStream objOut;
private static ObjectInputStream objIn;
//Set format for date
SimpleDateFormat simpleDF = new SimpleDateFormat("dd MM yyyy");
//--<BEGINNING>--Declaring Interface Variables------------------------------------------//
private JPanel innertoppanel, innercenterpanel, innerbottompanel, innerrightpanel, innerleftpanel;
private JLabel CustIDLbl, CustOrderIDLbl, OrderedDateLbl, GrandTotLbl, ItemNumberLbl,UnitPriceLbl, QuantityReqLbl, TotPriceLbl;
private JTextField CustIDTxt, CustOrderIDTxt, OrderedDateTxt, GrandTotTxt, ItemNumberTxt, UnitPriceTxt, QuantityReqTxt, TotPriceTxt;
private JButton addrecordbtn, savebtn, externalprevbtn, externalnextbtn, internalprevbtn, internalnextbtn, gotorecordbtn, additemreqbtn;
//--<END>--Declaring Interface Variables------------------------------------------------//
public static void main(String[] args) {
final CustomerOrderDetails COD = new CustomerOrderDetails();
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
COD.createCustOrdDetailsScreen();
} catch (Exception eb) {
eb.printStackTrace();
//--<BEGINNING>--Creating CustomerOrderDetails Screen---------------------------------------//
public JFrame createCustOrdDetailsScreen() {
createDefaultFrame();
mainframe.setSize(800,500);
createContainerPanel();
containerpanel.add(createCustOrdDetailsTitle(), BorderLayout.NORTH);
containerpanel.add(createCustOrdDetailsMainPanel(), BorderLayout.CENTER);
//containerpanel.add(createCustOrdDetailsLeftNavButtons(), BorderLayout.WEST);
//containerpanel.add(createCustOrdDetailsRightNavButtons(), BorderLayout.EAST);
containerpanel.add(createCustOrdDetailsButtons(), BorderLayout.SOUTH);
mainframe.setContentPane(containerpanel);
mainframe.setLocationRelativeTo(null);
mainframe.setVisible(true);
//--<BEGINNING>--Checks to see whether CRecordNumberStore file exists-------------------------------//
if (OrdRecordNumStore.exists() == true) {
recFileExists = true;
}else {
recFileExists = false;
if (recFileExists == true) {
MaxRecord = readRecordNumber();
CurrentRecord = MaxRecord;
//readOrder();
//readInnerOrderRecord(CurrentRecord);
System.out.println("Current Record " +CurrentRecord);
System.out.println("Max Record " +MaxRecord);
}else{
MaxRecord = 1;
writeRecordNumber(MaxRecord);
CustOrderIDTxt.setText(""+MaxRecord);
System.out.println("Current Record " +CurrentRecord);
System.out.println("Max Record " +MaxRecord);
//--<END>--Checks to see whether CRecordNumberStore file exists--------------------------------------//
if(readOrder() != null){
orderDetails = (CustOrdObject[]) readOrder();
innerCustOrdObj = orderDetails[CurrentRecord].getInnerCustOrdObj();
MaxItems = orderDetails[CurrentRecord].getMaxItems();
if(CurrentRecord > 1 && CurrentRecord < MaxRecord){
externalnextbtn.setEnabled(true);
externalprevbtn.setEnabled(true);
if(CurrentRecord >= MaxRecord){
externalnextbtn.setEnabled(false);
getFieldText(CurrentRecord-1);
}else{
orderDetails[CurrentRecord] = new CustOrdObject();
currentItem = 1;
return mainframe;
//--<END>--Creating CustomerOrderDetails Screen---------------------------------------------//
public JPanel createCustOrdDetailsTitle(){
createTitlePanel();
titlepanel.setBackground(TxtfontColor);
label.setText("- Customer Order Details -");
labelpanel.setBackground(TxtfontColor);
label.setForeground(Color.white);
createbuttonpanel();
buttonpanel.setBackground(TxtfontColor) ;
buttonpanel.add(createReturnToMainMenuButton());
titlepanel.add(labelpanel, BorderLayout.WEST);
titlepanel.add(buttonpanel, BorderLayout.EAST);
return titlepanel;
public JPanel createCustOrdDetailsMainPanel(){
createmainpanel();
mainpanel.setBackground(TxtfontColor);
mainpanel.setLayout(new BorderLayout());
mainpanel.setBorder(BorderFactory.createTitledBorder(""));
mainpanel.add(createInnerTopPanel(), BorderLayout.NORTH);
mainpanel.add(createInnerCenterPanel(), BorderLayout.CENTER);
mainpanel.add(createInnerBottomPanel(), BorderLayout.SOUTH);
mainpanel.add(createInnerRightPanel(), BorderLayout.EAST);
mainpanel.add(createInnerLeftPanel(), BorderLayout.WEST);
return mainpanel;
public JPanel createInnerTopPanel(){
innertoppanel = new JPanel(new GridBagLayout());
innertoppanel.setBackground(TxtfontColor);
GridBagConstraints GBC = new GridBagConstraints();
GBC.fill = GridBagConstraints.HORIZONTAL;
//Setting Font Type and Size
Font font = new Font("Arial", Font.BOLD, 11);
CustIDLbl = new JLabel("Customer ID");
CustIDLbl.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
CustIDLbl.setFont(font);
CustIDLbl.setForeground(LblfontColor);
GBC.gridx = 1;
GBC.gridy = 1;
innertoppanel.add(CustIDLbl, GBC);
CustIDTxt = new JTextField(20);
CustIDTxt.setEditable(true);
GBC.gridx = 2;
GBC.gridy = 1;
innertoppanel.add(CustIDTxt, GBC);
GBC.gridx = 3;
GBC.gridy = 1;
innertoppanel.add(Box.createHorizontalStrut(220), GBC);
OrderedDateLbl = new JLabel("Order Date");
OrderedDateLbl.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
OrderedDateLbl.setFont(font);
OrderedDateLbl.setForeground(LblfontColor);
GBC.gridx = 4;
GBC.gridy = 1;
innertoppanel.add(OrderedDateLbl, GBC);
//Get today's date
Date todaydate = new Date();
OrderedDateTxt = new JTextField(simpleDF.format(todaydate), 20);
OrderedDateTxt.setHorizontalAlignment(JTextField.CENTER);
OrderedDateTxt.setEditable(false);
GBC.gridx = 5;
GBC.gridy = 1;
innertoppanel.add(OrderedDateTxt, GBC);
CustOrderIDLbl = new JLabel("Customer Order ID");
CustOrderIDLbl.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
CustOrderIDLbl.setFont(font);
CustOrderIDLbl.setForeground(LblfontColor);
GBC.gridx = 1;
GBC.gridy = 2;
innertoppanel.add(CustOrderIDLbl, GBC);
CustOrderIDTxt = new JTextField(20);
CustOrderIDTxt.setEditable(false);
GBC.gridx = 2;
GBC.gridy = 2;
innertoppanel.add(CustOrderIDTxt, GBC);
return innertoppanel;
public JPanel createInnerCenterPanel(){
innercenterpanel = new JPanel(new GridBagLayout());
innercenterpanel.setBackground(TxtfontColor);
innercenterpanel.setBorder(BorderFactory.createLoweredBevelBorder());
GridBagConstraints GBC = new GridBagConstraints();
GBC.fill = GridBagConstraints.HORIZONTAL;
//Setting Font Type and Size
Font font = new Font("Arial", Font.BOLD, 11);
ItemNumberLbl = new JLabel("Item Number");
ItemNumberLbl.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
ItemNumberLbl.setFont(font);
ItemNumberLbl.setForeground(LblfontColor);
GBC.gridx = 1;
GBC.gridy = 1;
innercenterpanel.add(ItemNumberLbl, GBC);
ItemNumberTxt = new JTextField(20);
GBC.gridx = 2;
GBC.gridy = 1;
innercenterpanel.add(ItemNumberTxt, GBC);
UnitPriceLbl = new JLabel("Unit Price");
UnitPriceLbl.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
UnitPriceLbl.setFont(font);
UnitPriceLbl.setForeground(LblfontColor);
GBC.gridx = 1;
GBC.gridy = 2;
innercenterpanel.add(UnitPriceLbl, GBC);
UnitPriceTxt = new JTextField(20);
//UnitPriceTxt.setEditable(false);
GBC.gridx = 2;
GBC.gridy = 2;
innercenterpanel.add(UnitPriceTxt, GBC);
QuantityReqLbl = new JLabel("Quantity Required");
QuantityReqLbl.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
QuantityReqLbl.setFont(font);
QuantityReqLbl.setForeground(LblfontColor);
GBC.gridx = 1;
GBC.gridy = 3;
innercenterpanel.add(QuantityReqLbl, GBC);
QuantityReqTxt = new JTextField(20);
//QuantityReqTxt.setEditable(false);
GBC.gridx = 2;
GBC.gridy = 3;
innercenterpanel.add(QuantityReqTxt, GBC);
TotPriceLbl = new JLabel("Total Price");
TotPriceLbl.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
TotPriceLbl.setFont(font);
TotPriceLbl.setForeground(LblfontColor);
GBC.gridx = 1;
GBC.gridy = 4;
innercenterpanel.add(TotPriceLbl, GBC);
TotPriceTxt = new JTextField(20);
//TotPriceTxt.setEditable(false);
GBC.gridx = 2;
GBC.gridy = 4;
innercenterpanel.add(TotPriceTxt, GBC);
return innercenterpanel;
public JPanel createInnerBottomPanel(){
innerbottompanel = new JPanel(new FlowLayout(FlowLayout.RIGHT));
innerbottompanel.setBackground(TxtfontColor);
//Setting Font Type and Size
Font font = new Font("Arial", Font.BOLD, 11);
GrandTotLbl = new JLabel("Grand Total");
GrandTotLbl.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
GrandTotLbl.setFont(font);
GrandTotLbl.setForeground(LblfontColor);
innerbottompanel.add(GrandTotLbl);
innerbottompanel.add(Box.createHorizontalStrut(30));
GrandTotTxt = new JTextField(20);
innerbottompanel.add(GrandTotTxt);
return innerbottompanel;
public JPanel createInnerRightPanel(){
innerrightpanel = new JPanel(new FlowLayout(FlowLayout.CENTER));
innerrightpanel.setBackground(TxtfontColor);
innerrightpanel.setLayout(new BoxLayout(navrightpanel, BoxLayout.Y_AXIS));
innerrightpanel.setBorder(BorderFactory.createLoweredBevelBorder());
innerrightpanel.setLayout(new GridBagLayout());
GridBagConstraints GBC = new GridBagConstraints();
GBC.fill = GridBagConstraints.HORIZONTAL;
internalnextbtn = new JButton(createNextButtonIcon());
GBC.gridx = 1;
GBC.gridy = 1;
internalnextbtn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
//getInnerFieldText(currentItem);
internalprevbtn.setEnabled(true);
if(currentItem < MaxItems){
++CurrentRecord;
//readOrder();
//readInnerOrderRecord(CurrentRecord);
setInnerFieldText(currentItem);
System.out.println(CurrentRecord);//Checking RECORD_NUM
if(currentItem == MaxItems){
internalnextbtn.setEnabled(false);
innerrightpanel.add(internalnextbtn, GBC);
return innerrightpanel;
public JPanel createInnerLeftPanel(){
innerleftpanel = new JPanel(new FlowLayout(FlowLayout.CENTER));
innerleftpanel.setBackground(TxtfontColor);
innerleftpanel.setBorder(BorderFactory.createLoweredBevelBorder());
innerleftpanel.setForeground(Color.BLACK);
innerleftpanel.setLayout(new GridBagLayout());
GridBagConstraints GBC = new GridBagConstraints();
GBC.fill = GridBagConstraints.HORIZONTAL;
internalprevbtn = new JButton(createPreviousButtonIcon());
GBC.gridx = 1;
GBC.gridy = 1;
internalprevbtn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
//getInnerFieldText(currentItem);
internalnextbtn.setEnabled(true);
if(currentItem == 1){
internalprevbtn.setEnabled(false);
if(currentItem > 0){
--currentItem;
//readOrder();
setInnerFieldText(currentItem);
innerleftpanel.add(internalprevbtn, GBC);
return innerleftpanel;
public JPanel createCustOrdDetailsButtons(){
createbuttonpanel();
buttonpanel.setBackground(TxtfontColor);
externalprevbtn = new JButton(createPreviousButtonIcon());
externalprevbtn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
getFieldText(CurrentRecord);
externalnextbtn.setEnabled(true);
if(CurrentRecord == 1){
externalprevbtn.setEnabled(false);
if(CurrentRecord > 0){
--CurrentRecord;
setFieldText(CurrentRecord);
System.out.println(CurrentRecord);//Checking RECORD_NUM
buttonpanel.add(externalprevbtn);
addrecordbtn = new JButton("Add Record", createAddButtonIcon());
addrecordbtn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
try{
MaxRecord = readRecordNumber();
MaxRecord++;
writeRecordNumber(MaxRecord);
//--<BEGINNING>--Clear Fields-------------------------------------------------------//
CustIDTxt.setText("");
CustOrderIDTxt.setText(""+MaxRecord);
//Get today's date
Date todaydate = new Date();
OrderedDateTxt.setText(""+simpleDF.format(todaydate));
ItemNumberTxt.setText("");
UnitPriceTxt.setText("");
QuantityReqTxt.setText("");
TotPriceTxt.setText("");
GrandTotTxt.setText("");
//--<END>--Clear Fields-------------------------------------------------------------//
externalnextbtn.setEnabled(false);
externalprevbtn.setEnabled(true);
System.out.println(MaxRecord);
} catch(Exception ec){ec.printStackTrace();}
buttonpanel.add(addrecordbtn);
savebtn = new JButton("Save Data", createSaveButtonIcon());
savebtn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
setFieldText(CurrentRecord);
writeOrder();
writeRecordNumber(MaxRecord);
System.out.println(CurrentRecord);
System.out.println(MaxRecord);
buttonpanel.add(savebtn);
java.net.URL imageURL_AddRowIcon = CommonFeatures.class.getResource("Icons/edit_add.png");
ImageIcon AddRowIcon = new ImageIcon(imageURL_AddRowIcon);
additemreqbtn = new JButton("Add Item", AddRowIcon);
additemreqbtn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
try{
//--<BEGINNING>--Clear Fields-------------------------------------------------------//
ItemNumberTxt.setText("");
UnitPriceTxt.setText("");
QuantityReqTxt.setText("");
TotPriceTxt.setText("");
//--<END>--Clear Fields-------------------------------------------------------------//
//CurrentRecord = MaxRecord;
currentItem++;
setInnerFieldText(currentItem);
internalnextbtn.setEnabled(false);
internalprevbtn.setEnabled(true);
System.out.println(MaxRecord);
} catch(Exception ec){ec.printStackTrace();}
buttonpanel.add(additemreqbtn);
externalnextbtn = new JButton(createNextButtonIcon());
externalnextbtn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
getFieldText(CurrentRecord);
externalprevbtn.setEnabled(true);
if(CurrentRecord < MaxRecord){
++CurrentRecord;
setFieldText(CurrentRecord);
System.out.println(CurrentRecord);//Checking RECORD_NUM
if(CurrentRecord == MaxRecord){
externalnextbtn.setEnabled(false);
buttonpanel.add(externalnextbtn);
return buttonpanel;
//TODO
public void setFieldText(int orderID){//TODO
orderDetails[orderID].setCustID(Integer.parseInt(CustIDTxt.getText()));
orderDetails[orderID].setCustOrderID(Integer.parseInt(CustOrderIDTxt.getText()));
orderDetails[orderID].setOrderDate(OrderedDateTxt.getText());
orderDetails[orderID].setInnerCustOrdObj(innerCustOrdObj);
orderDetails[orderID].setMaxItems(MaxItems);
setInnerFieldText(currentItem);
orderDetails[orderID].setGrandTotal(Float.parseFloat(GrandTotTxt.getText()));
public void setInnerFieldText(int currentItem){//TODO
innerCustOrdObj[currentItem] = new InnerCustOrdObject();
innerCustOrdObj[currentItem].setItemNumber(Integer.parseInt(ItemNumberTxt.getText()));
innerCustOrdObj[currentItem].setUnitPrice(Float.parseFloat(UnitPriceTxt.getText()));
innerCustOrdObj[currentItem].setQuantityRequired(Integer.parseInt(QuantityReqTxt.getText()));
innerCustOrdObj[currentItem].setTotalPrice(Float.parseFloat(TotPriceTxt.getText()));
public void getFieldText(int orderID){
CustIDTxt.setText(Integer.toString(orderDetails[orderID].getCustID()));
CustOrderIDTxt.setText(Integer.toString(orderDetails[orderID].getCustOrderID()));
OrderedDateTxt.setText(""+orderDetails[orderID].getOrderDate());
currentItem = orderDetails[orderID].getMaxItems();
System.err.println("currentItem" + currentItem);
getInnerFieldText(currentItem);
GrandTotTxt.setText(Float.toString(orderDetails[orderID].getGrandTotal()));
public void getInnerFieldText(int currentItem){
ItemNumberTxt.setText(Integer.toString(innerCustOrdObj[currentItem].getItemNumber()));
UnitPriceTxt.setText(Float.toString(innerCustOrdObj[currentItem].getUnitPrice()));
QuantityReqTxt.setText(Integer.toString(innerCustOrdObj[currentItem].getQuantityRequired()));
TotPriceTxt.setText(Float.toString(innerCustOrdObj[currentItem].getTotalPrice()));
public void writeOrder(){//TODO
try {
objOut = new ObjectOutputStream(new FileOutputStream(OrderDetailsFile));
objOut.writeObject(orderDetails);
System.out.println("WORKING!");
objOut.flush();
objOut.close();
} catch (IOException e) {
e.printStackTrace();
public Object readOrder(){
Object temporaryObj;
try{
objIn = new ObjectInputStream(new FileInputStream(OrderDetailsFile));
temporaryObj = objIn.readObject();
CustOrdObject[] blah = (CustOrdObject[]) temporaryObj;
System.out.println("Outer: "+blah[1].getCustID());
InnerCustOrdObject[] whee = blah[1].getInnerCustOrdObj();
System.out.println("Inner: "+whee[1].getItemNumber());
objIn.close();
System.out.println("Read Worky!");
return temporaryObj;
}catch(Exception e){
e.printStackTrace();
System.out.println("Read No Worky!");
return null;
public void writeRecordNumber(int MaxRecord){
try{
objOut = new ObjectOutputStream(new FileOutputStream(OrdRecordNumStore));
objOut.writeObject(MaxRecord);
System.out.println("WORKING!");
objOut.flush();
objOut.close();
}catch(Exception e){e.printStackTrace();}
public int readRecordNumber() {
try {
objIn = new ObjectInputStream(new FileInputStream(OrdRecordNumStore));
int temporaryObj = Integer.parseInt(objIn.readObject().toString());
objIn.close();
System.out.println("Read Number Worky!");
return temporaryObj;
} catch (Exception e) {
e.printStackTrace();
System.out.println("Read Number No Worky!");
return -1;
}Message was edited by:
Kilik07
Message was edited by:
Kilik07ok i got reading to work to a certain extent... but the prob is i cnt seem to save my innerCustOrdObj proprly...when ever i look for a record using the gotorecordbtn, the outerobject, which is the orderDetails, seems to change but the innerCustOrdObj remains the same... heres the new code..
public class CustomerOrderDetails extends CommonFeatures{
//TODO
private static int MAX_ORDERS = 200;
private static int MAX_ORDERITEMS = 100;
private static int MaxRecord;
private static int CurrentRecord = 1;
private static int currentItem;
private static int MaxItems = 1;
private static boolean FileExists, recFileExists;
private static boolean RecordExists;
private static CustOrdObject[] orderDetails = new CustOrdObject[MAX_ORDERS];
private static InnerCustOrdObject[] innerCustOrdObj = new InnerCustOrdObject[MAX_ORDERITEMS];
private static File OrderDetailsFile = new File("CustOrdDetails.ser");
private static File OrdRecordNumStore = new File("OrdRecordNumStore.txt");
private static PrintWriter writeFile;
private static BufferedReader readFile;
private static ObjectOutputStream objOut;
private static ObjectInputStream objIn;
//Set format for date
SimpleDateFormat simpleDF = new SimpleDateFormat("dd MM yyyy");
//--<BEGINNING>--Declaring Interface Variables------------------------------------------//
private JPanel innertoppanel, innercenterpanel, innerbottompanel, innerrightpanel, innerleftpanel;
private JLabel CustIDLbl, CustOrderIDLbl, OrderedDateLbl, GrandTotLbl, ItemNumberLbl,UnitPriceLbl, QuantityReqLbl, TotPriceLbl;
private JTextField CustIDTxt, CustOrderIDTxt, OrderedDateTxt, GrandTotTxt, ItemNumberTxt, UnitPriceTxt, QuantityReqTxt, TotPriceTxt;
private JButton addrecordbtn, savebtn, externalprevbtn, externalnextbtn, internalprevbtn, internalnextbtn, gotorecordbtn, additemreqbtn;
//--<END>--Declaring Interface Variables------------------------------------------------//
public static void main(String[] args) {
final CustomerOrderDetails COD = new CustomerOrderDetails();
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
COD.createCustOrdDetailsScreen();
} catch (Exception eb) {
eb.printStackTrace();
//--<BEGINNING>--Creating CustomerOrderDetails Screen---------------------------------------//
public JFrame createCustOrdDetailsScreen() {
createDefaultFrame();
mainframe.setSize(800,500);
createContainerPanel();
containerpanel.add(createCustOrdDetailsTitle(), BorderLayout.NORTH);
containerpanel.add(createCustOrdDetailsMainPanel(), BorderLayout.CENTER);
//containerpanel.add(createCustOrdDetailsLeftNavButtons(), BorderLayout.WEST);
//containerpanel.add(createCustOrdDetailsRightNavButtons(), BorderLayout.EAST);
containerpanel.add(createCustOrdDetailsButtons(), BorderLayout.SOUTH);
mainframe.setContentPane(containerpanel);
mainframe.setLocationRelativeTo(null);
mainframe.setVisible(true);
//--<BEGINNING>--Checks to see whether CRecordNumberStore file exists-------------------------------//
if (OrdRecordNumStore.exists() == true) {
recFileExists = true;
}else {
recFileExists = false;
if (recFileExists == true) {
MaxRecord = readRecordNumber();
CurrentRecord = MaxRecord;
//readOrder();
//readInnerOrderRecord(CurrentRecord);
System.out.println("Current Record " +CurrentRecord);
System.out.println("Max Record " +MaxRecord);
}else{
MaxRecord = 1;
writeRecordNumber(MaxRecord);
CustOrderIDTxt.setText(""+MaxRecord);
System.out.println("Current Record " +CurrentRecord);
System.out.println("Max Record " +MaxRecord);
//--<END>--Checks to see whether CRecordNumberStore file exists--------------------------------------//
if(readOrder() != null){
orderDetails = (CustOrdObject[]) readOrder();
//CurrentRecord--;
//System.out.println("Current Rec Here"+CurrentRecord);
if(orderDetails[CurrentRecord] == null){
System.err.println("CustomerOrderObj 1 is null !!");
}else{
System.err.println("CustomerOrderObj 1 is not null !!");
if(orderDetails[CurrentRecord].getInnerCustOrdObj() == null){
System.err.println("InnerCustomerOrderObj is null !!");
}else{
System.err.println("InnerCustomerOrderObj is not null !!");
innerCustOrdObj = orderDetails[CurrentRecord].getInnerCustOrdObj();
MaxItems = orderDetails[CurrentRecord].getMaxItems();
if(CurrentRecord > 1 && CurrentRecord < MaxRecord){
externalnextbtn.setEnabled(true);
externalprevbtn.setEnabled(true);
if(CurrentRecord >= MaxRecord){
externalnextbtn.setEnabled(false);
getFieldText(CurrentRecord);
getInnerFieldText(MaxItems);
}else{
orderDetails[CurrentRecord] = new CustOrdObject();
currentItem = 1;
return mainframe;
//--<END>--Creating CustomerOrderDetails Screen---------------------------------------------//
public JPanel createCustOrdDetailsTitle(){
createTitlePanel();
titlepanel.setBackground(TxtfontColor);
label.setText("- Customer Order Details -");
labelpanel.setBackground(TxtfontColor);
label.setForeground(Color.white);
createbuttonpanel();
buttonpanel.setBackground(TxtfontColor) ;
buttonpanel.add(createReturnToMainMenuButton());
titlepanel.add(labelpanel, BorderLayout.WEST);
titlepanel.add(buttonpanel, BorderLayout.EAST);
return titlepanel;
public JPanel createCustOrdDetailsMainPanel(){
createmainpanel();
mainpanel.setBackground(TxtfontColor);
mainpanel.setLayout(new BorderLayout());
mainpanel.setBorder(BorderFactory.createTitledBorder(""));
mainpanel.add(createInnerTopPanel(), BorderLayout.NORTH);
mainpanel.add(createInnerCenterPanel(), BorderLayout.CENTER);
mainpanel.add(createInnerBottomPanel(), BorderLayout.SOUTH);
mainpanel.add(createInnerRightPanel(), BorderLayout.EAST);
mainpanel.add(createInnerLeftPanel(), BorderLayout.WEST);
return mainpanel;
public JPanel createInnerTopPanel(){
innertoppanel = new JPanel(new GridBagLayout());
innertoppanel.setBackground(TxtfontColor);
GridBagConstraints GBC = new GridBagConstraints();
GBC.fill = GridBagConstraints.HORIZONTAL;
//Setting Font Type and Size
Font font = new Font("Arial", Font.BOLD, 11);
CustIDLbl = new JLabel("Customer ID");
CustIDLbl.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
CustIDLbl.setFont(font);
CustIDLbl.setForeground(LblfontColor);
GBC.gridx = 1;
GBC.gridy = 1;
innertoppanel.add(CustIDLbl, GBC);
CustIDTxt = new JTextField(20);
CustIDTxt.setEditable(true);
GBC.gridx = 2;
GBC.gridy = 1;
innertoppanel.add(CustIDTxt, GBC);
GBC.gridx = 3;
GBC.gridy = 1;
innertoppanel.add(Box.createHorizontalStrut(220), GBC);
OrderedDateLbl = new JLabel("Order Date");
OrderedDateLbl.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
OrderedDateLbl.setFont(font);
OrderedDateLbl.setForeground(LblfontColor);
GBC.gridx = 4;
GBC.gridy = 1;
innertoppanel.add(OrderedDateLbl, GBC);
//Get today's date
Date todaydate = new Date();
OrderedDateTxt = new JTextField(simpleDF.format(todaydate), 20);
OrderedDateTxt.setHorizontalAlignment(JTextField.CENTER);
OrderedDateTxt.setEditable(false);
GBC.gridx = 5;
GBC.gridy = 1;
innertoppanel.add(OrderedDateTxt, GBC);
CustOrderIDLbl = new JLabel("Customer Order ID");
CustOrderIDLbl.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
CustOrderIDLbl.setFont(font);
CustOrderIDLbl.setForeground(LblfontColor);
GBC.gridx = 1;
GBC.gridy = 2;
innertoppanel.add(CustOrderIDLbl, GBC);
CustOrderIDTxt = new JTextField(20);
//CustOrderIDTxt.setEditable(false);
GBC.gridx = 2;
GBC.gridy = 2;
innertoppanel.add(CustOrderIDTxt, GBC);
return innertoppanel;
public JPanel createInnerCenterPanel(){
innercenterpanel = new JPanel(new GridBagLayout());
innercenterpanel.setBackground(TxtfontColor);
innercenterpanel.setBorder(BorderFactory.createLoweredBevelBorder());
GridBagConstraints GBC = new GridBagConstraints();
GBC.fill = GridBagConstraints.HORIZONTAL;
//Setting Font Type and Size
Font font = new Font("Arial", Font.BOLD, 11);
ItemNumberLbl = new JLabel("Item Number");
ItemNumberLbl.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
ItemNumberLbl.setFont(font);
ItemNumberLbl.setForeground(LblfontColor);
GBC.gridx = 1;
GBC.gridy = 1;
innercenterpanel.add(ItemNumberLbl, GBC);
ItemNumberTxt = new JTextField(20);
GBC.gridx = 2;
GBC.gridy = 1;
innercenterpanel.add(ItemNumberTxt, GBC);
UnitPriceLbl = new JLabel("Unit Price");
UnitPriceLbl.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
UnitPriceLbl.setFont(font);
UnitPriceLbl.setForeground(LblfontColor);
GBC.gridx = 1;
GBC.gridy = 2;
innercenterpanel.add(UnitPriceLbl, GBC);
UnitPriceTxt = new JTextField(20);
//UnitPriceTxt.setEditable(false);
GBC.gridx = 2;
GBC.gridy = 2;
innercenterpanel.add(UnitPriceTxt, GBC);
QuantityReqLbl = new JLabel("Quantity Required");
QuantityReqLbl.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
QuantityReqLbl.setFont(font);
QuantityReqLbl.setForeground(LblfontColor);
GBC.gridx = 1;
GBC.gridy = 3;
innercenterpanel.add(QuantityReqLbl, GBC);
QuantityReqTxt = new JTextField(20);
//QuantityReqTxt.setEditable(false);
GBC.gridx = 2;
GBC.gridy = 3;
innercenterpanel.add(QuantityReqTxt, GBC);
TotPriceLbl = new JLabel("Total Price");
TotPriceLbl.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
TotPriceLbl.setFont(font);
TotPriceLbl.setForeground(LblfontColor);
GBC.gridx = 1;
GBC.gridy = 4;
innercenterpanel.add(TotPriceLbl, GBC);
TotPriceTxt = new JTextField(20);
TotPriceTxt.setEditable(false);
TotPriceTxt.addFocusListener(new FocusAdapter(){
public void focusGained(FocusEvent evt){
TotPriceTxt.setText(""+Integer.parseInt(UnitPriceTxt.getText())*Integer.parseInt(QuantityReqTxt.getText()));
GBC.gridx = 2;
GBC.gridy = 4;
innercenterpanel.add(TotPriceTxt, GBC);
return innercenterpanel;
public JPanel createInnerBottomPanel(){
innerbottompanel = new JPanel(new FlowLayout(FlowLayout.RIGHT));
innerbottompanel.setBackground(TxtfontColor);
//Setting Font Type and Size
Font font = new Font("Arial", Font.BOLD, 11);
GrandTotLbl = new JLabel("Grand Total");
GrandTotLbl.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
GrandTotLbl.setFont(font);
GrandTotLbl.setForeground(LblfontColor);
innerbottompanel.add(GrandTotLbl);
innerbottompanel.add(Box.createHorizontalStrut(30));
GrandTotTxt = new JTextField(20);
innerbottompanel.add(GrandTotTxt);
return innerbottompanel;
public JPanel createInnerRightPanel(){
innerrightpanel = new JPanel(new FlowLayout(FlowLayout.CENTER));
innerrightpanel.setBackground(TxtfontColor);
innerrightpanel.setLayout(new BoxLayout(navrightpanel, BoxLayout.Y_AXIS));
innerrightpanel.setBorder(BorderFactory.createLoweredBevelBorder());
innerrightpanel.setLayout(new GridBagLayout());
GridBagConstraints GBC = new GridBagConstraints();
GBC.fill = GridBagConstraints.HORIZONTAL;
internalnextbtn = new JButton(createNextButtonIcon());
GBC.gridx = 1;
GBC.gridy = 1;
internalnextbtn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
getInnerFieldText(currentItem);
internalprevbtn.setEnabled(true);
if(currentItem < MaxItems){
++currentItem;
orderDetails[CurrentRecord].getInnerCustOrdObj();
setInnerFieldText(currentItem);
System.out.println("Current Item" + currentItem);
if(currentItem == MaxItems){
internalnextbtn.setEnabled(false);
innerrightpanel.add(internalnextbtn, GBC);
return innerrightpanel;
public JPanel createInnerLeftPanel(){
innerleftpanel = new JPanel(new FlowLayout(FlowLayout.CENTER));
innerleftpanel.setBackground(TxtfontColor);
innerleftpanel.setBorder(BorderFactory.createLoweredBevelBorder());
innerleftpanel.setForeground(Color.BLACK);
innerleftpanel.setLayout(new GridBagLayout());
GridBagConstraints GBC = new GridBagConstraints();
GBC.fill = GridBagConstraints.HORIZONTAL;
internalprevbtn = new JButton(createPreviousButtonIcon());
GBC.gridx = 1;
GBC.gridy = 1;
internalprevbtn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
getInnerFieldText(currentItem);
internalnextbtn.setEnabled(true);
if(currentItem == 1){
internalprevbtn.setEnabled(false);
if(currentItem > 0){
--currentItem;
orderDetails[CurrentRecord].getInnerCustOrdObj();
setInnerFieldText(currentItem);
System.out.println("Current Item" + currentItem);
innerleftpanel.add(internalprevbtn, GBC);
return innerleftpanel;
public JPanel createCustOrdDetailsButtons(){
createbuttonpanel();
buttonpanel.setBackground(TxtfontColor);
externalprevbtn = new JButton(createPreviousButtonIcon());
externalprevbtn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
getFieldText(CurrentRecord);
externalnextbtn.setEnabled(true);
if(CurrentRecord == 1){
externalprevbtn.setEnabled(false);
if(CurrentRecord > 0){
--CurrentRecord;
setFieldText(CurrentRecord);
System.out.println("Current Record " + CurrentRecord);//Checking RECORD_NUM
buttonpanel.add(externalprevbtn);
addrecordbtn = new JButton("Add Record", createAddButtonIcon());
addrecordbtn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
try{
MaxRecord = readRecordNumber();
MaxRecord++;
CurrentRecord = MaxRecord;
orderDetails[CurrentRecord] = new CustOrdObject();
writeRecordNumber(MaxRecord);
MaxItems = 1;
innerCustOrdObj[MaxItems] = new InnerCustOrdObject();
//--<BEGINNING>--Clear Fields-------------------------------------------------------//
CustIDTxt.setText("");
CustOrderIDTxt.setText(""+MaxRecord);
//Get today's date
Date todaydate = new Date();
OrderedDateTxt.setText(""+simpleDF.format(todaydate));
ItemNumberTxt.setText("");
UnitPriceTxt.setText("");
QuantityReqTxt.setText("");
TotPriceTxt.setText("");
GrandTotTxt.setText("");
//--<END>--Clear Fields-------------------------------------------------------------//
externalnextbtn.setEnabled(false);
externalprevbtn.setEnabled(true);
System.out.println(MaxRecord);
} catch(Exception ec){ec.printStackTrace();}
buttonpanel.add(addrecordbtn);
savebtn = new JButton("Save Data", createSaveButtonIcon());
savebtn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
setFieldText(CurrentRecord);
setInnerFieldText(MaxItems);
writeOrder();
writeRecordNumber(MaxRecord);
System.out.println(CurrentRecord);
System.out.println(MaxRecord);
buttonpanel.add(savebtn);
java.net.URL imageURL_AddRowIcon = CommonFeatures.class.getResource("Icons/edit_add.png");
ImageIcon AddRowIcon = new ImageIcon(imageURL_AddRowIcon);
additemreqbtn = new JButton("Add Item", AddRowIcon);
additemreqbtn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
try{
//--<BEGINNING>--Clear Fields-------------------------------------------------------//
ItemNumberTxt.setText("");
UnitPriceTxt.setText("");
QuantityReqTxt.setText("");
TotPriceTxt.setText("");
//--<END>--Clear Fields-------------------------------------------------------------//
//CurrentRecord = MaxRecord;
MaxItems++;
innerCustOrdObj[MaxItems] = new InnerCustOrdObject();
System.out.println("Max Items "+MaxItems);
currentItem = MaxItems;
orderDetails[CurrentRecord].setMaxItems(MaxItems);
///setInnerFieldText(currentItem);
internalnextbtn.setEnabled(false);
internalprevbtn.setEnabled(true);
} catch(Exception ec){ec.printStackTrace();}
buttonpanel.add(additemreqbtn);
externalnextbtn = new JButton(createNextButtonIcon());
externalnextbtn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
getFieldText(CurrentRecord);
externalprevbtn.setEnabled(true);
if(CurrentRecord < MaxRecord){
++CurrentRecord;
setFieldText(CurrentRecord);
System.out.println(CurrentRecord);//Checking RECORD_NUM
if(CurrentRecord == MaxRecord){
externalnextbtn.setEnabled(false);
buttonpanel.add(externalnextbtn);
gotorecordbtn = new JButton("Go To Record", createGotoButtonIcon());
gotorecordbtn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt){
* The text from the GotorecordTxt textfield will be taken and assigned
* to a temporary integer variable called Find.
int Find = Integer.parseInt(CustOrderIDTxt.getText());
for(int j=1; j <= MaxRecord; j++){
* Using a for loop, each record can be read using the readCustRecord
* method.
getFieldText(j);
* An if condition is utilized to check whether the temporary stored variable, Find,
* matches a field in a record. If this record is found, then using the RecordExists
* which was declared at the top, either a true or false statement can be assigned
* If the record exists, then a true statement will be assigned, if not a false
* statement will be assigned.
if(orderDetails[j].getCustOrderID() == Find){
RecordExists = true;
break;
}else{
RecordExists = false;
if(RecordExists == false){
* If the RecordExists is assigned a false statement, then a message will be
* displayed to show that the record does not exist.
JOptionPane.showMessageDialog(null, "Record Does Not Exist!", "Error Message", JOptionPane.ERROR_MESSAGE, createErrorIcon());
}else{
getFieldText(Find);
buttonpanel.add(gotorecordbtn);
return buttonpanel;
//TODO
public void setFieldText(int orderID){//TODO
orderDetails[orderID].setCustID(Integer.parseInt(CustIDTxt.getText()));
orderDetails[orderID].setCustOrderID(Integer.parseInt(CustOrderIDTxt.getText()));
orderDetails[orderID].setOrderDate(OrderedDateTxt.getText());
orderDetails[orderID].setInnerCustOrdObj(innerCustOrdObj);
orderDetails[orderID].setMaxItems(MaxItems);
setInnerFieldText(currentItem);
orderDetails[orderID].setGrandTotal(Float.parseFloat(GrandTotTxt.getText()));
public void setInnerFieldText(int currentItem){//TODO
innerCustOrdObj[currentItem] = new InnerCustOrdObject();
innerCustOrdObj[currentItem].setMaxItems(MaxItems);
innerCustOrdObj[currentItem].setItemNumber(Integer.parseInt(ItemNumberTxt.getText()));
innerCustOrdObj[currentItem].setUnitPrice(Float.parseFloat(UnitPriceTxt.getText()));
innerCustOrdObj[currentItem].setQuantityRequired(Integer.parseInt(QuantityReqTxt.getText()));
innerCustOrdObj[currentItem].setTotalPrice(Float.parseFloat(TotPriceTxt.getText()));
public void getFieldText(int orderID){
CustIDTxt.setText(Integer.toString(orderDetails[orderID].getCustID()));
CustOrderIDTxt.setText(Integer.toString(orderDetails[orderID].getCustOrderID()));
OrderedDateTxt.setText(""+orderDetails[orderID].getOrderDate());
currentItem = orderDetails[orderID].getMaxItems();
orderDetails[orderID].getInnerCustOrdObj();
System.err.println("currentItem" + currentItem);
//getInnerFieldText(currentItem);
GrandTotTxt.setText(Float.toString(orderDetails[orderID].getGrandTotal()));
public void getInnerFieldText(int currentItem){
ItemNumberTxt.setText(Integer.toString(innerCustOrdObj[currentItem].getItemNumber()));
UnitPriceTxt.setText(Float.toString(innerCustOrdObj[currentItem].getUnitPrice()));
QuantityReqTxt.setText(Integer.toString(innerCustOrdObj[currentItem].getQuantityRequired()));
TotPriceTxt.setText(Float.toString(innerCustOrdObj[currentItem].getTotalPrice()));
public void writeOrder(){//TODO
try {
objOut = new ObjectOutputStream(new FileOutputStream(OrderDetailsFile));
objOut.writeObject(orderDetails);
System.out.println("WORKING!");
objOut.flush();
objOut.close();
} catch (IOException e) {
e.printStackTrace();
public Object readOrder(){
Object temporaryObj;
try{
objIn = new ObjectInputStream(new FileInputStream(OrderDetailsFile));
temporaryObj = objIn.readObject();
CustOrdObject[] blah = (CustOrdObject[]) temporaryObj;
/* System.out.println("Outer: "+blah[1].getCustID());
InnerCustOrdObject[] whee = blah[1].getInnerCustOrdObj();
System.out.println("Inner: "+whee[1].getItemNumber());*/
objIn.close();
System.out.println("Read Worky!");
return temporaryObj;
}catch(Exception e){
e.printStackTrace();
System.out.println("Read No Worky!");
return null;
public void writeRecordNumber(int MaxRecord){
try{
objOut = new ObjectOutputStream(new FileOutputStream(OrdRecordNumStore));
objOut.writeObject(MaxRecord);
System.out.println("WORKING!");
objOut.flush();
objOut.close();
}catch(Exception e){e.printStackTrace();}
public int readRecordNumber() {
try {
objIn = new ObjectInputStream(new FileInputStream(OrdRecordNumStore));
int temporaryObj = Integer.parseInt(objIn.readObject().toString());
objIn.close();
System.out.println("Read Number Worky!");
return temporaryObj;
} catch (Exception e) {
e.printStackTrace();
System.out.println("Read Number No Worky!");
return -1;
}Message was edited by:
Kilik07 -
How to read non-java binary file?
Hello Team,
I have problem to read non-java binary file.
Let me explain.... I have one binary file created in vc++ having fix structure. Structure of file is like String,int,int,int.
Now I have to read this file in my java application. I am failed to identify length of String value of Structure in java.
Can any body help me to solve this problem?
Thanks in advance.
- PathikThanks for guide me,
I have try using 0x00. And its working.
Now I have another problem:
in file.ext , I have written one record having structure string,int and int.
I have enter data as "HelloWorld", 100 and 111.
To read first record from file file.ext, following code I am using:
try
FileInputStream fis = new FileInputStream("file.ext");
DataInputStream in = new DataInputStream(fis);
char ch;
while((ch=(char)in.readByte()) != 0x00)
System.out.print(ch+"");
System.out.println();
System.out.println("Integer 1 --> " + in.readInt());
System.out.println("Integer 2 --> " + in.readInt());
in.close();
fis.close();
catch(Exception ex)
System.out.println(ex.toString());
And I am getting following output:
HelloWorld
Integer 1 --> 0
Integer 2 --> 0
File file.ext is created in vc++
I am not getting integer data. Plz guide me for this problem.
Thanks in advance
- Pathik -
HOW TO WRITE AND READ FROM A TEXT FILE???
How can I read from a text file and then display the contents in a JTextArea??????
Also how can I write the contents of a JTextArea to a text file.
Extra Question::::::: Is it possible to write records to a text file. If you have not idea what I am talking about then ignore it.
Manny thanks,
your help is much appreciated though you don't know it!Do 3 things.
-- Look through the API at the java.io package.
-- Search previous posts for "read write from text file"
-- Search java.sun.com for information on the java.io package.
That should clear just about everything up. If you have more specific problems, feel free to come back and post them. -
Getting repeated values when reading from a text file.
I need to read from a text file. When the token encounters a particular word (command) I need to read the next line and perform some actions. However, this part is working but it is repeating the values again and again until it encounters the next particular word (command). Hope that someone will help me out, as always when I posted a problem in these forums.
SetOperations class - contains the set methods
// Imported packages.========================================================
import java.util.Vector;
import java.util.Iterator;
// Public class SetOperations.===============================================
public class SetOperations
// Instance variables.===================================================
private Vector v = null; // Creates new instance of vector.
protected int memberCount;
// Constructor.==========================================================
public SetOperations()
v = new Vector();
} // end constructor.
// Method isMember.======================================================
* Checks whether the element is already a member of the set.
* @return True if Vector v contains Object member.
public boolean isMember(Object member)
if (member != null) // only if Object member is not null.
return v.contains(member); // returns true if vector already contains member.
else
return false; // returns false if vector does not contain member.
} // end public boolean isMember(Object member).
// Method addMember.=====================================================
* Adds a member to the set.
* @return Adds Object member to Vector v.
public void addMember(Object member)
//if (! v.contains(member)) // only if element is not already a member.
if (isMember(member) == false) // only if element is not already a member.
v.add(member); // adds a member.
} // end public void addMember(Object member).
// Method countMember.===================================================
* Returns the number of members present in the vector.
* @return Number of elements present in the vector.
public int countMember()
return v.size();
} // end public int countMember().
// Method isSetEmpty.====================================================
* Returns true if set is empty.
* @return True if no elements are present in Vector v.
public boolean isSetEmpty()
return v.size() == 0; // returns 0 if no elements are present in the vector.
} // end of public boolean isSetEmpty().
// Method printMember.===================================================
* Displays member/s of the set.
* @return Prints element/s present in the vector.
public void printMember()
for (int i = 0; i < v.size(); i++) // iterates through present members.
System.out.println("[" + i + "] " + v.get(i)); // displays member/s present in the vector.
} // end of public void printMember().
} // end public class SetOperations.
SetTextLauncher class - reads from a text file and implements the set operations
// Imported packages.========================================================
import java.util.*;
import java.io.*;
// Public class SetTestLauncher.=============================================
public class SetTestLauncher
// Main method public static void main(String args[]).===================
public static void main(String args[])
displayFile("test.txt"); // outputs result from text file.
// method to display a file on screen
public static void displayFile (String textFile)
// Instance variables.===============================================
// Creates new instances of SetOperations.
SetOperations setA = new SetOperations();
SetOperations setB = new SetOperations();
SetOperations setC = new SetOperations();
SetOperations setD = new SetOperations();
SetOperations setE = new SetOperations();
// Initialisation.
String line = "", nextLine = "";
FileReader fr = null;
try
// Opens the file with the FileReader data sink stream.
fr = new FileReader(textFile);
// Converts the FileReader input stream with the BufferedReader processing stream.
BufferedReader br = new BufferedReader(fr);
// Iterates through text file reading lines until end of text lines.
while (line != null)
line = br.readLine(); // reads one line at a time.
if(line == null) break; // when the line is null break the loop.
// Creates a new instace of StringTokenizer.
StringTokenizer st = new StringTokenizer(line);
// Loops until there are no more tokens.
while (st.hasMoreTokens())
String token = st.nextToken(); // reads next token.
// Only if the token encounters the String "membera".
if(token.equals("membera"))
nextLine = br.readLine(); // gets next line.
setA.addMember(nextLine); // adds a member to the set.
// Displays members present in the set if vector is not empty.
if (! setA.isSetEmpty())
setA.printMember(); // print members present.
// Displays the number of member/s present in the vector.
System.out.println("Number of set members: " + setA.countMember());
// Catches and displays exceptions.
catch (FileNotFoundException exp)
System.out.println(exp.getMessage());
exp.printStackTrace();
catch (IOException exp)
System.out.println(exp.getMessage());
exp.printStackTrace();
finally
try
// if file is found
if (fr != null)
// close file
fr.close();
catch (IOException exp)
exp.printStackTrace();
} // end public static void main(String args[]).
} // end public class SetTestLauncher.Thanks for your interest. Please ignore SetOperations class, it is just the class containing the methods and it works correctly since I checked it without reading from a text file. I marked the part where I think lies my problem in class SetTestOperations.
The information in the text file is as follows:
membera
Hillman
membera
Skoda
membera
Honda
membera
Toyota
and the result is:
[0] Hillman
Number of set members: 1
[0] Hillman
[1] Skoda
Number of set members: 2
[0] Hillman
[1] Skoda
[2] Honda
Number of set members: 3
[0] Hillman
[1] Skoda
[2] Honda
[3] Toyota
Number of set members: 4
instead of just one set:
[0] Hillman
[1] Skoda
[2] Honda
[3] Toyota
Number of set members: 4
Hope it is easier to understand like this.
Regards
Marco
I need to read from a text file. When the token
encounters a particular word (command) I need to read
the next line and perform some actions. However, this
part is working but it is repeating the values again
and again until it encounters the next particular
word (command). Hope that someone will help me out,
as always when I posted a problem in these forums.
SetOperations class - contains the set
methods
// Imported
packages.=============================================
===========
import java.util.Vector;
import java.util.Iterator;
// Public class
SetOperations.========================================
=======
public class SetOperations
// Instance
e
variables.============================================
=======
private Vector v = null; // Creates new instance of
f vector.
protected int memberCount;
Constructor.==========================================
================
public SetOperations()
v = new Vector();
} // end constructor.
// Method
d
isMember.=============================================
=========
* Checks whether the element is already a member of
f the set.
* @return True if Vector v contains Object member.
public boolean isMember(Object member)
if (member != null) // only if Object member is not
ot null.
return v.contains(member); // returns true if
if vector already contains member.
else
return false; // returns false if vector does not
not contain member.
} // end public boolean isMember(Object member).
// Method
d
addMember.============================================
=========
* Adds a member to the set.
* @return Adds Object member to Vector v.
public void addMember(Object member)
//if (! v.contains(member)) // only if element is
is not already a member.
if (isMember(member) == false) // only if element
nt is not already a member.
v.add(member); // adds a member.
} // end public void addMember(Object member).
// Method
d
countMember.==========================================
=========
* Returns the number of members present in the
e vector.
* @return Number of elements present in the vector.
public int countMember()
return v.size();
} // end public int countMember().
// Method
d
isSetEmpty.===========================================
=========
* Returns true if set is empty.
* @return True if no elements are present in Vector
r v.
public boolean isSetEmpty()
return v.size() == 0; // returns 0 if no elements
ts are present in the vector.
} // end of public boolean isSetEmpty().
// Method
d
printMember.==========================================
=========
* Displays member/s of the set.
* @return Prints element/s present in the vector.
public void printMember()
for (int i = 0; i < v.size(); i++) // iterates
es through present members.
System.out.println("[" + i + "] " + v.get(i)); //
// displays member/s present in the vector.
} // end of public void printMember().
} // end public class SetOperations.
SetTextLauncher class - reads from a text file
and implements the set operations
// Imported
packages.=============================================
===========
import java.util.*;
import java.io.*;
// Public class
SetTestLauncher.======================================
=======
public class SetTestLauncher
// Main method public static void main(String
g args[]).===================
public static void main(String args[])
displayFile("test.txt"); // outputs result from
om text file.
// method to display a file on screen
public static void displayFile (String textFile)
// Instance
ce
variables.============================================
===
// Creates new instances of SetOperations.
SetOperations setA = new SetOperations();
// Initialisation.
String line = "", nextLine = "";
FileReader fr = null;
try
// Opens the file with the FileReader data sink
ink stream.
fr = new FileReader(textFile);
// Converts the FileReader input stream with the
the BufferedReader processing stream.
BufferedReader br = new BufferedReader(fr);
// Iterates through text file reading lines until
til end of text lines.
while (line != null)
line = br.readLine(); // reads one line at a
at a time.
if(line == null) break; // when the line is null
null break the loop.
// Creates a new instace of StringTokenizer.
StringTokenizer st = new StringTokenizer(line);
// Loops until there are no more tokens.
while (st.hasMoreTokens())
String token = st.nextToken(); // reads next
next token.
// Only if the token encounters the String
tring "membera".
if(token.equals("membera"))
// *****THE PROBLEM LIES HERE....I GUESS
// need to read the next line after encountering the word membera in text file
nextLine = br.readLine(); // gets next line.
setA.addMember(nextLine); // adds a member to
ber to the set.
// Displays members present in the set if
set if vector is not empty.
if (! setA.isSetEmpty())
setA.printMember(); // print members present.
// Displays the number of member/s present in
ent in the vector.
System.out.println("Number of set members: " +
s: " + setA.countMember());
// Catches and displays exceptions.
catch (FileNotFoundException exp)
System.out.println(exp.getMessage());
exp.printStackTrace();
catch (IOException exp)
System.out.println(exp.getMessage());
exp.printStackTrace();
finally
try
// if file is found
if (fr != null)
// close file
fr.close();
catch (IOException exp)
exp.printStackTrace();
} // end public static void main(String args[]).
} // end public class SetTestLauncher. -
Cannot read from the source file or disk
I had to get a new hard drive for my Satellite A665 old one kept freezing up; had a recovey disk from Geek Squad when I got it but they did not work. So I ordered a Recovery Disc set from Toshiba.
A few minutes after I insert the 3nd disc, I get the following message:
Cannot read from the source file or disk
PREINST14.SWM
Type: SWM File
Size: 670 MB
Modified: 10/29/2010 11:24pm
Clicking [Try Again] or [Skip] clicked try again twice. Gave same message so clicked skip. Got another message.
Cannot read from the source file or disk
PREINST18.SWM
Type: SWM File
Size: 372 MB
Modified: 10/29/2010 11:24pm
Clicking [Try Again] or [Skip] clicked try again twice. Gave same message so clicked skip after checking do it for next one. Got error message.
An error has occurred.
Error: 10-FC06-0002
Recovery Error.
Please press [OK] to turn off the computer.
I tried erasing the disk, then running the Recovery Wizard again, but wind up in the same place.It's hard to know exactly what the problem is. You might want to contact customer support because it could just be a faulty disc.
- Peter -
I was wondering, what do i need to look at to get cracking with making a programme that can read from a excel file
I was thinking of making a programme that uses a excel spreadsheet <this spreadsheet is made and provided by the national lottery and has all the winning combinations that have been drawn in past draws> and reading them in and generating a list of combinations that have not occured yet
Its just for a bit of fun, but could be a good challenege
thanksPaulOckleford wrote:
If all you want to do is select from the excel sheet you may find it easier to use the jdbc option, I have an example of some code I wrote that does a select from an excel sheet and it may be useful for you:Just my opinion here but I would avoid using odbc to deal with the spreadsheet if at all possible.
Time for a war story:
After losing an argument with some business, marketng and management I had to develop a program that accepted spreadsheets as datafiles and it was nothing but trouble.
I experienced all kinds of type problems, the most common and annoying of them being
that the driver (via some logic unknown to me) will determine the type of each column.
Any data that is does not match that expectation is dropped (I found that the query returned NULL).
As far as I could tell there was no way to make the driver treat the data the way you want it too.
After much trouble and lots of manual intervention by the poor person who has to deal with this data on a regular basis it seems to be working but it was not fun it is still very ugly code.
You may not end up reliving my tale of woe, but I though I would give you some fair warning.
As I continue to say "Spreadsheets are not a reasonable data transfer format." -
Reading little endian binary files
Hi,
Recently I tried to read from a little endian binary files. Here is the code:
FileInputStream file_input = new FileInputStream (file);
DataInputStream data_in = new DataInputStream (file_input );
while (true) {
try {
short i_data = data_in.readShort ();
catch (EOFException eof) {
System.out.println ("End of File");
break;
System.out.println ( i_data );
But I am getting wrong values (big-endian). I will be pleased if anyone can help me in this respect.Hi,
Finally, I can do it easily with reading little endian binary files in java. Here is the code:
FileInputStream file_input = new FileInputStream (file);
DataInputStream data_in = new DataInputStream (file_input );
while (true) {
try {
int low = data_in.readByte() & 0xff;
int high = data_in.readByte() & 0xff;
short i_data = (short) (high << 8 | low) ;
catch (EOFException eof) {
System.out.println ("End of File");
break;
System.out.println ( i_data );
} -
I work for Office Depot, in the tech department. Basically, one of our associates was supposed to do a data backup, and re-install Windows 7, then transfer the files back. He used Windows Easy Transfer and compacted everything into a 163 GB file.
Now comes the hard part. When we try to put it back on his computer ((drag-and-drop to the desktop) which has been wiped back to factory settings using the recovery partition), it stops at 79.5 GB remaining (you know how it doesn't give you a % of completion,
it just shows how many GB are remaining) and then says "Can't read from the source file or disk" and gives you an option to try again, or cancel. It gets hung up on the same point each time.
Normally, this wouldn't be a huge issue, but the contents on the drive are his wife's architect blueprints and interior design stuff, along with wedding photos, etc, which are the only copies they have. On top of those, they have court documents and other
important files that we are unable to access now.
I wasn't involved with this transfer, so I'm trying to clean up the mess as best I can. I remembered that the customer's wife was Russian, and had some files typed with a Russian keyboard, so on and so forth. I wonder if that's the issue? If not, I really
have no idea how to manually extract things from a ".mig" file, or how to diagnose what area is potentially corrupted.
In light of this situation, we tried using "Recuva" to recover the files post-wipe, but everything was corrupted or unable to be opened, and it also extracted and recovered all of the "useless" photos, such as the skype logos, up and
down arrows for browsers, etc (it was 160,000+ photos).
Trying to avoid a potential lawsuit, unhappy customer, and costing the company lots of money to see if professionals can get into this external hard drive.
Other relevant information:
We used a Toshiba 500 GB (465 GB) external hard drive.
Customer's computer is an HP Pavilion P6000 Series (Model No. p6520y) running Windows 7 Home Premium 64-bit Service Pack 1.
Any other information that is needed can be provided, thanks in advance, and hopefully we can find a solution to this issue quickly!
-JohnI think there's a lack of understanding somewhere.
"If you even can't start the process, please unplug it from your new PC. Then head back to your new computer and plug
the external drive back in to your new computer. "
Unplug from new, head back to new, plug it back in? That doesn't make much sense! Haha.
I knew what you meant though, somewhat. When I search through the drives after clicking yes (Has windows easy transfer
already saved your files blah blah blah) I click on the transfer file and it says "Windows Easy Transfer could not open the file".
Rather than drag-and-drop the file to the desktop, I now tried to double-click on the file itself while it was plugged
into the computer. It opened, and it started transferring until it was about 70% completed, and then an error popped up saying "WET can't open the easy transfer file, make sure your USB device is plugged in or check your internet connection".
I checked, and the USB hard drive's light wasn't on. Now, I unplug it and plug it back in, and the light comes back on,
so I click Retry, and it resets the bar back to nothing and says "Transfer time: 1 minute".
Rather than continue trying, I clicked "Cancel" instead of Retry, and it says "Your transfer did not complete successfully."
It says to click "view report" for more information, but there's no "view report button".
At the moment, I am scanning the External Drive for bad sectors using the check disk tool in properties. It's frozen
at "0 USN bytes processed". -
Reading from a text file into a 2D array
How do you read from a text file and put it into a 2D array? Or if someone could guide me to where I can find the information?
This tutorial shows how to read a file:
http://java.sun.com/docs/books/tutorial/essential/io/scanfor.html
This tutorial shows how to create arrays with multiple dimensions:
http://java.sun.com/docs/books/tutorial/java/nutsandbolts/arrays.html -
Crystal Report that reads from an XML file Datetime or Date
I have a Crystal Report 2008 that reads from an XML file, the source File XML Date data looks like this: 2008-03-10
But the Crystal Report interpreted by datatime, I need the Crystal Report to look like this: 2008/03/10 (date) not 2008-03-10T00:00:00-05:00 (datatime)
Look at an example (source file xml, report, and parameter file to execute report) at url: http://www.5websoft.com/sample.zip
Import the file in the design and will to verify that interpret incorrectly the fields of type date as datetime
not mapped currently for fields..
Help.....
Thanks!You could always reformat the field to only display the date portion:
Format Field > Date and Time tab; choose the date style you need here.
Or create a formula to extract just the date and use this field in your report:
date({table.field}) -
Read from a config file in File Adapter in SOA Suite 11g
I want to read from a config file in order to determine whether to archive or delete the file after processing using file adapter in SOA Suite 11g. How do i do that.
only part i replied on was the part of how to read a file
but i think in your case you could do the next
use the sync file adapter to read in the file during your process
based on this content you set a variable "myOutputDirectory"
then create a file adapter (write) which will store the file on file system
http://docs.oracle.com/cd/E23943_01/integration.1111/e10231/adptr_file.htm#CIACICFD
4.3.2.2.5 Specifying a Dynamic Outbound File Name
and use that (jca.file.Directory) property to store the file either on the archive location or the delete location -
Help! Want to read from a xl file and get an output voltage value!!!
Hello..
I`m a beginner, so please help..
My program should output an voltage value that is read from an xl-file with one collum. The most important is that each values in the xl graph should be read per iteration. So that the file is read over time. I want to use this xl file to controll the output signal over time.
Can anyone show me how this VI would look like, and what would the xl file look like??The easiest way to do this is to save your Excel file as a comma or tab separated text file and not the native Excel format. Then you can use Read From Spreadsheet File (on the File I/O palette). Using this, you can read the file all at once and then just have a 1D array that you can wire to a while or for loop so that with each iteration of the loop, you get one element in the array. A for loop automatically indexes an input array. Reading the file all at once will be more effecient that reading the file line by line.
Maybe you are looking for
-
Validation error while creating Web Service Proxy.
Hi, I'm trying to create Web Service Proxy. But I'm stuck with a Validation error model error: type +"{http://xmlns.oracle.com/2001/XMLSchema/DOM}+ +org.w3c.dom.Document" not found.+ I'm using "Create Web Service Proxy" wizard. There are 6 steps in c
-
Error while migrating from version 9201 to 9204
Actully i m migrating the Oracle 9201 to 9204, now after installing only 9201, 1. I created the database and checked, everything was working fine. 2. i shutdown the database. 3. check, still some processes related to oracle like (HTTP server) were ru
-
Adobe Reader 9.1 will not open in OSX 10.5.7
Since loading the latest OSX 10.5.7 update I have not been able to open Adobe Reader. I have removed the version that I had (9.1) and downloaded a fresh copy but it makes no difference - Reader will not open at all. I have tried the reset - again it
-
Problem related to service entry sheet?
Hi All, Can anybody tell me that there is any field in po or service entry sheet through which I can restrict accounting entry of service entry sheet. If Yes then where?
-
how to extract the DDL of a database object in oracle 9201? Thankx in advance for help...