Getting arrays with Class.getDeclaredFields
I would like someone to tell me how is it possible to change values in an array with the getDeclaredFields() method of class Class. I am able to get all fields of my class but i doesn't work with any kind of array..
here is my Class :
class Objet
int index;
int[] valeurs;
I am able to change the value of index with this code:
private void readObject( java.lang.Object o )
java.lang.reflect.Field f[];
java.lang.Class cl = o.getClass();
f = cl.getDeclaredFields()
try
try
f.setInt( o, 0 );
catch ( java.lang.IllegalAccessException e)
System.out.println("illegal access exception ");
catch ( java.lang.IllegalArgumentException e )
System.out.println("illegal argument exception");
can someone please help me?
thanks
In order to make it work you should add f.setAccessible( true) before settung any value.
You may also need to look at the serialization spec, especailly on storing and retrieving fields. http://java.sun.com/j2se/1.3/docs/guide/serialization/spec/serial-arch.doc7.html#5253
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Getting arrays with same types
Hi,
I'm writing an application and at a certain point I need to be able to compare constraints of the same type to see if there are any conflicts.
At first you get an array with all kinds of constraints in it, not sorted and not knowing wich types are in there. I wrote a comparator to sort the array, which works. After sorting I count the different types there are. Now I would like to make a vector for each type and fill these vectors with the constraints, but I'm not sure how I can do this.
What I have so far is:
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[\code]
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thanksVery funny, but doesn't help one bit...
You don't know in advance how many types there will be, so in your code indeed if you have more than three: panic(); not only you don't know how many types there will; you also don't know which types there will be. The type of a constraint is a string though, so you could get, save and compare them...
Isn't there a way to do something like:
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I've written a class loader which extends java.net.URLClassLoader. My class is called EntryClassLoader. It only ovverides findClass() so that it will search a user-supplied path for a class. Beloww is the code:
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My VI is trying to rearrange the 2D array that I read from test.xls file, so that each function is get separated with there data in it.
Look over the test.xls file that I have attached. It has 2 columns. Both contains couple functions designated with ) and (. So, ACU_PGM is considered a function. I have rearranged the data so when ACU_PGM (or PGM is selected) the data following it is data for PGM before another function starts, which is KEY and 500 in this case. Same way for all other functions. Each column always ends by );
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Please look over the Get_function.Vi only half portion. I have instructions in text in Vi also. I saw that columns are not lookin good after I submit the question so please open test.xlx file to see actual data Thank you.Message Edited by Amy222000 on 06-02-2005 03:44 PM
Attachments:
get_function.zip 795 KB
test.xls 14 KBDuplicate Post
E. Sulzer
Applications Engineer
National Instruments -
Problems with getting array length
I couldn't get array length in the java from the oracle.
Here is my source.
Can anybody answer me, I will really appriciate that.
Thanks.
public class Test_tb{
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try {
Double[] retArr = (Double[]) args.getArray();
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} catch (Exception e){}
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}I've rewritten your code to include the display of any exception that might occur. Could you please run it and post any stack trace here? Thanks.
public class Test_tb{
public static double Test (oracle.sql.ARRAY args){
double ret = 0;
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Working with Classes and Arrays
hello to all,
public class Store
//private data
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Person list[] = new Person[maxSize];
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the code above is working with classes and some arrays
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<img src="file:///C:/Documents%20and%20Settings/fh84/Desktop/untitled.JPG" alt="" />public class Store
//private data
private Person list[];
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private int maxSize;
//constructor starts
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// Person list[] = new Person[maxSize];
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//constructor ends
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for(int i=0; i<list.length; i++)
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am sending the code again -
Why does page-break-before get replaced with br class hcp10?
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This issue only occurs when generating an HTML Help CHM file.An alternative method can be found in Item 23 at http://www.grainge.org/pages/snippets/snippets.htm#content.
Are you saying the code in the source file gets changed? I suspect you mean target files but how are you identifying the change in a CHM? Is the change causing a problem?
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Get array values from multidim array
Hello Everyone,
I am working with a two dim array. double twoDim[] = new double[100][100]. If I want to take "strips" of the array based on the x values I just do this.
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My question is how do I do a loop that returns a single dimensional array with respect to the y value ? In effect doing this, (which fails miserably by the way).for(int i = 0; i < twoDim.length; i++)
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Sincerely,
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Lots of blank space when printing array with only last element printed
I have a slight problem I have been trying to figure it out for days but can't see where my problem is, its probably staring me in the face but just can't seem to see it.
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Below is the code, hope you guys can see the problem. Thank you in advance
import java.io.*;
import java.net.*;
import java.lang.*;
import java.util.*;
import javax.swing.*;
public class javaflights4
public static final String MESSAGE_SEPERATOR = "#";
public static final String MESSAGE_SEPERATOR1 = "*";
public static void main(String[] args) throws IOException
String data = null;
File file;
BufferedReader reader = null;
file = new File("datafile.txt");
String flights[] [];
//String flightdata[];
flights = new String[21][7];
int x = 0;
//flightdata = new String[7];
int y = 0;
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reader = new BufferedReader(new FileReader(file));
//data = reader.readLine();
while((data = reader.readLine())!= null)
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for(x = 0; x<=flights.length; x++)
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catch(ArrayIndexOutOfBoundsException e1)
System.out.println("error at " + e1);
catch(Exception e)
finally
try
reader.close();
catch(Exception e)
int i = 0;
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//System.out.println();A number of problems.
First, I bet you see a lot of "error at" messages, don't you? You create a 21x7 array, then go through the first array up to 21, going through the second one all the way to 21 as well.
your second for loop should go to flights[x].length, not flights.length. That will eliminate the need for ArrayIndexOutOfBounds checking, which should have been an indication that you were doing something wrong.
Second, when you get to flights[0][0] (the very first iteration of the inner loop) you are taking every element from the StringTokenizer and setting flights[0][0] to each, thereby overwriting the previous one. There will be nothing in the StringTokenizer left for any of the other (21x7)-1=146 array elements. At the end of all the loops, the very first element in the array (flights[0][0]) should contain the last token in the file.
At the end, you only print the first element (i=0, j=0, println(flight[ i][j])) which explains why you see the last element from the file.
I'm assuming you have a file with 21 lines, each of which has 7 items on the line. Here is some pseudo-code to help you out:
count the lines
reset the file
create a 2d array with the first dimension set to the number of lines.
int i = 0;
while (read a line) {
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count the tokens;
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stuff the tokens into the array;
set flights[i++] to this array;
} -
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I need help in inserting values into an array of class, which i have read from a file.
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Here is my code..........
import java.util.*;
import java.io.*;
public class Tree
static String second;
static String first;
static int count = 5;
public void insert(int f1,int s1, int c)
if(c!=0)
Record[] rec = new Record[4];
for (int i = 0; i < 5; i++)
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for(int i = 0; i<=4;i++)
rec.x = f1;
rec[i].y = s1;
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System.out.println("yes");
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Tree t = new Tree();
try
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String s;
while((s = br.readLine()) != null)
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t.insert(fir, sec, count);
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class Record
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Record[] rec = new Record[4];
for (int i = 0; i < 5; i++)
rec[i] = new Record();
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I was wondering how would you declare an array of class objects. Here is my situation:
I'm working on a project dealing with bank accounts. Each customer has a specific ID and a balance. I have to handle transactions for each customer at different times, so I was thinking that I need an array of class objects; however, I dont know how to initialize them.
Here's what I did:
BankAccount [ ] myAccount = new BankAccount[10];
// 10 = 10 customers
How do I initialize the objects?
ThankzI was wondering how would you declare an array of
class objects. Here is my situation:
I'm working on a project dealing with bank accounts.
Each customer has a specific ID and a balance. I have
to handle transactions for each customer at different
times, so I was thinking that I need an array of
class objects; however, I dont know how to initialize
them.
Here's what I did:
BankAccount [ ] myAccount = new BankAccount[10];
// 10 = 10 customers
How do I initialize the objects?
Thankz
HAI
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Hi,
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Object bytes = new byte[2147483647]; // works
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import javax.swing.*;
import java.awt.Color;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.*;
import java.text.DecimalFormat;
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private static final int FRAME_HEIGHT = 600;
private static final int FRAME_X_ORIGIN = 150;
private static final int FRAME_Y_ORIGIN = 250;
private static final int BUTTON_WIDTH = 80;
private static final int BUTTON_HEIGHT = 30;
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JScrollPane textBoxScroll;
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JButton summaryButton;
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bankSummary customerList[] = new bankSummary[10];
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bankButtonGroup.add(withdrawRadioButton);
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setResizable(false);
setTitle("Ch13 Project");
setLocation(FRAME_X_ORIGIN, FRAME_Y_ORIGIN);
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contentPane.add(depositRadioButton);
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textArea.setColumns(25);
textArea.setRows(20);
textArea.setLineWrap(true);
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textBoxScroll
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textArea.setBorder(BorderFactory.createLineBorder(Color.RED));
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contentPane.add(summaryButton);
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withdrawRadioButton.addActionListener(this);
depositWithdrawButton.addActionListener(this);
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assignArray();
abstract void assignArray() {
for (int i = 0; i < customerList.length; i++) {
customerList[i] = new bankSummary();
customerList[0].setValues("Bob", "Ghost", "1234", "Savings", 500);
customerList[1].setValues("Joe", "Shmo", "1333", "Checking", 600);
customerList[2].setValues("Jack", "Biggs", "9023", "Savings", 200);
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int arrayIndexInt = 3;
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String fNameString = JOptionPane.showInputDialog("First Name: ");
String lNameString = JOptionPane.showInputDialog("Last Name: ");
String pinString = JOptionPane
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String accountType = JOptionPane
.showInputDialog("Checking or Savings Account? Enter (Checking or Savings)");
String initialAmountStr = JOptionPane
.showInputDialog("Initial Deposit Amount: ");
double initialAmountDouble = Double.parseDouble(initialAmountStr);
customerList[arrayIndexInt].setValues(fNameString, lNameString,
pinString, accountType, initialAmountDouble);
arrayIndexInt += 1;
JOptionPane.showMessageDialog(null, "Account Created!");
//if the summary button is pressed, ask for the first name on the account
//then ask for the pin, display the balance for that said account
if (sourceObject == summaryButton) {
String nameVerifyStr = JOptionPane
.showInputDialog("Firstname on Account: ");
String pinVerifyStr = JOptionPane.showInputDialog("Pin Number: ");
if (nameVerifyStr.equals(customerList[0].getFirstName())
&& pinVerifyStr.equals(customerList[0].getPin())) {
textArea.append("Customer: " + customerList[0].getFirstName()
+ " " + customerList[0].getLastName() + "\nAccount: "
+ customerList[0].getAccountType() + "\nBalance: "
+ formatDecimal.format(customerList[0].getBalance()));
if (nameVerifyStr.equals(customerList[1].getFirstName())
&& pinVerifyStr.equals(customerList[1].getPin())) {
textArea.append("Customer: " + customerList[1].getFirstName()
+ " " + customerList[1].getLastName() + "\nAccount: "
+ customerList[1].getAccountType() + "\nBalance: "
+ formatDecimal.format(customerList[1].getBalance()));
if (nameVerifyStr.equals(customerList[2].getFirstName())
&& pinVerifyStr.equals(customerList[2].getPin())) {
textArea.append("Customer: " + customerList[2].getFirstName()
+ " " + customerList[2].getLastName() + "\nAccount: "
+ customerList[2].getAccountType() + "\nBalance: "
+ formatDecimal.format(customerList[2].getBalance()));
if (nameVerifyStr.equals(customerList[3].getFirstName())
&& pinVerifyStr.equals(customerList[3].getPin())) {
textArea.append("Customer: " + customerList[3].getFirstName()
+ " " + customerList[3].getLastName() + "\nAccount: "
+ customerList[3].getAccountType() + "\nBalance: "
+ formatDecimal.format(customerList[3].getBalance()));
if (nameVerifyStr.equals(customerList[4].getFirstName())
&& pinVerifyStr.equals(customerList[4].getPin())) {
textArea.append("\nCustomer: " + customerList[4].getFirstName()
+ " " + customerList[4].getLastName() + "\nAccount: "
+ customerList[4].getAccountType() + "\nBalance: "
+ formatDecimal.format(customerList[4].getBalance()));
if (nameVerifyStr.equals(customerList[5].getFirstName())
&& pinVerifyStr.equals(customerList[5].getPin())) {
textArea.append("\nCustomer: " + customerList[5].getFirstName()
+ " " + customerList[5].getLastName() + "\nAccount: "
+ customerList[5].getAccountType() + "\nBalance: "
+ formatDecimal.format(customerList[5].getBalance()));
if (nameVerifyStr.equals(customerList[6].getFirstName())
&& pinVerifyStr.equals(customerList[6].getPin())) {
textArea.append("\nCustomer: " + customerList[6].getFirstName()
+ " " + customerList[6].getLastName() + "\nAccount: "
+ customerList[6].getAccountType() + "\nBalance: "
+ formatDecimal.format(customerList[6].getBalance()));
if (nameVerifyStr.equals(customerList[7].getFirstName())
&& pinVerifyStr.equals(customerList[7].getPin())) {
textArea.append("\nCustomer: " + customerList[7].getFirstName()
+ " " + customerList[7].getLastName() + "\nAccount: "
+ customerList[7].getAccountType() + "\nBalance: "
+ formatDecimal.format(customerList[7].getBalance()));
if (nameVerifyStr.equals(customerList[8].getFirstName())
&& pinVerifyStr.equals(customerList[8].getPin())) {
textArea.append("\nCustomer: " + customerList[8].getFirstName()
+ " " + customerList[8].getLastName() + "\nAccount: "
+ customerList[8].getAccountType() + "\nBalance: "
+ formatDecimal.format(customerList[8].getBalance()));
if (nameVerifyStr.equals(customerList[9].getFirstName())
&& pinVerifyStr.equals(customerList[9].getPin())) {
textArea.append("\nCustomer: " + customerList[9].getFirstName()
+ " " + customerList[9].getLastName() + "\nAccount: "
+ customerList[9].getAccountType() + "\nBalance: "
+ formatDecimal.format(customerList[9].getBalance()));
textArea.append("\n===========================");
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//depending on which radio button is selected
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if (sourceObject == depositWithdrawButton) {
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String pinVerifyStr = JOptionPane.showInputDialog("Pin Number: ");
if (depositRadioButton.isSelected()) {
String depositAmountStr = JOptionPane
.showInputDialog("Deposit Amount: ");
double depositAmountDouble = Double
.parseDouble(depositAmountStr);
if (nameVerifyStr.equals(customerList[0].getFirstName())
&& pinVerifyStr.equals(customerList[0].getPin())) {
double balanceDouble = customerList[0].getBalance();
balanceDouble += depositAmountDouble;
customerList[0].setValues(customerList[0].getFirstName(),
customerList[0].getLastName(), customerList[0]
.getPin(),
customerList[0].getAccountType(), balanceDouble);
textArea.append("\nCustomer: "
+ customerList[0].getFirstName() + " "
+ customerList[0].getLastName() + "\nAccount: "
+ customerList[0].getAccountType() + "\nPin: "
+ customerList[0].getPin() + "\nChanges: +"
+ depositAmountDouble + "\nBalance: "
+ formatDecimal.format(balanceDouble));
if (nameVerifyStr.equals(customerList[1].getFirstName())
&& pinVerifyStr.equals(customerList[1].getPin())) {
double balanceDouble = customerList[1].getBalance();
balanceDouble += depositAmountDouble;
customerList[1].setValues(customerList[1].getFirstName(),
customerList[1].getLastName(), customerList[1]
.getPin(),
customerList[1].getAccountType(), balanceDouble);
textArea.append("\nCustomer: "
+ customerList[1].getFirstName() + " "
+ customerList[1].getLastName() + "\nAccount: "
+ customerList[1].getAccountType() + "\nPin: "
+ customerList[1].getPin() + "\nChanges: +"
+ depositAmountDouble + "\nBalance: "
+ formatDecimal.format(balanceDouble));
if (nameVerifyStr.equals(customerList[2].getFirstName())
&& pinVerifyStr.equals(customerList[2].getPin())) {
double balanceDouble = customerList[2].getBalance();
balanceDouble += depositAmountDouble;
customerList[2].setValues(customerList[2].getFirstName(),
customerList[2].getLastName(), customerList[2]
.getPin(),
customerList[2].getAccountType(), balanceDouble);
textArea.append("\nCustomer: "
+ customerList[2].getFirstName() + " "
+ customerList[2].getLastName() + "\nAccount: "
+ customerList[2].getAccountType() + "\nPin: "
+ customerList[2].getPin() + "\nChanges: +"
+ depositAmountDouble + "\nBalance: "
+ formatDecimal.format(balanceDouble));
if (nameVerifyStr.equals(customerList[3].getFirstName())
&& pinVerifyStr.equals(customerList[3].getPin())) {
double balanceDouble = customerList[3].getBalance();
balanceDouble += depositAmountDouble;
customerList[3].setValues(customerList[3].getFirstName(),
customerList[3].getLastName(), customerList[3]
.getPin(),
customerList[3].getAccountType(), balanceDouble);
textArea.append("\nCustomer: "
+ customerList[3].getFirstName() + " "
+ customerList[3].getLastName() + "\nAccount: "
+ customerList[3].getAccountType() + "\nPin: "
+ customerList[3].getPin() + "\nChanges: +"
+ depositAmountDouble + "\nBalance: "
+ formatDecimal.format(balanceDouble));
if (nameVerifyStr.equals(customerList[4].getFirstName())
&& pinVerifyStr.equals(customerList[4].getPin())) {
double balanceDouble = customerList[4].getBalance();
balanceDouble += depositAmountDouble;
customerList[4].setValues(customerList[4].getFirstName(),
customerList[4].getLastName(), customerList[4]
.getPin(),
customerList[4].getAccountType(), balanceDouble);
textArea.append("\nCustomer: "
+ customerList[4].getFirstName() + " "
+ customerList[4].getLastName() + "\nAccount: "
+ customerList[4].getAccountType() + "\nPin: "
+ customerList[4].getPin() + "\nChanges: +"
+ depositAmountDouble + "\nBalance: "
+ formatDecimal.format(balanceDouble));
if (nameVerifyStr.equals(customerList[5].getFirstName())
&& pinVerifyStr.equals(customerList[5].getPin())) {
double balanceDouble = customerList[5].getBalance();
balanceDouble += depositAmountDouble;
customerList[5].setValues(customerList[5].getFirstName(),
customerList[5].getLastName(), customerList[5]
.getPin(),
customerList[5].getAccountType(), balanceDouble);
textArea.append("\nCustomer: "
+ customerList[5].getFirstName() + " "
+ customerList[5].getLastName() + "\nAccount: "
+ customerList[5].getAccountType() + "\nPin: "
+ customerList[5].getPin() + "\nChanges: +"
+ depositAmountDouble + "\nBalance: "
+ formatDecimal.format(balanceDouble));
if (nameVerifyStr.equals(customerList[6].getFirstName())
&& pinVerifyStr.equals(customerList[6].getPin())) {
double balanceDouble = customerList[6].getBalance();
balanceDouble += depositAmountDouble;
customerList[6].setValues(customerList[6].getFirstName(),
customerList[6].getLastName(), customerList[6]
.getPin(),
customerList[6].getAccountType(), balanceDouble);
textArea.append("\nCustomer: "
+ customerList[6].getFirstName() + " "
+ customerList[6].getLastName() + "\nAccount: "
+ customerList[6].getAccountType() + "\nPin: "
+ customerList[6].getPin() + "\nChanges: +"
+ depositAmountDouble + "\nBalance: "
+ formatDecimal.format(balanceDouble));
if (nameVerifyStr.equals(customerList[7].getFirstName())
&& pinVerifyStr.equals(customerList[7].getPin())) {
double balanceDouble = customerList[7].getBalance();
balanceDouble += depositAmountDouble;
customerList[7].setValues(customerList[7].getFirstName(),
customerList[7].getLastName(), customerList[7]
.getPin(),
customerList[7].getAccountType(), balanceDouble);
textArea.append("\nCustomer: "
+ customerList[7].getFirstName() + " "
+ customerList[7].getLastName() + "\nAccount: "
+ customerList[7].getAccountType() + "\nPin: "
+ customerList[7].getPin() + "\nChanges: +"
+ depositAmountDouble + "\nBalance: "
+ formatDecimal.format(balanceDouble));
if (nameVerifyStr.equals(customerList[8].getFirstName())
&& pinVerifyStr.equals(customerList[8].getPin())) {
double balanceDouble = customerList[8].getBalance();
balanceDouble += depositAmountDouble;
customerList[8].setValues(customerList[8].getFirstName(),
customerList[8].getLastName(), customerList[8]
.getPin(),
customerList[8].getAccountType(), balanceDouble);
textArea.append("\nCustomer: "
+ customerList[8].getFirstName() + " "
+ customerList[8].getLastName() + "\nAccount: "
+ customerList[8].getAccountType() + "\nPin: "
+ customerList[8].getPin() + "\nChanges: +"
+ depositAmountDouble + "\nBalance: "
+ formatDecimal.format(balanceDouble));
if (nameVerifyStr.equals(customerList[9].getFirstName())
&& pinVerifyStr.equals(customerList[9].getPin())) {
double balanceDouble = customerList[9].getBalance();
balanceDouble += depositAmountDouble;
customerList[9].setValues(customerList[9].getFirstName(),
customerList[9].getLastName(), customerList[9]
.getPin(),
customerList[9].getAccountType(), balanceDouble);
textArea.append("\nCustomer: "
+ customerList[9].getFirstName() + " "
+ customerList[9].getLastName() + "\nAccount: "
+ customerList[9].getAccountType() + "\nPin: "
+ customerList[9].getPin() + "\nChanges: +"
+ depositAmountDouble + "\nBalance: "
+ formatDecimal.format(balanceDouble));
if (withdrawRadioButton.isSelected()) {
String withdrawAmountStr = JOptionPane
.showInputDialog("Withdraw Amount: ");
double withdrawAmountDouble = Double
.parseDouble(withdrawAmountStr);
double chargeDouble;
if (withdrawAmountDouble > 2000) {
chargeDouble = 0.75;
} else if (withdrawAmountDouble > 750) {
chargeDouble = 0.50;
} else {
chargeDouble = 0;
if (nameVerifyStr.equals(customerList[0].getFirstName())
&& pinVerifyStr.equals(customerList[0].getPin())) {
double balanceDouble = customerList[0].getBalance();
if (withdrawAmountDouble + chargeDouble > balanceDouble) {
JOptionPane.showMessageDialog(null,
"Withdraw Exceeds Balance!");
} else {
balanceDouble -= (withdrawAmountDouble + chargeDouble);
customerList[0].setValues(customerList[0].getFirstName(),
customerList[0].getLastName(), customerList[0]
.getPin(),
customerList[0].getAccountType(), balanceDouble);
textArea.append("\nCustomer: "
+ customerList[0].getFirstName() + " "
+ customerList[0].getLastName() + "\nAccount: "
+ customerList[0].getAccountType() + "\nPin: "
+ customerList[0].getPin() + "\nChanges: -"
+ withdrawAmountDouble + "\nBalance: "
+ formatDecimal.format(balanceDouble));
if (nameVerifyStr.equals(customerList[1].getFirstName())
&& pinVerifyStr.equals(customerList[1].getPin())) {
double balanceDouble = customerList[1].getBalance();
if (withdrawAmountDouble + chargeDouble > balanceDouble) {
JOptionPane.showMessageDialog(null,
"Withdraw Exceeds Balance!");
} else {
balanceDouble -= (withdrawAmountDouble + chargeDouble);
customerList[1].setValues(customerList[1].getFirstName(),
customerList[1].getLastName(), customerList[1]
.getPin(),
customerList[1].getAccountType(), balanceDouble);
textArea.append("\nCustomer: "
+ customerList[1].getFirstName() + " "
+ customerList[1].getLastName() + "\nAccount: "
+ customerList[1].getAccountType() + "\nPin: "
+ customerList[1].getPin() + "\nChanges: -"
+ withdrawAmountDouble + "\nBalance: "
+ formatDecimal.format(balanceDouble));
if (nameVerifyStr.equals(customerList[2].getFirstName())
&& pinVerifyStr.equals(customerList[2].getPin())) {
double balanceDouble = customerList[2].getBalance();
if (withdrawAmountDouble + chargeDouble > balanceDouble) {
JOptionPane.showMessageDialog(null,
"Withdraw Exceeds Balance!");
} else {
balanceDouble -= (withdrawAmountDouble + chargeDouble);
customerList[2].setValues(customerList[2].getFirstName(),
customerList[2].getLastName(), customerList[2]
.getPin(),
customerList[2].getAccountType(), balanceDouble);
textArea.append("\nCustomer: "
+ customerList[2].getFirstName() + " "
+ customerList[2].getLastName() + "\nAccount: "
+ customerList[2].getAccountType() + "\nPin: "
+ customerList[2].getPin() + "\nChanges: -"
+ withdrawAmountDouble + "\nBalance: "
+ formatDecimal.format(balanceDouble));
if (nameVerifyStr.equals(customerList[3].getFirstName())
&& pinVerifyStr.equals(customerList[3].getPin())) {
double balanceDouble = customerList[3].getBalance();
if (withdrawAmountDouble + chargeDouble > balanceDouble) {
JOptionPane.showMessageDialog(null,
"Withdraw Exceeds Balance!");
} else {
balanceDouble -= (withdrawAmountDouble + chargeDouble);
customerList[3].setValues(customerList[3].getFirstName(),
customerList[3].getLastName(), customerList[3]
.getPin(),
customerList[3].getAccountType(), balanceDouble);
textArea.append("\nCustomer: "
+ customerList[3].getFirstName() + " "
+ customerList[3].getLastName() + "\nAccount: "
+ customerList[3].getAccountType() + "\nPin: "
+ customerList[3].getPin() + "\nChanges: -"
+ withdrawAmountDouble + "\nBalance: "
+ formatDecimal.format(balanceDouble));
if (nameVerifyStr.equals(customerList[4].getFirstName())
&& pinVerifyStr.equals(customerList[4].getPin())) {
double balanceDouble = customerList[4].getBalance();
if (withdrawAmountDouble + chargeDouble > balanceDouble) {
JOptionPane.showMessageDialog(null,
"Withdraw Exceeds Balance!");
} else {
balanceDouble -= (withdrawAmountDouble + chargeDouble);
customerList[4].setValues(customerList[4].getFirstName(),
customerList[4].getLastName(), customerList[4]
.getPin(),
customerList[4].getAccountType(), balanceDouble);
textArea.append("\nCustomer: "
+ customerList[4].getFirstName() + " "
+ customerList[4].getLastName() + "\nAccount: "
+ customerList[4].getAccountType() + "\nPin: "
+ customerList[4].getPin() + "\nChanges: -"
+ withdrawAmountDouble + "\nBalance: "
+ formatDecimal.format(balanceDouble));
if (nameVerifyStr.equals(customerList[5].getFirstName())
&& pinVerifyStr.equals(customerList[5].getPin())) {
double balanceDouble = customerList[5].getBalance();
if (withdrawAmountDouble + chargeDouble > balanceDouble) {
JOptionPane.showMessageDialog(null,
"Withdraw Exceeds Balance!");
} else {
balanceDouble -= (withdrawAmountDouble + chargeDouble);
customerList[5].setValues(customerList[5].getFirstName(),
customerList[5].getLastName(), customerList[5]
.getPin(),
customerList[5].getAccountType(), balanceDouble);
textArea.append("\nCustomer: "
+ customerList[5].getFirstName() + " "
+ customerList[5].getLastName() + "\nAccount: "
+ customerList[5].getAccountType() + "\nPin: "
+ customerList[5].getPin() + "\nChanges: -"
+ withdrawAmountDouble + "\nBalance: "
+ formatDecimal.format(balanceDouble));
if (nameVerifyStr.equals(customerList[6].getFirstName())
&& pinVerifyStr.equals(customerList[6].getPin())) {
double balanceDouble = customerList[6].getBalance();
if (withdrawAmountDouble + chargeDouble > balanceDouble) {
JOptionPane.showMessageDialog(null,
"Withdraw Exceeds Balance!");
} else {
balanceDouble -= (withdrawAmountDouble + chargeDouble);
customerList[6].setValues(customerList[6].getFirstName(),
customerList[6].getLastName(), customerList[6]
.getPin(),
customerList[6].getAccountType(), balanceDouble);
textArea.append("\nCustomer: "
+ customerList[6].getFirstName() + " "
+ customerList[6].getLastName() + "\nAccount: "
+ customerList[6].getAccountType() + "\nPin: "
+ customerList[6].getPin() + "\nChanges: -"
+ withdrawAmountDouble + "\nBalance: "
+ formatDecimal.format(balanceDouble));
if (nameVerifyStr.equals(customerList[7].getFirstName())
&& pinVerifyStr.equals(customerList[7].getPin())) {
double balanceDouble = customerList[7].getBalance();
if (withdrawAmountDouble + chargeDouble > balanceDouble) {
JOptionPane.showMessageDialog(null,
"Withdraw Exceeds Balance!");
} else {
balanceDouble -= (withdrawAmountDouble + chargeDouble);
customerList[7].setValues(customerList[7].getFirstName(),
customerList[7].getLastName(), customerList[7]
.getPin(),
customerList[7].getAccountType(), balanceDouble);
textArea.append("\nCustomer: "
+ customerList[7].getFirstName() + " "
+ customerList[7].getLastName() + "\nAccount: "
+ customerList[7].getAccountType() + "\nPin: "
+ customerList[7].getPin() + "\nChanges: -"
+ withdrawAmountDouble + "\nBalance: "
+ formatDecimal.format(balanceDouble));
if (nameVerifyStr.equals(customerList[8].getFirstName())
&& pinVerifyStr.equals(customerList[8].getPin())) {
double balanceDouble = customerList[8].getBalance();
if (withdrawAmountDouble + chargeDouble > balanceDouble) {
JOptionPane.showMessageDialog(null,
"Withdraw Exceeds Balance!");
} else {
balanceDouble -= (withdrawAmountDouble + chargeDouble);
customerList[8].setValues(customerList[8].getFirstName(),
customerList[8].getLastName(), customerList[8]
.getPin(),
customerList[8].getAccountType(), balanceDouble);
textArea.append("\nCustomer: "
+ customerList[8].getFirstName() + " "
+ customerList[8].getLastName() + "\nAccount: "
+ customerList[8].getAccountType() + "\nPin: "
+ customerList[8].getPin() + "\nChanges: -"
+ withdrawAmountDouble + "\nBalance: "
+ formatDecimal.format(balanceDouble));
if (nameVerifyStr.equals(customerList[9].getFirstName())
&& pinVerifyStr.equals(customerList[9].getPin())) {
double balanceDouble = customerList[9].getBalance();
if (withdrawAmountDouble + chargeDouble > balanceDouble) {
JOptionPane.showMessageDialog(null,
"Withdraw Exceeds Balance!");
} else {
balanceDouble -= (withdrawAmountDouble + chargeDouble);
customerList[9].setValues(customerList[9].getFirstName(),
customerList[9].getLastName(), customerList[9]
.getPin(),
customerList[9].getAccountType(), balanceDouble);
textArea.append("\nCustomer: "
+ customerList[9].getFirstName() + " "
+ customerList[9].getLastName() + "\nAccount: "
+ customerList[9].getAccountType() + "\nPin: "
+ customerList[9].getPin() + "\nChanges: -"
+ withdrawAmountDouble + "\nBalance: "
+ formatDecimal.format(balanceDouble));
}Any suggestions would be much appreciated
- Thanks - GoOsE(1) thanks for the wall of code.
(2) thanks for providing readers with the compilation errors.
(3) why are you using camelcase for Class names?
[*READ THIS*|http://mindprod.com/jgloss/abstract.html]
the errors seem very straight forward to me:
bankPresentation.java:34: cannot find symbol
symbol : class bankSummary
location: class bankPresentation
bankSummary customerList[] = new bankSummary[10];
^
bankPresentation.java:34: cannot find symbol
symbol : class bankSummary
location: class bankPresentation
bankSummary customerList[] = new bankSummary[10];
^
bankPresentation.java:38: bankPresentation is abstract; cannot be instantiated
bankPresentation frame = new bankPresentation();
^
bankPresentation.java:103: abstract methods cannot have a body <---- PAY ATTENTION
abstract void assignArray() {
^
4 errors
Tool completed with exit code 1 -
NullPointerException on JVM startup when changing Class.getDeclaredField()
On any JVM starting with 1.5 and later the included test case causes this exception on startup:
java.lang.NullPointerException
at java.util.Hashtable.put(Hashtable.java:394)
at java.lang.System.initProperties(Native Method)
at java.lang.System.initializeSystemClass(System.java:1072)
The test case involves overriding Class.getDeclaredField() via -Xbootclasspath/p. Originally the bug came out when using Instrumentation.redefineClasses().
To run the test case:
1) Download and unzip from [http://ngra.de/gdm-test.zip]
2) Run "java -cp asm-all-3.1.jar:gdm.jar Install", this will generate a gdm-boot.jar file.
3) Run "java -Xbootclasspath/p:gdm.jar:gdm-boot.jar Test", this should produce the error.
The test cases adds one method call before ARETURN instruction in Class. getDeclaredField(). The call is INVOKESTATIC Test.test()V.
Does anyone know if it's a known bug and if there are any workarounds for this? The same bug manifests in Instrumentation.redefineClasses() by messing up the constant pool when the getDeclaredField() is changedApparently the problem was that in Java 5+ there is a AtomicReferenceFieldUpdaterImpl, which is accessed from System.initializeClass() on JVM startup and which calls Class.getDeclaredField(). Since at that point the proper classloading is not set up yet, trying to access a class outside rt.jar causes a ClassNoDefFoundError cascading upwards to the NPE we get. The fix is to check the sun.misc.VM.isBooted() flag to be sure that class loading is allowed, otherwise skipping the injected code. Hope this can help someone :)
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