Problem with JFormattedTextField
Hi,
I Want to set Max length of text in JFormattedTextField..
I've tried to extend PlainDocument and override insertString and updateString, but it doesn't work.
How can do it.
Thanks.
I've solved the problem with a subclass of DocumentFilter.
Overriding the following methods : insertString,remove and update
Similar Messages
-
Selection problem with JFormattedTextField
I encounter a problem to select the content of a JFormattedTextField.
Here is a class for a dialog containing 2 JFormattedTextFields :
* Created on 7 juin 2005
* To change the template for this generated file go to
* Window>Preferences>Java>Code Generation>Code and Comments
package cimpa.smartndtkit.dialog;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.FocusAdapter;
import java.awt.event.FocusEvent;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.text.DecimalFormat;
import javax.swing.JFrame;
import javax.swing.JTextField;
import cimpa.smartndtkit.utilities.Texts;
import cimpa.smartndtkit.utilities.basic_classes.MyButton;
import cimpa.smartndtkit.utilities.basic_classes.MyFormattedTextField;
import cimpa.smartndtkit.utilities.basic_classes.MyLabel;
import cimpa.smartndtkit.utilities.basic_classes.MyPanel;
* @author st08051
* To change the template for this generated type comment go to
* Window>Preferences>Java>Code Generation>Code and Comments
public class ChangePaletteLimitsDialog extends MyDialog {
private boolean isOK = false;
private float minValue, maxValue;
private MyButton bOK, bCancel;
private MyFormattedTextField txtMin, txtMax;
public ChangePaletteLimitsDialog(JFrame parent, float minValue, float maxValue){
super(parent, "Modification des limites", true);
setResizable(false);
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
getContentPane().setLayout(new GridBagLayout());
/** Constantes */
Insets leftComponentInsets = new Insets(15,30,0,5);
Insets rightComponentInsets = new Insets(15,5,0,30);
Insets buttonsInsets = new Insets(8,5,8,5);
int txtWidth = 60;
int txtHeight = 22;
DecimalFormat format = Texts.formatFactory("###0.###");
/** Cr�ation des composants */
MyLabel labelMin = new MyLabel("Valeur minimale :");
txtMin = new MyFormattedTextField(format);
txtMin.setHorizontalAlignment(JTextField.RIGHT);
txtMin.setAlignmentX(JTextField.RIGHT_ALIGNMENT);
txtMin.setSizes(txtWidth, txtHeight);
txtMin.setText(""+minValue);
// txtMin.setValue(new Float(minValue));
txtMin.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent ke) {
keyPressed_actionPerformed(ke);
txtMin.addFocusListener(new FocusAdapter() {
public void focusGained(FocusEvent arg0) {
txtMin.selectAll();
// public void focusLost(FocusEvent arg0) {
// txtMin.addActionListener(new ActionListener() {
// public void actionPerformed(ActionEvent arg0) {
// txtMin.selectAll();
MyLabel labelMax = new MyLabel("Valeur maximale :");
txtMax = new MyFormattedTextField(format);
txtMax.setHorizontalAlignment(JTextField.RIGHT);
txtMax.setAlignmentX(JTextField.RIGHT_ALIGNMENT);
txtMax.setSizes(txtWidth, txtHeight);
txtMax.setText(""+maxValue);
// txtMax.setValue(new Float(maxValue));
txtMax.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent ke) {
keyPressed_actionPerformed(ke);
txtMax.addFocusListener(new FocusAdapter() {
public void focusGained(FocusEvent arg0) {
txtMax.selectAll();
// public void focusLost(FocusEvent arg0) {
// txtMax.addActionListener(new ActionListener() {
// public void actionPerformed(ActionEvent arg0) {
// txtMax.selectAll();
MyPanel panel = new MyPanel();
bOK = new MyButton("OK");
bOK.setSizes(60,25);
bOK.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent ae) {
bOK_actionPerformed();
bCancel = new MyButton("Annuler");
bCancel.setSizes(60,25);
bCancel.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent ae) {
bCancel_actionPerformed();
/** Contraintes */
GridBagConstraints constraints = new GridBagConstraints();
constraints.anchor = GridBagConstraints.CENTER;
/** Agencement des composants */
constraints.gridx = 1;
constraints.gridy = 0;
constraints.gridwidth = 2;
constraints.insets = leftComponentInsets;
getContentPane().add(labelMin, constraints);
constraints.gridx = 3;
constraints.insets = rightComponentInsets;
getContentPane().add(txtMin, constraints);
constraints.gridx = 1;
constraints.gridy = 1;
constraints.insets = leftComponentInsets;
getContentPane().add(labelMax, constraints);
constraints.gridx = 3;
constraints.insets = rightComponentInsets;
getContentPane().add(txtMax, constraints);
constraints.gridx = 0;
constraints.gridy = 0;
constraints.gridwidth = 1;
constraints.insets = buttonsInsets;
panel.add(bOK, constraints);
constraints.gridx = 1;
panel.setLayout(new GridBagLayout());
panel.add(bCancel, constraints);
constraints.gridx = 0;
constraints.gridy = 3;
constraints.gridwidth = 6;
constraints.anchor = GridBagConstraints.CENTER;
getContentPane().add(panel, constraints);
this.pack();
setLocationRelativeTo(parent);
txtMin.requestFocus();
// getRootPane().setDefaultButton(bOK);
setVisible(true);
* @return
public boolean isOK() {
return isOK;
public void bOK_actionPerformed(){
isOK=true;
minValue = new Float(txtMin.getText()).floatValue();
maxValue = new Float(txtMax.getText()).floatValue();
dispose(); //st11870 : � faire en dehors ou l�?
public void bCancel_actionPerformed(){
escapeActionPerformed();
private void keyPressed_actionPerformed(KeyEvent ke) {
if (ke.getKeyChar() == KeyEvent.VK_ESCAPE) {
escapeActionPerformed();
else if (ke.getKeyChar() == KeyEvent.VK_ENTER) {
bOK_actionPerformed();
protected void escapeActionPerformed() {
isOK=false;
dispose();
public float getMaxValue() {
return maxValue;
public float getMinValue() {
return minValue;
}The problem is that the first time I pass through a textfield, it selects its content. But once, it has been selected, it can't be selected anymore...
And if I make a setValue() during the initialization, it cannot be selected at all!
Does anyone know how to fix this?
Thanks!Should work now...
package cimpa.smartndtkit.dialog;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.FocusAdapter;
import java.awt.event.FocusEvent;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.text.DecimalFormat;
import javax.swing.JFrame;
import javax.swing.JTextField;
public class ChangePaletteLimitsDialog extends JDialog {
private boolean isOK = false;
private float minValue, maxValue;
private JButton bOK, bCancel;
private JFormattedTextField txtMin, txtMax;
public ChangePaletteLimitsDialog(JFrame parent, float minValue, float maxValue){
super(parent, "Modification des limites", true);
setResizable(false);
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
getContentPane().setLayout(new GridBagLayout());
/** Constantes */
Insets leftComponentInsets = new Insets(15,30,0,5);
Insets rightComponentInsets = new Insets(15,5,0,30);
Insets buttonsInsets = new Insets(8,5,8,5);
int txtWidth = 60;
int txtHeight = 22;
DecimalFormat format = formatFactory("###0.###");
/** Cr�ation des composants */
JLabel labelMin = new JLabel("Valeur minimale :");
txtMin = new JFormattedTextField(format);
txtMin.setHorizontalAlignment(JTextField.RIGHT);
txtMin.setAlignmentX(JTextField.RIGHT_ALIGNMENT);
txtMin.setSize(txtWidth, txtHeight);
txtMin.setText(""+minValue);
// txtMin.setValue(new Float(minValue));
txtMin.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent ke) {
keyPressed_actionPerformed(ke);
txtMin.addFocusListener(new FocusAdapter() {
public void focusGained(FocusEvent arg0) {
txtMin.selectAll();
// public void focusLost(FocusEvent arg0) {
// txtMin.addActionListener(new ActionListener() {
// public void actionPerformed(ActionEvent arg0) {
// txtMin.selectAll();
JLabel labelMax = new JLabel("Valeur maximale :");
txtMax = new JFormattedTextField(format);
txtMax.setHorizontalAlignment(JTextField.RIGHT);
txtMax.setAlignmentX(JTextField.RIGHT_ALIGNMENT);
txtMax.setSize(txtWidth, txtHeight);
txtMax.setText(""+maxValue);
// txtMax.setValue(new Float(maxValue));
txtMax.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent ke) {
keyPressed_actionPerformed(ke);
txtMax.addFocusListener(new FocusAdapter() {
public void focusGained(FocusEvent arg0) {
txtMax.selectAll();
// public void focusLost(FocusEvent arg0) {
// txtMax.addActionListener(new ActionListener() {
// public void actionPerformed(ActionEvent arg0) {
// txtMax.selectAll();
JPanel panel = new JPanel();
bOK = new JButton("OK");
bOK.setSize(60,25);
bOK.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent ae) {
bOK_actionPerformed();
bCancel = new JButton("Annuler");
bCancel.setSize(60,25);
bCancel.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent ae) {
bCancel_actionPerformed();
/** Contraintes */
GridBagConstraints constraints = new GridBagConstraints();
constraints.anchor = GridBagConstraints.CENTER;
/** Agencement des composants */
constraints.gridx = 1;
constraints.gridy = 0;
constraints.gridwidth = 2;
constraints.insets = leftComponentInsets;
getContentPane().add(labelMin, constraints);
constraints.gridx = 3;
constraints.insets = rightComponentInsets;
getContentPane().add(txtMin, constraints);
constraints.gridx = 1;
constraints.gridy = 1;
constraints.insets = leftComponentInsets;
getContentPane().add(labelMax, constraints);
constraints.gridx = 3;
constraints.insets = rightComponentInsets;
getContentPane().add(txtMax, constraints);
constraints.gridx = 0;
constraints.gridy = 0;
constraints.gridwidth = 1;
constraints.insets = buttonsInsets;
panel.add(bOK, constraints);
constraints.gridx = 1;
panel.setLayout(new GridBagLayout());
panel.add(bCancel, constraints);
constraints.gridx = 0;
constraints.gridy = 3;
constraints.gridwidth = 6;
constraints.anchor = GridBagConstraints.CENTER;
getContentPane().add(panel, constraints);
this.pack();
setLocationRelativeTo(parent);
txtMin.requestFocus();
// getRootPane().setDefaultButton(bOK);
setVisible(true);
* @return
public boolean isOK() {
return isOK;
public void bOK_actionPerformed(){
isOK=true;
minValue = new Float(txtMin.getText()).floatValue();
maxValue = new Float(txtMax.getText()).floatValue();
dispose();
public void bCancel_actionPerformed(){
escapeActionPerformed();
private void keyPressed_actionPerformed(KeyEvent ke) {
if (ke.getKeyChar() == KeyEvent.VK_ESCAPE) {
escapeActionPerformed();
else if (ke.getKeyChar() == KeyEvent.VK_ENTER) {
bOK_actionPerformed();
protected void escapeActionPerformed() {
isOK=false;
dispose();
public float getMaxValue() {
return maxValue;
public float getMinValue() {
return minValue;
public static DecimalFormat formatFactory(String pattern){
DecimalFormat format = new DecimalFormat(pattern);
DecimalFormatSymbols dfs = new DecimalFormatSymbols();
dfs.setDecimalSeparator('.');
format.setDecimalFormatSymbols(dfs);
return format;
} -
More problem with JFormattedTextField
Here is the code where I want size and input validation for JFormattedTextField
MaskFormatter f10=new MaskFormatter("***************");
f10.setValidCharacters("0123456789");
t4= new JFormattedTextField(f10);
It's behaving in funny way. It allows me only specfied no of characters(15 here) and only nos. But after entering nos and when it changes the focus, the entered data is disappearing. What could be the problem?Interesting Problem,
Watching for result. -
Big problem with JFormattedTextField.
When I use a JFormattedTextField to receive on input just letters when the JFormattedTextField loses focus it just clear the field! Why that?
try {
MaskFormatter mask = new MaskFormatter("????????????????????");
mask.setValidCharacters("abcdefghijklmnopqrstuvxwyzABCDEFGHIJKLMNOPQRSTUVXWYZ");
nameText = new JFormattedTextField(mask);
catch(ParseException pe) {
}When the JTextFormattedTextField loses the focus it gets empty. Why?
And I have another important question: Besides letters, I need to receive empty spaces on my JFormattetTextField. How can I set this on setValidCharacters method?
Thanks!You should be displaying a message when you handle an Exception.
If you need further help then you need to create a [url http://homepage1.nifty.com/algafield/sscce.html]Short, Self Contained, Compilable and Executable, Example Program (SSCCE) that demonstrates the incorrect behaviour, because I can't guess exactly what you are doing based on the information provided.
Don't forget to use the [url http://forum.java.sun.com/help.jspa?sec=formatting]Code Formatting Tags so the posted code retains its original formatting. -
Problems with MaskFormatter and JFormattedTextfield
Hi,
I'm new to the forum and Java programming so if anyone is willing to answer this query with a small degree of patience I would be immensely, humbly grateful!
I'll say firstly that I wrote the program in jdk1.4.2 then recompiled it in 1.6.0 in the vain hope that the problem would go a way, but no such luck.
Right, I'm using one Formatted textfield with a MaskFormatter on which I change the mask according to what information I want from the user:
class myFormatter extends MaskFormatter {
String key;
public void setMask(String k){
key = k;
if (key.equals("text")) {
try{
super.setMask("*************"); // for text, eg star names
super.setValidCharacters("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz\u0020");
}catch (java.text.ParseException e) {
System.err.println("Problem with formatting: " + e.getMessage());
System.exit(-1);
else if (key.equals("num")) {
try{
super.setMask("****#"); // for numbers 1-10000 eg frame num
super.setValidCharacters("0123456789\u0020");
}catch (java.text.ParseException e) {
System.err.println("Problem with formatting: " + e.getMessage());
System.exit(-1);
else if (key.equals("epoch")) try{
super.setMask("####.#"); // for epoch
super.setValueContainsLiteralCharacters(true);
}catch (java.text.ParseException e) {
System.err.println("Problem with formatting: " + e.getMessage());
System.exit(-1);
else if (key.equals("yna")) try{
super.setMask("L"); // for single lower case characters eg y/n/a
}catch (java.text.ParseException e) {
System.err.println("Problem with formatting: " + e.getMessage());
System.exit(-1);
else if (key.equals("coord")) try{
super.setMask("*## ## ##"); // for RA/Dec
super.setValueContainsLiteralCharacters(true);
super.setValidCharacters("0123456789+-\u0020");
}catch (java.text.ParseException e) {
System.err.println("Problem with formatting: " + e.getMessage());
System.exit(-1);
else if (key.equals("reset")) try{
super.setMask("*********************"); // accept anything
}catch (java.text.ParseException e) {
System.err.println("Problem with formatting: " + e.getMessage());
System.exit(-1);
else try{
super.setMask("********************"); // accept anything
}catch (java.text.ParseException e) {
System.err.println("Problem with formatting: " + e.getMessage());
System.exit(-1);
-----------------------------------------------------------------------------------------------------Ok, now I've only gotten as far as checking the implementation of the "epoch", "text", "yna" and "coord" keys. I've discovered two main problems:
1. The A, ? and H masks in MaskFormatter just simply did not work; the textfield would not let me enter anything, even when setting the valid the characters, hence having to use * for implementing the "text" key.
But most importantly:
2. The "coord" mask will not let me enter anything (example coordinates -32 44 55) and when I try (in particular press the backspace to start entering at the beginning of the ttextfield instead of the middle, where the cursor is put) I presented with this horrendous complaint from the compiler:
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at javax.swing.text.MaskFormatter.isLiteral(MaskFormatter.java:566)
at javax.swing.text.MaskFormatter.canReplace(MaskFormatter.java:711)
at javax.swing.text.DefaultFormatter.replace(DefaultFormatter.java:560)
at javax.swing.text.DefaultFormatter.replace(DefaultFormatter.java:533)
at javax.swing.text.DefaultFormatter$DefaultDocumentFilter.remove(DefaultFormatter.java:711)
at javax.swing.text.AbstractDocument.remove(AbstractDocument.java:573)
at javax.swing.text.DefaultEditorKit$DeletePrevCharAction.actionPerformed(DefaultEditorKit.java:1045)
at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1636)
at javax.swing.JComponent.processKeyBinding(JComponent.java:2844)
at javax.swing.JComponent.processKeyBindings(JComponent.java:2879)
at javax.swing.JComponent.processKeyEvent(JComponent.java:2807)
at java.awt.Component.processEvent(Component.java:5815)
at java.awt.Container.processEvent(Container.java:2058)
at java.awt.Component.dispatchEventImpl(Component.java:4410)
at java.awt.Container.dispatchEventImpl(Container.java:2116)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1848)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:693)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:958)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:830)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:657)
at java.awt.Component.dispatchEventImpl(Component.java:4282)
at java.awt.Container.dispatchEventImpl(Container.java:2116)
at java.awt.Window.dispatchEventImpl(Window.java:2429)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)
A NullPointerException??? I even tried priming the textfield by setting the value using formatTxt.setValue(format.stringToValue("+00 00 00")).
Does anyone have any ideas on this error (or how I can get around this without delving to much into other filtering classes)? Has anyone had similar problems with the MaskFormatter masks not accepting what they claim they do (I looked through the posts on the subject).
Thanking you in advance for you patience........Hi,
Thank you very much for your prompt reply.
I've done as you said - written a smaller program to test each mask. They don't work quite as I expected but you're right, each mask works fine, its changing the masks that's the problem. I wrote this to test it out:
public class testMask {
//Note: main() won't let u access object/variable methods if declared here
// GUI items to be globally accsessed:
JFrame MainWin;
JPanel panel, panel1;
JLabel question, answer;
JButton send, askQues, change;
JFormattedTextField formatTxt;
myFormatter format;
// I/O to be globally accessed:
String usrinput = null;
public static void main( String[] args ) {
testMask GUI = new testMask();
public testMask(){
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public synchronized void run() {
create();
}); // thread safe code to make sure that UI painting is not interrupted by events, possibly causing the UI to hang
public synchronized void create(){
//set look and feel of GUI
try {
} catch (Exception e) {
System.out.println("Error - Problem displaying window");
//initialise main window and set layout manager
MainWin = new JFrame("Test Masks");
MainWin.getContentPane().setLayout(new BorderLayout());
// initialise containers to go on MainWin
panel = createPanel();
MainWin.getContentPane().add(panel, BorderLayout.CENTER);
MainWin.pack();
MainWin.setSize(300,150);
MainWin.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
MainWin.setLocation(150, 150);
MainWin.setVisible(true);
public synchronized JPanel createPanel() {
JPanel panel1 = new JPanel();
panel1.setLayout(new GridLayout(3,1));
Border border = BorderFactory.createEtchedBorder();
panel1.setBorder(BorderFactory.createTitledBorder(border, " Test Panel "));
question = new JLabel("Please enter drive");
answer = new JLabel();
answer.setBorder(border);
panel1.add(question);
JPanel pane1 = new JPanel(new FlowLayout());
//------Set up formatted textfield for user input to be verified--------
format = createFormatter();
format.setMask("drive");
formatTxt = new JFormattedTextField(format);
formatTxt.setColumns(10);
send = new JButton(" Send ");
send.setBorder(BorderFactory.createBevelBorder(BevelBorder.RAISED));
send.addActionListener(new ActionListener(){
public synchronized void actionPerformed(ActionEvent e) {
try{
formatTxt.commitEdit();
} catch (java.text.ParseException exc) {
answer.setText("Problem with formatting: " + exc.getMessage());
return;
SwingUtilities.invokeLater(new Runnable() {
public synchronized void run() {
if (formatTxt.isEditValid()) {
usrinput = formatTxt.getText();
answer.setText(usrinput);
} else { answer.setText("Input not of valid format"); }
change = new JButton("Change mask");
change.setBorder(BorderFactory.createBevelBorder(BevelBorder.RAISED));
change.addActionListener(new ActionListener(){
public synchronized void actionPerformed(ActionEvent e) {
question.setText("Please enter coord in format ## ## ##");
format.setMask("coord");
pane1.add(formatTxt);
pane1.add(send);
pane1.add(change);
panel1.add(pane1);
panel1.add(answer);
return panel1;
protected myFormatter createFormatter() {
myFormatter formatter = new myFormatter();
return formatter;
class myFormatter extends MaskFormatter {
String key;
public void setMask(String k){
key = k;
if (key.equals("coord")) {
try{
super.setMask("*## ## ##"); // for disk drive
super.setValueContainsLiteralCharacters(true);
}catch (java.text.ParseException e) {
answer.setText("Problem with formatting: " + e.getMessage());
return;
} else if (key.equals("drive")) {
try{
super.setMask("L:"); // for disk drive
super.setValueContainsLiteralCharacters(true);
}catch (java.text.ParseException e) {
answer.setText("Problem with formatting: " + e.getMessage());
return;
} else {
try{
super.setMask("********************"); // accept anything
}catch (java.text.ParseException e) {
answer.setText("Problem with formatting: " + e.getMessage());
return;
}When I click on the "change" button, the textfield won't let me enter anything in, no matter what I change the mask from or to.
Does anyone have any idea how I can implement the mask change dynamically? The only thing I could think of was to somehow re-initalise the textfield then do a repaint, but I don't know how or if that would even work.
Thanking you again in anticipation,
Mellony -
Problem with PropertyChangeListener and JTextField
I'm having a problem with PropertyChangeListener and JTextField.
I can not seem to get the propertychange event to fire.
Anyone have any idea why the code below doesn't work?
* NewJFrame.java
* Created on May 15, 2005, 4:21 PM
import java.beans.*;
import javax.swing.*;
* @author wolfgray
public class NewJFrame extends javax.swing.JFrame
implements PropertyChangeListener {
/** Creates new form NewJFrame */
public NewJFrame() {
initComponents();
jTextField1.addPropertyChangeListener( this );
public void propertyChange(PropertyChangeEvent e) {
System.out.println(e);
/** 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.
private void initComponents() {
jTextField1 = new javax.swing.JTextField();
jScrollPane1 = new javax.swing.JScrollPane();
jFormattedTextField1 = new javax.swing.JFormattedTextField();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jTextField1.setText("jTextField1");
getContentPane().add(jTextField1, java.awt.BorderLayout.NORTH);
jFormattedTextField1.setText("jFormattedTextField1");
jScrollPane1.setViewportView(jFormattedTextField1);
getContentPane().add(jScrollPane1, java.awt.BorderLayout.CENTER);
pack();
* @param args the command line arguments
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new NewJFrame().setVisible(true);
// Variables declaration - do not modify
private javax.swing.JFormattedTextField jFormattedTextField1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTextField jTextField1;
// End of variables declaration
}If you want to listen to changes in the textfield's contents you should use a DocumentListener and not a PropertyChangeListener:
http://java.sun.com/docs/books/tutorial/uiswing/events/documentlistener.html
And please use [co[/i]de] tags when you are posting code (press the code button above the message window). -
Hi everyone,
I have been trying to get this GUI built from the ground up and I have encountered a problem with the GridBag(exception error that the fields being added can not be done. Also, my method main seems to be off track, I have a working program which the display fields have been modified to display object and everything else is the same except that I can not get the GUI to run.
The following is the code and any suggestions as to what I can do to get this going will be appreciated. Thank you.
import javax.swing.JLabel; /* displays text and images*/
import javax.swing.SwingConstants; /* common constants used with Swing*/
import javax.swing.Icon; /* interface used to manipulate images*/
import javax.swing.ImageIcon; /* loads images*/
import javax.swing.JOptionPane;
import java.util.*;
import java.io.PrintStream;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.text.*;
import javax.swing.JFrame;/* provides basic window features*/
import java.util.Arrays;
import javax.swing.ImageIcon.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.*;
public class FinalInventoryGUI extends JFrame
{//Private variables.
private GridBagLayout layout = new GridBagLayout();
private GridBagConstraints constraints = new GridBagConstraints();
//Private data from main program
private String productName;
private String itmeNumber;
private double unitPrice;
private int unitStock;
private double productValue;
private double inventoryValue;
private double reStkfee;
//Declaration of the JLabels.
private JLabel logoLabel;
private JLabel productNameLabel;
private JLabel itemNumberLabel;
private JLabel unitPriceLabel;
private JLabel unitStockLabel;
private JLabel productValueLabel;
private JLabel InventoryValueLabel;
private JLabel reStkfeeLabel;
//Declaration of the text Fields for data Entry.
private JTextField productNameText;
private JTextField itemNumberText;
private JTextField unitPriceText;
private JTextField unitStockText;
private JTextField productValueText;
private JTextField inventoryValueText;
private JTextField reStkfeeText;
private JTextField titleText;
//Declaration of the JButtons for user interface.
private JButton first;//To move to first element in the array.
private JButton next;//To move to next element in the array.
private JButton previous;//To move to next element in the array.
private JButton lastButton;//To move to the first element in the array.
private JButton addButton;//To add a product to the array.
private JButton modifyButton;//To modify an element in the array.
private JButton deleteButton;//To remove a product from the array.
private JButton saveButton;//To save the array elements to C:\.
private JButton searchButton;//To search for an element in the array.
private Product products[];//Declaration of array product[] for storing entries.
private int NumOfProducts;//Declaration of the variable defining the number of products.
private int Index=0;//Setting the counter index to initiate at "0".
//Constants
private final static int LOGO_WIDTH = 4;
private final static int LOGO_HEIGHT = 4;
private final static int LABEL_WIDTH = 1;
private final static int LABEL_HEIGHT = 1;
private final static int TEXT_WIDTH = LOGO_WIDTH-LABEL_WIDTH;
private final static int TEXT_HEIGHT = 1;
private final static int BUTTON_WIDTH = 1;
private final static int BUTTON_HEIGHT = 1;
private final static int LABEL_START_ROW = LABEL_HEIGHT+LABEL_WIDTH+1;
private final static int LABEL_COLUMN = 0;
private final static int TEXT_START_ROW = LABEL_START_ROW;
private final static int TEXT_COLUMN = LABEL_WIDTH+1;
private final static int BUTTON_START_ROW = LABEL_START_ROW+9*LABEL_HEIGHT;
private final static int BUTTON_COLUMN = LABEL_COLUMN;
private final static int SEARCH_START_ROW = BUTTON_START_ROW+3;
final static String EMPTY_ARRAY_MESSAGE = "Hit ADD to add a new PRODUCT";
//Constructor-New instance of the JLabelTextFieldView.
public FinalInventoryGUI( Product productsIn)
{//Passing the frame title to JFrame, set the IconImage.
super("Welcome To The Inventory Program");
setLayout(layout);
//Copy the input array(products).
setProduct(productsIn);//maybe the title?????
//Start the display with the first element of the array.
index = 0;
//Build the GUI
buildGUI();
//Values
updateAllTextFields();
}//End of the constructor for building the GUI.
//Methods for copying the input of Product array to the GUIs private array
//variable
private void setInventoryArray(Product productsIn[])
products = new Product[productIn.length];
for (int i = 0; i<products.length; i++)
{//Creates A Product array element from the input array.
prodcuts[i] = new Product(productIn);
products[i] = new Product(productIn[i].productName(), productIn[i].itemNumber(),
productIn[i].unitStock(), productIn[i].unitPrice());
//System prints out a ineof the productsIn array to a string.
}//End of the for statment.
}//End for copying the array.
//A method for updating each of the GUIs fields.
private void updateAllTextFields()
if(products.length > 0)//Then update the JTextField display.
{// Update the product name text field.
productNameText.setText(products[index].productName());
//Update the Update the itemNumber text field.
itemNumberText.set(String.format("%d", products[index].itemNumber()));
//Update the title text field.
titleText.setText(dvd[index].title());
//Update the unitStock text field.
unitStockText.setText(String.format("%d",products[index].unitStock()));
//Update the unit price textField.
unitPriceText.setText(String.format("$%.2f",products[index].unitPrice()));
//Update the productValue textField.
productValueText.setText(String.format("$%.2f", products[index].productValue()));
//Update the restocking fee text field.
reStkfeeText.setText(String.format("$%.2f",reStkfee()));
//Update the total value of the inventory text field.
inventoryValueText.setText(String.formtat("$%.2f",Product.productValue(products)));
}//End of the if statement.
else//Put a special message in the fields.
{//Update the productName textField.
productNameText.setText(EMPTY_ARRAY_MESSAGE);
//Update the itemNumber textField
itemNumberText.setText(EMPTY_ARRAY_MESSAGE);
//Update the title textField.
titleText.setText(EMPTY_ARRAY_MESSAGE);
//Update the units in stock textField.
unitStockText.setText(EMPTY_ARRAY_MESSAGE);
//Update the unitPrice textFied.
unitPriceText.setText(EMPTY_ARRAY_MESSAGE);
//Update the productValue textField.
productValueText.setText(EMPTY_ARRAY_MESSAGE);
//Update the restocking fee textField.
reStkfeeText.setText(EMPTY_ARRAY_MESSAGE);
//Update the totatl inventoryValue textField.
inventoryValueText.setText(EMPTY_ARRAY_MESSAGE);
}//End else
}//Set the appropriate fields editable or uneditable.
private void setModifiableTextFieldsEnabled(Boolean state)
{//The fields of the product name, item number, unit price,
// and stock can be editable or non editable.
itemNumber.setEditable(state);
productName.setEditable(state);
unitPrice.setEditable(state);
unitStock.setEditable(state);
}//End setting of the modifiable textFields.
//Methods for the JButton methods.
private class ButtonHandler implements ActionListener
public void actionPerformed(ActionEvent event)
{//This is the first button being pressed by the user.
if(event.getSource()==firstButton)
handleFirstButton();
}//End if
else if(event.getSource()==previousButton)//Button previous is pressed by user.
handlePreviousButton();
}//End else if
else if (event.getSource()==nextButton)//Button next is pressed by user.
handleNextButton();
}//End else if.
else if (event.getSource()==lastButton)//Button last is pressed by the user.
handleLastButton();
}//End else if.
else if(event.getSource()==firstButton)
handleFirstButton();
}//End else if.
}//End metod of actionPeformed.
}//End class ButtonHandler
//Displaying the first element of the Product array
private void handlerFirstButton()
{//Setting the index to the first element in the array.
index = 0;
//Update and disable modification
updateAllFields();
setModifiableTextFieldsEnabled(false);
}//End method for handling the first button.
//Displaying the next element of the products array or wrap to the first.
private void handleNextButton()
{//Incrementation of the index.
index++;
//If the index exceeds the last valid array element, wrap around to the first
//element of the array.
if(index > products.length-1)
index = 0;
}//End if statment.
//Update and disable the modification.
updateAllFields();
setModifiableTextFieldsEnabled(false);
}//End method of handleNextButton.
private void handlePreviousButton()
index--;
if(index < 0)
index = products.length -1;
}//End if statment.
//Update and disabe modification.
updateAllTextFields();
setModifiableTextFieldsEnabled(false);
}//End method of handlePreviousButton.
private void handleLastButton()
index--;
if(index < products.length -1)
index = 2;
}//End if statment.
updateAllTextFields();
setMdifiableTextFieldsEnabled(false);
}//End method for handleLatButton
//The textFieldHandler class - handling the events of the buttonsmethods
private class TextFieldHandler implements ActionListener
public void actionPerformed(ActionEvent event)
{//The user pressed "ENTER" in the JTextField "title" text.
if(event.getSource() == itemNumber)
//HandleItemNumberTextField()is fired.
}//End the if statement.
//The user pressed "ENTER" in the JTextField "title" text.
else if (event.getSource() == titleText)
//HandleTitleTextField() is fired.
}//End the if statement.
//The user pressed "ENTER" in the JTextField "unitStoc" text.
else if(event.getSource() == unitStockText)
//HandleUnitStockTextField() is fired.
}//End the if statment
//The user pressed "ENTER" in the JtextField "unitPrice" text.
else if (event.getSource() == unitPriceText)
//HandleUnitPriceTextField() is fired.
}//End the if statment.
//The user pressed "ENTER" in the JTextField "Search" text.
else if(event.getSource() == searchText)
//HandleSearchTextField() is fired.
}//End the if statment.
}//End the method actionPerformed.
}//End the inner class TextFieldhandler.
//The GUI methods.
//Building the GUI.
private void BuildGUI()
{//Mthod for adding the LOGO.
buildLogo();
//Add the text fields and their labels.
buildLabels();
buildTextFields();
//Add the navigation and other buttons.
buildMainButtons();
//Provide value to the Fields.
updateAllTextFields();
//provide some setup to the frame.
setSize(FRAME_LENGTH, FRAME_WIDTH);
setLocation(FRAME-XLOC, FRAME_YLOC);
setResizable(false);
//PACK(); IS THIS NOT PART OF THE GUI ADDED AT THE END OR IS WHAT
//FOLLOWS THE SAME AS SAYING ".PACK()".
setDefaultCloseOperation(EXIT_ON_CLOSE);//DOES IT MATTER WHERE THIS LINE FALLS?
//WHEN I TRIED TO USE IT IN THE MAIN I RECEIVED AN ERROR AND THE SAME WHEN I
//PLACED IT IN THE CONSTRUCTOR--WHY?.
setVisible(true);
}//End of building the GUI.
//Addin the LOGO to the Frame.
private void buildLogo()
constraints.weightx = 2;
constraints.weigthy = 1;
logoLabel = new JLabel(new ImageIcon("O2K.jpg"));
logoLabel.setText("Products Inventory");
constraints.fill = GridBagConstraints.BOTH;
addToGridbag(logoLabel,2,2,LOGO_WIDTH, LOGO_HEIGHT);
//Creating a vertical space.
addToGridBag(new JLabel(""),LOGO_HEIGHT+1,0, LOGO_WIDTH, LABEL_WIDTH);
}//End the method with building the LOGO.
//Build the panel just containing the text.
private void buildLabels()
{//Set up if for readability).
int rows = 0;
int column = 0;
int width = 0;
int height = 0;
column = LABEL_COLUMN;
width = LABEL_WIDTH;
height = LABEL_HEIGHT;
constraints.weightx = 1;
constraints.weighty = 0;
constraints.fill = GridbagConstraints.Both;
//Create the name labes and name the TextFields.
productNameLabel = new JLabel("Product Name:");
productnamelabel.setLabelfor(productNameField);
productNameLabel.setLabelFor(productNameText);
productNameLabel.setToolTipText("Enter The Product Name Here");
row = Label_START_ROW;
addToGridBag(productNameLabel, row, column, width, height);
//Create the itemNumberLabel and TextField.
itemNumberLabel = new JLabel("Product Id:");
itemNumberLabel.setLabelFor(itemNumberText);
row += LABEL_HEIGHT;
addToGridBag(itemNumber, row, column, width, height);
//Create the title label for the Product and the title text field.
titleLabel = new JLabel("Inventory Of Products:");
titleLabel.setLabelFor(titleText);
row += LABEL_HEIGHT;
addToGridBag(titleLabel,row,column,width,height);
//Create the unitStock label and textField.
unitStockLabel = new JLabel("Units In Stock:");
unitStockLabel.setLabelFor(unitStockLabel);
row += LABEL_HEIGHT;
addToGridBag(unitStocklabel, row, column, height);
//Creat the unitPrice label and textField.
unitPriceLabel = new JLabel("Unit Price");
unitPriceLabel.setLabelFor(unitPriceLabel);
unitPriceLabel.setToolTipText("The Cost Of The Product");
row += LABEL_HEIGHT;
addToGridBag(unitPriceLabel, row, column, height);
//Create the productValue label and textField.
productValueLabel = new JLabel("Total Product Value:");
productValueLabel.setLabelFor(productValueLabel);
row += LABEL_HEIGHT;
addToGridBag(productValue, row, column, height);
//Create the restocking fee of 1.05% Label and textField.
reStkfeeLabel = new JLabel("Product Restock Fee:");
reStkfeeLabel.setLabelFor(reStkfeeLabel);
row+= LABEL_HEIGHT;
addToGridBag(reStkfee, row, column, height);
//Create a vertical space.
row += LABEL_HEIGHT;
//Create the Total Inventory Value label and textField.
inventoryValueLabel = new JLabel("Total Inventory Value:");
inventoryValueLabel.setLabelFor(inventoryValueLabel);
row += LABEL_HEIGHT;
addToGridBag(inventoryValue, row, column, height);
}//End the method for building the labels
//Build the methods for the TextFields.
private void buildTextFields()
{//Defining the variables
int row = 0;
int column = 0;
int width = 0;
int height = 0;
column = TEXT_COLUMN;
width = TEXT_WIDTH;
height = TEXT_HEIGHT;
constraints.fill = GridBagConstraints.BOTH;
constraints.weightx = 1;
TextFieldHandler handler = new TextFieldHandler();
productNameText = new JTextField("Product Name");
productNameText.setEditable(false);
row = TEXT_START_ROW;
addToGridBag(productNameText, row, column, height);
itemNumberText = new JTextField("Product Id");
itemNumberText.setEditable(false);
row = TEXT_START_ROW;
addToGridBag(itemNumberText, row, column, height);
titleText = new JTextField("Title");
titleText.addActionListener(handler);
titleText.setEditable(false);
row += TEXT_HEIGHT;
addToGridBag(titleText, row, column, height);
unitPriceText = new JTextField("Unit Price");
unitPriceText.addActionListener(handler);
unitPrice.setEditable(false);
row += TEXT_START_ROW;
addToGridBag(unitPriceText, row, column, height);
unitStockText = new JTextField("Units In Stock");
unitStockText.addActionListener(handler);
unitStockText.setEditable(false);
row += TEXT_START_ROW;
addToGridBag(unitStockText, row, column, height);
productValueText =new TextField("Product Value");
productValueText.addActionListener(handler);
productValueText.setEditable(false);
row += TEXT_START_ROW;
addToGridBag(productValueText, row, cloumn, height);
reStkfeeText =new JTextField("Restock Fee");
reStkfeeText.addActionListener(handler);
reStkfeeText.setEditable(false);
row += TEXT_START_ROW;
addToGridBag(reStkfeeText, row, cloumn, height);
//Creat vertical space.
row += TEXT_HEIGHT;
addToGridBag(new JLabel(""),row, column, height);
inventoryValueText =new TextField("Inventory Value");
inventoryValueText.addActionListener(handler);
inventoryValueText.setEditable(false);
row += TEXT_START_ROW;
addToGridBag(inventoryValueText, row, cloumn, height);
}//End the methods for building the TextFields.
//Add the main buttons to the frame.
private void buildMainButtons()
{//Declaraing the variables.
int row = 0;
int column = 0;
int width = 0;
int height = 0;
row =BUTTON_START_ROW;
column = BUTTON_COLUMN;
width = BUTTON_WIDTH;
height = BUTTON_HEIGHT;
constraints.weightx = 1;
constraints.weighty = 0;
//The constraints.fill = GridBagConstraints.HORIZONTAL;
ButtonHandler handler = new ButtonHandler();
//Creat a veritical space.
addToGridbag(new JLabel(""), row, column, width, height);
firstButton = new JButton("First");
firstButton.addActionListener(handler);
row += LABEL_HEIGHT;
addToGridBage(firstButton, row, column, width, height);
previousButton = new JButton("Previous");
previousButton.addActionListener(handler);
row += LABEL_HEIGHT;
addToGridBage(previousButton, row, column, width, height);
nextButton = new JButton("Next");
nextButton.addActionListener(handler);
row += LABEL_HEIGHT;
addToGridBage(nextButton, row, column, width, height);
lastButton = new JButton("Last");
lastButton.addActionListener(handler);
row += LABEL_HEIGHT;
addToGridBage(lastButton, row, column, width, height);
addButton = new JButton("Add");
addButton.addActionListener(handler);
row += LABEL_HEIGHT;
addToGridBage(addButton, row, column, width, height);
deleteButton = new JButton("Delete");
deleteButton.addActionListener(handler);
row += LABEL_HEIGHT;
addToGridBage(deleteButton, row, column, width, height);
saveButton = new JButton("Save");
saveButton.addActionListener(handler);
row += LABEL_HEIGHT;
addToGridBage(saveButton, row, column, width, height);
searchButton = new JButton("Search");
searchButton.addActionListener(handler);
row += LABEL_HEIGHT;
addToGridBage(searchButton, row, column, width, height);
//End methods for building the main butt0ns.
private void addToGridBag(Component component, int row, int column, int width, int height)
{ //Set up the upper-left corner of the component gridx and gridy.
constraints.gridx = column;
constraints.gridy = row;
//Set the numbers of rows and columns the components occupies.
constraints.gridwidth = width;
constraints.gridheight = height;
//set the constraints
Layout.setConstraints(component, constraints);
//Add the component to the JFrame.
add(component);
}//End method for addGridBag.
//End class JLabelTextFieldViewGui.
class Invetnory4
public static void main(String args[])
{ //An array variable.
Product[]inventory;
inventory = new Product[10];
//Create and pass control to the GUI
FinalInventory gui = new FinaInventoryGUI(inventory);
}//End method main
}//End class Inventory4
/*Inventory.java*/
/*Means for importing program packages*/
/*Beginning of the class type Inventory*/Hi Bryan,
I took your advice and decided to take a different approach to the problem I am having, I decided to stay somewhat with the basics with little knowledge I have about coding. I am new to this and I am trying to learn through the fire but it's getting hot so if you don't mind, can you tell me what I need to do to fix the error messages I am getting.
1. "else" without "if',
2. can't load my icon-a JPG
3. exception in thread amin
process complete.
4.Text area for displaying an iteration of the input
the code is not as long as the other one! any help will be appreciated. Also I am attaching the code to the GUI that does work but I can not seem to get the actionListener aspect to work. Thanks again.
//this one works and it serves as a model for what I am //trying to do in the fields. as well as designate a text area //where a each entry per iteration of input is displayed
* @(#)InventoryGUIFrame.java
* @author
* @version 1.00 2008/2/2
package components;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.ImageIcon;
import javax.swing.event.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import java.text.*;
import java.awt.*;
* FormattedTextFieldDemo.java requires no other files.
* It implements a mortgage calculator that uses four
* JFormattedTextFields.
public class InventoryGUIFrame extends JFrame
String productName;
String itemNumber;
double unitPrice;
double unitStock;
//Labels to identify the fields
private JLabel productNamelabel;
private JLabel itemNumberlabel;
private JLabel unitPricelabel;
private JLabel unitStocklabel;
//Fields for data Entry
private JTextField productNameField;
private JTextField itemNumberField;
private JTextField unitPriceField;
private JTextField unitStockField;
//Adding the JButtons
JButton firstButton;
JButton nextButton;
JButton previousButton;
JButton searchButton;
JButton addButton;
JButton deleteButton;
JButton saveButton;
//Constructor
public InventoryGUIFrame()
super("Welcome To The Inventory Program");
setLayout(new FlowLayout());
setDefaultCloseOperation(EXIT_ON_CLOSE);
JFrame Frame = new JFrame();
Frame JPanel = new Frame();
JPanel JLabel= new JPanel();
TextArea area = new TextArea();
productNamelabel = new JLabel("PRODUCT NAME");
productNamelabel.setToolTipText("Name of the item you wish to calculate");
add(productNamelabel);
productNameField= new JTextField(8);
add(productNameField);
itemNumberlabel = new JLabel("PRODUCT NUMBER");
itemNumberlabel.setToolTipText("Number identifying the product");
add(itemNumberlabel);
itemNumberField =new JTextField(5);
add(itemNumberField);
unitPricelabel=new JLabel("PRODUCT PRICE");
unitPricelabel.setToolTipText("What is the cost of the product?:");
add(unitPricelabel);
unitPriceField = new JTextField(5);
add(unitPriceField);
unitStocklabel = new JLabel("UNITS IN STOCK");
unitStocklabel.setToolTipText("How many products in inventory?:");
add(unitStocklabel);
unitStockField = new JTextField(5);
add(unitStockField);
firstButton =new JButton("First");
add(firstButton);
nextButton = new JButton("Next");
add(nextButton);
previousButton = new JButton("Previous");
add(previousButton);
addButton = new JButton("Add");
add(addButton);
deleteButton = new JButton("Delete");
add(deleteButton);
saveButton = new JButton("Save");
add(saveButton);
searchButton = new JButton("Search");
add(searchButton);
public static void main(String args[])
InventoryGUIFrame frame = new InventoryGUIFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(740,150);
frame.setVisible(true);
class InventorySystem6
{ /*Declaration of products[] and the maximum storing capacity*/
private Product products[] = new Product[MAX_NUM_OF_PRODUCTS];
/*Prompts user to make another selection or exit program*/
private static final String STOP_COMMAND = "stop";
/*parameters defining maximun numbers of products available for storing in */
private static final int MAX_NUM_OF_PRODUCTS = 100;
/*Declaration of the variables */
String name;
String item;
double stock;
double price;
double reStkfee=1.05;
double pValue;
double iValue;
public InventorySystem6()
/*Empty Constructor*/
}/*Beginning of product input by the user*/
public void inputProductInfo()
{ /*Declaration of currency format*/
DecimalFormat Currency = new DecimalFormat();
Scanner input = new Scanner(System.in);
/*Beginning of the Loop*/
JOptionPane.showMessageDialog(null,"Welcome to the Inventory Program\n","Welcome to the Inventory Program\n",
JOptionPane.PLAIN_MESSAGE);
for(int i = 0; i<MAX_NUM_OF_PRODUCTS ; i++)
name = JOptionPane.showInputDialog( "What is the Product Name? ");
if(name.equalsIgnoreCase("stop"))
break;
String item = JOptionPane.showInputDialog("Enter the products ID");
String priceStr =JOptionPane.showInputDialog("Enter the products price");
double price=Double.parseDouble(priceStr);
String stockStr=JOptionPane.showInputDialog("Enter the units in stock " );
double stock = Double.parseDouble(stockStr);
double sum=price*stock;
JOptionPane.showMessageDialog(null,"The product value is:"+sum, "pValue",
JOptionPane.PLAIN_MESSAGE);
/* JOptionPane.showMessageDialog(null,"The Product Name is:"+productName, "productName"
,"\n","The Product Id is "+productId,"Product ID"
,"\n","The Unit Price is"+unitPrice,"Unit Price"
,"\n","The Units In Stock is"+unitStock,"UnitStock"
,"\n","The Product Value is"+productValue, "productValue"
,"\n","The Restocking Fee is "+reStockfee,"Restock Fee"
,"\n","The Inventory Value is"+inventoryValue,"Inventory Value"
,"\n","The Inventory Restock Fee is"+reStockfee,"Restock Fee"
,"\n",JOptionPane.PLAIN_MESSAGE);*/
//Product products[] = new Product[100];
products[i] = new Product();
products[i].setitem(item);
products[i].setname(name);
products[i].setprice(price);
products[i].setstock(stock);
products[i].setpValue(sum);
products[i].setreStkfee(reStkfee);
iValue += sum + products[i].getreStkfee();
public void displayProductInfo()
{ /*Initialization of the variable total inventory value*/
NumberFormat moneyFormat = NumberFormat.getCurrencyInstance();
for(int i = 0; i<MAX_NUM_OF_PRODUCTS ; i++)
Product product = products[i];
if(product==null)
System.out.println(products[i]);
break;
System.out.printf("product name: %s\n ", product.getname());
System.out.printf("product ID: %s \n", product.getitem());
System.out.printf("Unit Price: %s \n", moneyFormat.format(product.getprice()));
System.out.printf("units in Stock: %s \n", product.getstock());
System.out.printf("Total product Value: %s \n", moneyFormat.format(product.getpValue()));
System.out.printf("Restocking fee: %s \n", moneyFormat.format(product.getreStkfee()));
System.out.printf("Inventory Value: %s \n", iValue);
}/*Beginning of method main*/
public static void main(String[] args)
{/*Message*/
/*Means for retrieving and storing new data input into inventory program*/
InventorySystem6 JTableImageCreator = new InventorySystem6();
JTableImageCreator.displayProductInfo();
JTableImageCreator.inputProductInfo();
class Product
/*Declaration of and default value of specified variables*/
//private Product products[] = new Product[100];
private String item;
String name;
private double stock;
private double price;
private double pValue;
private double reStkfee;
//private String productNames[] = new String[1000]; //declaration of array "productNames" to store Product Names
private double iValue;
/*method defining the get and set values of each individual variable*/
public String getname()
{/*Mean for storing and retrieving input of name*/
return name;
}/*Means for setting the product name*/
public void setname(String name)
{/*null pointer argument exception defining metod for obtainng product name*/
this.name = name;
}/*Means for getting the units identifcation number inputted by the user*/
public String getitem()
{/*Means for returning the user input*/
return item;
}/*Means for setting the units identifcation */
public void setitem(String item)
{/*null pointer argument exception for setting the product identification number*/
this.item = item;
}/*Means for getting the units value input*/
public double getstock()
{/*Means for returning the variable of the units*/
return stock;
}/*Means for setting the units value*/
public void setstock(double stock)
this.stock = stock;
public double getprice()
{/*Means for returning the dollar value of the price of the unit(s)*/
return price;
}/*Means for setting and requesting user to input + dollar amt*/
public void setprice(double price)
this.price = price ;
}/*Means for setting the value of the total product value*/
public void setpValue(double pValue)
this.pValue = pValue+(price*stock);
}/*Means for getting the value of the product*/
public double getpValue()
{/*Means for returning the value*/
return pValue;
}/*Means for getting the TtlInventoryValue of products entered*/
public void setiValue(double iValue)
{/*Condition Statement*/
this.iValue=iValue;
public double getiValue()
return iValue;
public void setreStkfee(double reStkfee)
this.reStkfee=stock*price*1.05;
/*Means for setting restockin fee of the total products*/
public double getreStkfee()
{/*Means for calculating the restocking fee of each products units nStock*/
return reStkfee;
}/*Method for string the elements in [i] for display*/
public String toString()
{/*Means for returning defined string of elements in [i]*/
return "Product{" +
"item="+ item +
", name="+ name +
", stock="+ stock +
", price="+price +
", pValue="+pValue +
", reStkfee="+ reStkfee +
", iValue="+iValue+
}/*End set and get method*/
}/*End of class Product*/
/*Delcaration of the class type sortproductNames*/
class sortproductNames extends Product
{/*Declaration of the variable productName*/
protected String name;
/*Means for setting and getting values of the variable productName*/
public void setname(String name)
this.name = name;
public String getname()
return name;
public int compareTo(Object object)
{ // for sorting by product name
Product anotherProduct = (Product) object;
return name.compareTo( anotherProduct.name);
g.drawImage(image,0,0,200,50,0,0,image.getWidth(null), image.getHeight(null),null);
else;
g.drawString("O2K", 10,10);
* @(#)InventoryGUIFrame.java
* @author
* @version 1.00 2008/2/2
package components;
import java.io.*;
import java.awt.font.*;
import java.awt.geom.*;
import java.awt.image.*;
import javax.imagio.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.ImageIcon;
import javax.swing.event.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import java.text.*;
import java.awt.*;
* FormattedTextFieldDemo.java requires no other files.
* It implements a mortgage calculator that uses four
* JFormattedTextFields.
public class InventoryGUIPanelFrameTextArea extends JFrame
String productName;
String itemNumber;
double unitPrice;
double unitStock;
//Labels to identify the fields
private JLabel productNamelabel;
private JLabel itemNumberlabel;
private JLabel unitPricelabel;
private JLabel unitStocklabel;
//Fields for data Entry
private JTextField productNameField;
private JTextField itemNumberField;
private JTextField unitPriceField;
private JTextField unitStockField;
private Product[] products;
private int unitStock;
private int currentIndex=0;
//Adding the JButtons
JButton firstButton;
JButton nextButton;
JButton previousButton;
JButton searchButton;
JButton addButton;
JButton deleteButton;
JButton saveButton;
//Constructor
public InventoryGUIPanelFrameTextArea()
super("Welcome To The Inventory Program");
this.products = products;
this.numOfProducts = products;
JFrame JPanel = new JFrame();
setDefaultCloseOperation(EXIT_ON_CLOSE);
setLayout(new GridLayout());
showLogo();
showLabels();
showInputFields();
showButtons();
public void showLogo()
O2K myLogo = new O2K();
this.add(myLogo);
public void showLabels()
JPanel panel = new JPanel();
panel.add(new JLabel("PRODUCT NAME"));
panel.add(new JLabel("ITEM NUMBER"));
panel.add(new JLabel("UNIT PRICE"));
panel.add(new JLabel("UNITS IN STOCK"));
this.add(panel);
public void showInputFields()
itemNumber =new JTextField(5);
itemNumber.setEditable(false);
productName= new JTextField(10);
productName.setEditable(false);
unitPrice= new JTextField(5);
unitPrice.setEditable(false);
unitStock = new JTextField(10);
unitStock.setEditable(false);
panel.setEditable(false);
panel.add(itemNumber);
panel.add(productName);
panel.add(unitPrice);
panel.add(unitStock);
this.add(panel);
public void showButtons()
JPanel panel = new JPanel();
first = new JButton("First");
next = new JButton("Next");
previous = new JButton("Previous");
add = new JButton ("Add");
delete = new JButton ("Delete");
search = new JButton ("Search");
save = new JButton ("Save");
panel.add(first);
panel.add(next);
panel.add(previous);
panel.add(add);
panel.add(delete);
panel.add(search);
panel.add(save);
panel.add(this);
ButtonActionHandler handler = new ButtonActionHandler();
first.addActionListener(handler);
next.addActionListener(handler);
previous.addActionListener(handler);
add.addActionListener(handler);
delete.addActionListener(handler);
search.addActionListener(handler);
save.addActinListener(handler);
this.add(panel);
setFields(0);
protected void paintComponent (Graphics g)
public void setFields(int i)
setItemNumber(i);
setProductName(i);
setUnitPrice(i);
setUnitStock(i);
public void setItemNumber( int i)
itemNumber.setText(products[i].getItemNumber());
public void setProductName(int i)
productname.setText(products[i].getProductName());
public void setUnitPrice( int i)
unitPrice.setText(String.valueOf(products[i].getunitPrice()));
public void setUnitStock(int i)
unitStock.setText(String.valueOf(products[i].getunitStock()));
private class ButtonActionHandler implements ActionListener
public void actionPerformed(ActionEvent event)
if(event.getSource()==first)
currentIndex=0;
setFields(currentIndex);
else if(event.getSource()==next)
currentIndex++;
if(currentIndex==unitStock);
currentIndex--;
setFields(currentIndex);
else if (event.getSource()==previous)
currentIndex--;
if(curentIndex < 0)
currentIndex=0;
setFields(currentIndex);
else if(event.getSource()==last)
currentIndex = unitStock -1;
setFields(currentIndex);
else if(event.getSource()==add)
currentIndex = productName ++;
setFields(currentIndex);
else if(event.getSource()==delete)
currentIndex= productName -1;
setFields(currentIndex);
else if (event.getSource()==search)
currentIndex=productName ++;
setFields(currentIndex);
else if (event.getSource()==save)
currentIndex=productName ++;
setFields(currentIndex);
public static void main(String args[])
JFrame mainFrame = new JFrame();
mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mainFrame.setSize(400,300);
mainFrame.setVisible(true);
class InventorySystem6
{ /*Declaration of products[] and the maximum storing capacity*/
private Product products[] = new Product[MAX_NUM_OF_PRODUCTS];
/*Prompts user to make another selection or exit program*/
private static final String STOP_COMMAND = "stop";
/*parameters defining maximun numbers of products available for storing in [i]*/
private static final int MAX_NUM_OF_PRODUCTS = 100;
/*Declaration of the variables */
String name;
String item;
double stock;
double price;
double reStkfee=1.05;
double pValue;
double iValue;
public InventorySystem6()
/*Empty Constructor*/
}/*Beginning of product input by the user*/
public void inputProductInfo()
{ /*Declaration of currency format*/
DecimalFormat Currency = new DecimalFormat();
Scanner input = new Scanner(System.in);
/*Beginning of the Loop*/
JOptionPane.showMessageDialog(null,"Welcome to the Inventory Program\n","Welcome to the Inventory Program\n",
JOptionPane.PLAIN_MESSAGE);
for(int i = 0; i<MAX_NUM_OF_PRODUCTS ; i++)
name = JOptionPane.showInputDialog( "What is the Product Name? ");
if(name.equalsIgnoreCase("stop"))
break;
String item = JOptionPane.showInputDialog("Enter the products ID");
String priceStr =JOptionPane.showInputDialog("Enter the products price");
double price=Double.parseDouble(priceStr);
String stockStr=JOptionPane.showInputDialog("Enter the units in stock " );
double stock = Double.parseDouble(stockStr);
double sum=price*stock;
JOptionPane.showMessageDialog(null,"The product value is:"+sum, "pValue",
JOptionPane.PLAIN_MESSAGE);
/* JOptionPane.showMessageDialog(null,"The Product Name is:"+productName, "productName"
,"\n","The Product Id is "+productId,"Product ID"
,"\n","The Unit Price is"+unitPrice,"Unit Price"
,"\n","The Units In Stock is"+unitStock,"UnitStock"
,"\n","The Product Value is"+productValue, "productValue"
,"\n","The Restocking Fee is "+reStockfee,"Restock Fee"
,"\n","The Inventory Value is"+inventoryValue,"Inventory Value"
,"\n","The Inventory Restock Fee is"+reStockfee,"Restock Fee"
,"\n",JOptionPane.PLAIN_MESSAGE);*/
//Product products[] = new Product[100];
products[i] = new Product();
products[i].setItemNumber(itemNumber);
products[i].setPrdocutName(productName);
products[i].setUnitPrice(unitPrice);
products[i].setUnitStock(unitStock);
products[i].setProductValue(sum);
products[i].setReStkfee(reStkfee);
inventoryValue += sum + products[i].getreStkfee();
public void displayProductInfo()
{ /*Initialization of the variable total inventory value*/
NumberFormat moneyFormat = NumberFormat.getCurrencyInstance();
for(int i = 0; i<MAX_NUM_OF_PRODUCTS ; i++)
Product product = products[i];
if(product==null)
System.out.println(products[i]);
break;
System.out.printf("product name: %s\n ", product.getproductName());
System.out.printf("product ID: %s \n", product.getitemNumber());
System.out.printf("Unit Price: %s \n", moneyFormat.format(product.getunitPrice()));
System.out.printf("units in Stock: %s \n", product.getunitStock());
System.out.printf("Total product Value: %s \n", moneyFormat.format(product.getproductValue()));
System.out.printf("Restocking fee: %s \n", moneyFormat.format(product.getreStkfee()));
System.out.printf("Inventory Value: %s \n", inventoryValue);
}/*Beginning of method main*/
public static void main(String[] args)
{/*Message*/
/*Means for retrieving and storing new data input into inventory program*/
InventorySystem6 JTableImageCreator = new InventorySystem6();
JTableImageCreator.displayProductInfo();
JTableImageCreator.inputProductInfo();
class Product
/*Declaration of and default value of specified variables*/
//private Product products[] = new Product[100];
protected String itemNumber;
protected String prodcutname;
protected double unitStock;
protected double unitPrice;
protected double productValue;
protected double reStkfee;
protected double inventoryValue;
//private String productNames[] = new String[1000]; //declaration of array "productNames" to store Product Names
/*method defining the get and set values of each individual variable*/
public String getproductName()
{/*Mean for storing and retrieving input of name*/
return productName;
}/*Means for setting the product name*/
public void setProductName(String productName)
{/*null pointer argument exception defining metod for obtainng product name*/
this.productName = ProductName;
}/*Means for getting the units identifcation number inputted by the user*/
public String getitemNumber()
{/*Means for returning the user input*/
return itemNumber;
}/*Means for setting the units identifcation */
public void setItemNumber(String itemNumber)
{/*null pointer argument exception for setting the product identification number*/
this.itemNumber = itemNumber;
}/*Means for getting the units value input*/
public double getunitStock()
{/*Means for returning the variable of the units*/
return unitStock;
}/*Means for setting the units value*/
public void setUnitStock(double unitStock)
this.unitStock = unitStock;
public double getunitPrice()
{/*Means for returning the dollar value of the price of the unit(s)*/
return unitPrice;
}/*Means for setting and requesting user to input + dollar amt*/
public void setUnitPrice(double unitPrice)
this.unitPrice = unitPrice ;
}/*Means for setting the value of the total product value*/
public void setProductValue(double prodcutValue)
this.prodcutValue = unitPrice*unitStock;
}/*Means for getting the value of the product*/
public double getproductValue()
{/*Means for returning the value*/
return productValue;
}/*Means for getting the TtlInventoryValue of products entered*/
public void setInvetnoryValue(double invetnoryValue)
{/*Condition Statement*/
this.inventoryValue=inventoryValue;
public double getinvetotyValue()
return productValue;
public void setReStkfee(double reStkfee)
this.reStkfee=stock*price*1.05;
/*Means for setting restockin fee of the total products*/
public double getreStkfee()
{/*Means for calculating the restocking fee of each products units nStock*/
return reStkfee;
}/*Method for string the elements in [i] for display*/
public String toString()
{/*Means for returning defined string of elements in [i]*/
return "Product{" +
"itemNumber="+ itemNumber +
", productName="+ productName +
", unitStock="+ unitStock +
", unitPrice="+unitPrice +
", productValue="+prodcutValue +
", reStkfee="+ reStkfee +
", inventoryValue="+inventoryValue+
}/*End set and get method*/
}/*End of class Product*/
/*Delcaration of the class type sortproductNames*/
class sortproductNames extends Product
{/*Declaration of the variable productName*/
protected String name;
/*Means for setting and getting values of the variable productName*/
public void setProdcutName(String productName)
this.productName = productName;
public String getproductName()
return productName;
public int compareTo(Object object)
{ // for sorting by product name
Product anotherProduct = (Product) object;
return productName.compareTo( anotherProduct.productName);
class myGraphics extends component
private BufferedImage image;
private boolean imageFound = true;
public myGraphics()
super();
try
image=ImageIO.read(new File("Logo.jpg"));
catch(IOException x)
x.printStackTrace();
imageFound = false;
public void paint(Graphics g)
g.drawImage(image,0,0,200,50,0,0,image.getWidth(null), image.getHeight(null),null);
else;
g.drawString("O2K", 10,10); -
PostCode - problem with validation
Hello,
I have problem with codes in Netbeans.I Have two code.
The first is to mask formatter and i put in on Post int code
try
MaskFormatter PostCode = new MaskFormatter("##-###");
PostCode.setValidCharacters("0123456789");
RegisterPostCode = new JFormattedTextField(PostCode);
catch (ParseException e) {
}The Second check, the RegisterPostCode is not null
class Steps implements ActionListener{
int step = 0;
public void actionPerformed(ActionEvent e) {
if (step == 0){
String NotEmptyPostCode = RegisterPostCode.getText();
if(NotEmptyPostCode == null || NotEmptyPostCode.length() == 0) {
jLabel4.setText("This Field is empty");
return;
step++;
}Problem is the second code doesnt work and I dont now how to create code to check the JFormatterField is compatible with the first code
Please help.Hi! I have an HTML region and on my "before header process" I fetch only one record (the data is got from a package I've created on the DB).
This region has a few items and when I press the save button (I created on the screen) the value of all the items are cleared if the validation ocurrs, I don't know why, is this because the page doesn;t perfom again my "before header process"?
Thanks! -
JSpinner problems with alignment of text
I experience problems with the alignment of the text within the spinner. I read a few topics on this forum. Many answers point to the solution of grabbing the JFormattedTextField from the spinner and call the setHorizontalAlignment(int) method. Seems hat doesn't work for me.
Here is the code I wrote:
SpinnerDateModel dateModel = new SpinnerDateModel();
JSpinner dateSpinner = new JSpinner(dateModel);
JSpinner.DateEditor dateEditor = (JSpinner.DateEditor)dateSpinner.getEditor();
JFormattedTextField tf = dateEditor.getTextField();
tf.setHorizontalAlignment(JFormattedTextField.RIGHT);
maybe I am missing something. Please help!
Thank You in advance.I'm not sure if this is the solution, but the getTextField() Method should be called on a JSpinner, rather than a SpinnerDateModel. I took this Method from the Swing Tutorial and made it static, so i could use it anywhere:
public static JFormattedTextField getTextField(JSpinner spinner) {
JComponent editor = spinner.getEditor();
if (editor instanceof JSpinner.DefaultEditor) {
return ((JSpinner.DefaultEditor)editor).getTextField();
} else {
System.err.println("Unexpected editor type: "
+ spinner.getEditor().getClass()
+ " isn't a descendant of DefaultEditor");
return null;
}Besides, setting an Editor for this JSpinner is not neccesary, because it is chosen automaticaly. You only need to do so if you have implemented a custom SpinnerModel.
Hope this was any help... -
I am trying to implement some kind of a server listening for requests. The listener part of the app, is a daemon thread that listens for connections and instantiates a handling daemon thread once it gets some. However, my problem is that i must be able to kill the listening thread at the user's will (say via a sto button). I have done this via the Sun's proposed way, by testing a boolean flag in the loop, which is set to false when i wish to kill the thread. The problem with this thing is the following...
Once the thread starts excecuting, it will test the flag, find it true and enter the loop. At some point it will LOCK on the server socket waiting for connection. Unless some client actually connects, it will keep on listening indefinatelly whithought ever bothering to check for the flag again (no matter how many times you set the damn thing to false).
My question is this: Is there any real, non-theoretical, applied way to stop thread in java safely?
Thank you in advance,
LeftyThis was one solution from the socket programming forum, have you tried this??
public Thread MyThread extends Thread{
boolean active = true;
public void run(){
ss.setSoTimeout(90);
while (active){
try{
serverSocket = ss.accept();
catch (SocketTimeoutException ste){
// do nothing
// interrupt thread
public void deactivate(){
active = false;
// you gotta sleep for a time longer than the
// accept() timeout to make sure that timeout is finished.
try{
sleep(91);
}catch (InterruptedException ie){
interrupt();
} -
Problem with Threads and a static variable
I have a problem with the code below. I am yet to make sure that I understand the problem. Correct me if I am wrong please.
Code functionality:
A timer calls SetState every second. It sets the state and sets boolean variable "changed" to true. Then notifies a main process thread to check if the state changed to send a message.
The problem as far I understand is:
Assume the timer Thread calls SetState twice before the main process Thread runs. As a result, "changed" is set to true twice. However, since the main process is blocked twice during the two calls to SetState, when it runs it would have the two SetState timer threads blocked on its synchronized body. It will pass the first one, send the message and set "changed" to false since it was true. Now, it will pass the second thread, but here is the problem, "changed" is already set to false. As a result, it won't send the message even though it is supposed to.
Would you please let me know if my understanding is correct? If so, what would you propose to resolve the problem? Should I call wait some other or should I notify in a different way?
Thanks,
B.D.
Code:
private static volatile boolean bChanged = false;
private static Thread objMainProcess;
protected static void Init(){
objMainProcess = new Thread() {
public void run() {
while( objMainProcess == Thread.currentThread() ) {
GetState();
objMainProcess.setDaemon( true );
objMainProcess.start();
public static void initStatusTimer(){
if(objTimer == null)
objTimer = new javax.swing.Timer( 1000, new java.awt.event.ActionListener(){
public void actionPerformed( java.awt.event.ActionEvent evt){
SetState();
private static void SetState(){
if( objMainProcess == null ) return;
synchronized( objMainProcess ) {
bChanged = true;
try{
objMainProcess.notify();
}catch( IllegalMonitorStateException e ) {}
private static boolean GetState() {
if( objMainProcess == null ) return false;
synchronized( objMainProcess ) {
if( bChanged) {
SendMessage();
bChanged = false;
return true;
try {
objMainProcess.wait();
}catch( InterruptedException e ) {}
return false;
}Thanks DrClap for your reply. Everything you said is right. It is not easy to make them alternate since SetState() could be called from different places where the state could be anything else but a status message. Like a GREETING message for example. It is a handshaking message but not a status message.
Again as you said, There is a reason I can't call sendMessage() inside setState().
The only way I was able to do it is by having a counter of the number of notifies that have been called. Every time notify() is called a counter is incremented. Now instead of just checking if "changed" flag is true, I also check if notify counter is greater than zero. If both true, I send the message. If "changed" flag is false, I check again if the notify counter is greater than zero, I send the message. This way it works, but it is kind of a patch than a good design fix. I am yet to find a good solution.
Thanks,
B.D. -
Problem with threads running javaw
Hi,
Having a problem with multi thread programming using client server sockets. The program works find when starting the the application in a console using java muti.java , but when using javaw multi.java the program doesnt die and have to kill it in the task manager. The program doesnt display any of my gui error messages either when the server disconnect the client. all works find in a console. any advice on this as I havent been able to understand why this is happening? any comment would be appreciated.
troy.troy,
Try and post a minimum code sample of your app which
does not work.
When using javaw, make sure you redirect the standard
error and standard output streams to file.
Graeme.Hi Graeme,
I dont understand what you mean by redirection to file? some of my code below.
The code works fine under a console, code is supposed to exit when the client (the other server )disconnects. the problem is that but the clientworker side of the code still works. which under console it doesnt.
public class Server{
ServerSocket aServerSocket;
Socket dianosticsSocket;
Socket nPortExpress;
ClientListener aClientListener;
LinkedList queue = new LinkedList();
int port = 0;
int clientPort = 0;
String clientName = null;
boolean serverAlive = true;
* Server constructor generates a server
* Socket and then starts a client threads.
* @param aPort socket port of local machine.
public Server(int aPort, String aClientName, int aClientPort){
port = aPort;
clientName = aClientName;
clientPort = aClientPort;
try{
// create a new thread
aServerSocket = new ServerSocket(port) ;
// connect to the nPortExpress
aClientListener = new ClientListener(InetAddress.getByName(clientName), clientPort, queue,this);
// aClientListener.setDaemon(true);
aClientListener.start();
// start a dianostic port
DiagnosticsServer aDiagnosticsServer = new DiagnosticsServer(port,queue,aClientListener);
// System.out.println("Server is running on port " + port + "...");
// System.out.println("Connect to nPort");
catch(Exception e)
// System.out.println("ERROR: Server port " + port + " not available");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Server port " + port + " not available", JOptionPane.ERROR_MESSAGE);
serverAlive = false;
System.exit(1);
while(serverAlive&&aClientListener.hostSocket.isConnected()){
try{
// connect the client
Socket aClient = aServerSocket.accept();
//System.out.println("open client connection");
//System.out.println("client local: "+ aClient.getLocalAddress().toString());
// System.out.println("client localport: "+ aClient.getLocalPort());
// System.out.println("client : "+ aClient.getInetAddress().toString());
// System.out.println("client port: "+ aClient.getLocalPort());
// make a new client thread
ClientWorker clientThread = new ClientWorker(aClient, queue, aClientListener, false);
// start thread
clientThread.start();
catch(Exception e)
//System.out.println("ERROR: Client connection failure");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Client connection failure", JOptionPane.ERROR_MESSAGE);
}// end while
} // end constructor Server
void serverExit(){
JOptionPane.showMessageDialog(null, "Server ","ERROR: nPort Failure", JOptionPane.ERROR_MESSAGE);
System.exit(1);
}// end class Server
*** connect to another server
public class ClientListener extends Thread{
InetAddress hostName;
int hostPort;
Socket hostSocket;
BufferedReader in;
PrintWriter out;
boolean loggedIn;
LinkedList queue; // reference to Server queue
Server serverRef; // reference to main server
* ClientListener connects to the host server.
* @param aHostName is the name of the host eg server name or IP address.
* @param aHostPort is a port number of the host.
* @param aLoginName is the users login name.
public ClientListener(InetAddress aHostName, int aHostPort,LinkedList aQueue,Server aServer) // reference to Server queue)
hostName = aHostName;
hostPort = aHostPort;
queue = aQueue;
serverRef = aServer;
// connect to the server
try{
hostSocket = new Socket(hostName, hostPort);
catch(IOException e){
//System.out.println("ERROR: Connection Host Failed");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Connection to nPort Failed", JOptionPane.ERROR_MESSAGE);
System.exit(0);
} // end constructor ClientListener
** multi client connection server
ClientWorker(Socket aSocket,LinkedList aQueue, ClientListener aClientListener, boolean diagnostics){
queue = aQueue;
addToQueue(this);
client = aSocket;
clientRef = aClientListener;
aDiagnostic = diagnostics;
} // end constructor ClientWorker
* run method is the main loop of the server program
* in change of handle new client connection as well
* as handle all messages and errors.
public void run(){
boolean alive = true;
String aSubString = "";
in = null;
out = null;
loginName = "";
loggedIn = false;
while (alive && client.isConnected()&& clientRef.hostSocket.isConnected()){
try{
in = new BufferedReader(new InputStreamReader(client.getInputStream()));
out = new PrintWriter(new OutputStreamWriter(client.getOutputStream()));
if(aDiagnostic){
out.println("WELCOME to diagnostics");
broadCastDia("Connect : diagnostics "+client.getInetAddress().toString());
out.flush();
else {
out.println("WELCOME to Troy's Server");
broadCastDia("Connect : client "+client.getInetAddress().toString());
out.flush();
String line;
while(((line = in.readLine())!= null)){
StringTokenizer aStringToken = new StringTokenizer(line, " ");
if(!aDiagnostic){
broadCastDia(line);
clientRef.sendMessage(line); // send mesage out to netExpress
out.println(line);
out.flush();
else{
if(line.equals("GETIPS"))
getIPs();
else{
clientRef.sendMessage(line); // send mesage out to netExpress
out.println(line);
out.flush();
} // end while
catch(Exception e){
// System.out.println("ERROR:Client Connection reset");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR:Client Connection reset", JOptionPane.ERROR_MESSAGE);
try{
if(aDiagnostic){
broadCastDia("Disconnect : diagnostics "+client.getInetAddress().toString());
out.flush();
else {
broadCastDia("Disconnect : client "+client.getInetAddress().toString());
out.flush();
// close the buffers and connection;
in.close();
out.close();
client.close();
// System.out.println("out");
// remove from list
removeThreadQueue(this);
alive = false;
catch(Exception e){
// System.out.println("ERROR: Client Connection reset failure");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Client Connection reset failure", JOptionPane.ERROR_MESSAGE);
}// end while
} // end method run
* method run - Generates io stream for communicating with the server and
* starts the client gui. Run also parses the input commands from the server.
public void run(){
boolean alive = true;
try{
// begin to life the gui
// aGuiClient = new ClientGui(hostName.getHostName(), hostPort, loginName, this);
// aGuiClient.show();
in = new BufferedReader(new InputStreamReader(hostSocket.getInputStream()));
out = new PrintWriter(new OutputStreamWriter(hostSocket.getOutputStream()));
while (alive && hostSocket.isConnected()){
String line;
while(((line = in.readLine())!= null)){
System.out.println(line);
broadCast(line);
} // end while
} // end while
catch(Exception e){
// System.out.println("ERRORa Connection to host reset");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Connection to nPort reset", JOptionPane.ERROR_MESSAGE);
try{
hostSocket.close();
}catch(Exception a){
JOptionPane.showMessageDialog(null, (a.toString()),"ERROR: Exception", JOptionPane.ERROR_MESSAGE);
alive = false;
System.exit(1);
} // end method run -
Problem with threads and camera.
Hi everybody!
I've a problem with taking snapshot.
I would like to display a loading screen after it take snapshot ( sometimes i
have to wait few seconds after i took snapshot. Propably photo is being taken in time where i have to wait).
I was trying to use threads but i didn't succeed.
I made this code:
display.setCurrent(perform);
new Thread(new Runnable(){
public void run() {
while((!performing.isShown()) && (backgroundCamera.isShown())){
Thread.yield();
notifyAll();
}).start();
new Thread(new Runnable(){
public void run() {
try {
this.wait();
} catch(Exception e) {
exceptionHandler(e);
photo = camera.snapshot();
display.setCurrent(displayPhoto);
}).start();This code is sometimes showing performing screen but sometimes no.
I don't know why. In my opinion performing.isShown() method isn't working correctly.
Does anyone have some idea how to use threads here?Hi,
I've finally managed to work this fine.
The code:
Object o = new Object();
display.setCurrent(perform);
new Thread(new Runnable(){
public void run() {
while(!performing.isShown()){
Thread.yield();
synchronized(o) {
o.notify();
}).start();
new Thread(new Runnable(){
public void run() {
try {
synchronized(o) {
o.wait(1);
} catch(Exception e) {
exceptionHandler(e);
photo = camera.snapshot();
display.setCurrent(displayPhoto);
}).start(); -
We have a problem where our application stops responding after a few days of usage. Things will for fine for a day or two, and then pretty quickly threads will start getting hung up, usually in places where they are allocating memory
We are running WebLogic 8.1 SP2 on Sun JDK 1.4.2_04 on Solaris 8 using the alternate threading model and the -server hotspot vm. We are running pretty much the same code that we had no problems with under WebLogic 6.1 SP4 and Sun JDK 1.3.1.
A thread dump usually shows that some or all of our execute threads are in the state "waiting for monitor entry" even though they are not currently waiting on any java locks. Here is a sample thread from the thread dump (we have ~120 threads so I don't want to post the full dump).
=============================================================================================
"ExecuteThread: '8' for queue: 'itgCrmWarExecutionQueue'" daemon prio=5 tid=0x005941d0 nid=0x2c waiting for monitor entry [c807f000..c807fc28]
at java.lang.String.substring(String.java:1446)
at java.lang.String.substring(String.java:1411)
at weblogic.servlet.internal.ServletRequestImpl.getRelativeUri(ServletRequestImpl.java:1872)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3492)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2585)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)
=============================================================================================
String.java line 1446 for this jdk allocates a new String object, and all the other threads in this state also are creating new objects or arrays, etc.
We've done a pstack on this process when it's in this state, and the threads that are in the "waiting for monitor entry" that look like they're allocating memory are all waiting on the same lwp_mutex_lock with some allocation method that's calling into the native TwoGenerationCollectorPolicy.mem_allocate_work (see pstack output below for the same thread as in the thread dump above)
=============================================================================================
----------------- lwp# 44 / thread# 44 --------------------
ff31f364 lwp_mutex_lock (e3d70)
fee92384 __1cNObjectMonitorGenter26MpnGThread__v_ (5000, 525c, 5000, 50dc, 4800, 4af0) + 2d8
fee324d4 __1cSObjectSynchronizerKfast_enter6FnGHandle_pnJBasicLock_pnGThread__v_ (c807f65c, c807f7d4, 5941d0, 0, 35d654, fee328ec) + 68
fee32954 __1cQinstanceRefKlassZacquire_pending_list_lock6FpnJBasicLock__v_ (c807f7d4, ff170000, d4680000, 4491d4, fee1bc2c,
0) + 78
fee3167c __1cPVM_GC_OperationNdoit_prologue6M_i_ (c807f7bc, 4400, ff170000, 2d2b8, 4a6268, c807fa18) + 38
fee2e0b0 __1cIVMThreadHexecute6FpnMVM_Operation__v_ (c807f7bc, 963a8, 0, 0, 1, 0) + 90
fed2c2a4 __1cbCTwoGenerationCollectorPolicyRmem_allocate_work6MIii_pnIHeapWord__ (962c0, ff1c29ec, ff1c297c, ff131a26, 4800, 4998) + 160
fed22940 __1cNinstanceKlassRallocate_instance6MpnGThread__pnPinstanceOopDesc__ (ee009020, 5941d0, 15ca581, 3647f0, 4a6268, c807f8c8) + 180
fed34928 __1cLOptoRuntimeFnew_C6FpnMklassOopDesc_pnKJavaThread__v_ (ee009018, 5941d0, 0, 0, 0, 0) + 28
fa435a58 ???????? (ee009018, e86de, 15ca4de, 50dc, 5941d0, c807f9c8)
fb36f9a4 ???????? (0, d412ccd8, ee046c28, ff170000, 0, 0)
fad8b278 ???????? (ee046c28, d6000c90, ee046530, 8, db8e8450, c807f9e8)
fad62abc ???????? (d412ccd8, ee046530, d6000c90, ee3bfa38, 8, c807fa18)
fa4b3c38 ???????? (c807fb9c, 0, f2134700, fa415e50, 8, c807faa8)
fa40010c ???????? (c807fc28, c807fe90, a, ee9e1e20, 4, c807fb40)
fed5d48c __1cJJavaCallsLcall_helper6FpnJJavaValue_pnMmethodHandle_pnRJavaCallArguments_pnGThread__v_ (c807fe88, c807fcf0, c807fda8, 5941d0, 5941d0, c807fd00) + 27c
fee4b784 __1cJJavaCallsMcall_virtual6FpnJJavaValue_nLKlassHandle_nMsymbolHandle_4pnRJavaCallArguments_pnGThread__v_ (ff170000, 594778, c807fd9c, c807fd98, c807fda8, 5941d0) + 164
fee5e8dc __1cJJavaCallsMcall_virtual6FpnJJavaValue_nGHandle_nLKlassHandle_nMsymbolHandle_5pnGThread__v_ (c807fe88, c807fe84, c807fe7c, c807fe74, c807fe6c, 5941d0) + 6c
fee6fc74 __1cMthread_entry6FpnKJavaThread_pnGThread__v_ (5941d0, 5941d0, 838588, 594778, 306d10, fee69254) + 128
fee6927c __1cKJavaThreadDrun6M_v_ (5941d0, 2c, 40, 0, 40, 0) + 284
fee6575c _start (5941d0, fa1a1600, 0, 0, 0, 0) + 134
ff3758c0 lwpstart (0, 0, 0, 0, 0, 0)
=============================================================================================
Also when it's having this problem, the "VM Thread" is always using a lot of processor time. We did a couple of pstacks today while it was having this problem, and this thread was stuck in the ONMethodSweeper.sweep for over 15 minutes when we finally killed the server.
From the thread dump:
"VM Thread" prio=5 tid=0x000e2d20 nid=0x2 runnable
From the first pstack:
=============================================================================================
----------------- lwp# 2 / thread# 2 --------------------
fed40c04 __1cXvirtual_call_RelocationIparse_ic6FrpnICodeBlob_rpC5rppnHoopDesc_pi_nNRelocIterator__ (42a2f4, fa5fa46d, ffffffff, fc4ffcb8, 42a2f4, 42a324) + 124
fed46318 __1cKCompiledIC2t5B6MpnKRelocation__v_ (42a2f0, fc4ffd24, fc4ffd4c, e802, 0, 6) + 38
fed90c38 __1cHnmethodVcleanup_inline_caches6M_v_ (fa5f7f88, fa608940, 1, 0, fa400000, 6) + 1ac
fede18b4 __1cONMethodSweeperFsweep6F_v_ (2cf38, 0, ffffffff, ff1cf1fc, ff1c66e8, fede1d44) + 1b0
fede1e6c __1cUSafepointSynchronizeFbegin6F_v_ (2cf38, ff1ba138, 5000, 50dc, 5000, 525c) + 248
feef1fd4 __1cIVMThreadEloop6M_v_ (4400, 4000, 4324, 4000, 42b0, 3800) + 3d4
feef1ae4 __1cIVMThreadDrun6M_v_ (e2d20, 2, 40, 0, 40, 0) + 8c
fee6575c _start (e2d20, ff270200, 0, 0, 0, 0) + 134
ff3758c0 lwpstart (0, 0, 0, 0, 0, 0)
=============================================================================================
Second pstack
=============================================================================================
----------------- lwp# 2 / thread# 2 --------------------
fed41180 __1cXvirtual_call_RelocationIparse_ic6FrpnICodeBlob_rpC5rppnHoopDesc_pi_nNRelocIterator__ (0, ff1b9664, ffffffff, fc4ffcb8, a6f2cc, fc4ffbd0) + 6a0
fed46318 __1cKCompiledIC2t5B6MpnKRelocation__v_ (a6f2c8, fc4ffd24, fc4ffd4c, e802, 0, 6) + 38
fed90c38 __1cHnmethodVcleanup_inline_caches6M_v_ (faded4c8, fadf2c80, 1, 0, fa400000, 6) + 1ac
fede18b4 __1cONMethodSweeperFsweep6F_v_ (2cf38, 0, ffffffff, ff1cf1fc, ff1c66e8, fede1d44) + 1b0
fede1e6c __1cUSafepointSynchronizeFbegin6F_v_ (2cf38, ff1ba138, 5000, 50dc, 5000, 525c) + 248
feef1fd4 __1cIVMThreadEloop6M_v_ (4400, 4000, 4324, 4000, 42b0, 3800) + 3d4
feef1ae4 __1cIVMThreadDrun6M_v_ (e2d20, 2, 40, 0, 40, 0) + 8c
fee6575c _start (e2d20, ff270200, 0, 0, 0, 0) + 134
ff3758c0 lwpstart (0, 0, 0, 0, 0, 0)
=============================================================================================
Has anyone ever seen anything like this? I'm trying to figure out if this is caused by something we're doing, or something relating to our environment and jvm options. Any ideas?Thanks for the reply - I'm testing our app with the +UseConcMarkSweepGC now in our test environment to make sure it doesn't cause any problems there. Unfortunately the only place we've had this problem is on the production server, so it's extra difficult debugging this.
We're using the following memory options:
-ms512m -mx512m -XX:NewSize=128m -XX:PermSize=192m -XX:MaxNewSize=128m -XX:MaxPermSize=192m -XX:SurvivorRatio=8and the following debugging options, as we've also been seeing OutOfMemoryErrors ( see http://forum.java.sun.com/thread.jsp?forum=37&thread=522354&tstart=45&trange=15 )
-verbosegc -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintHeapAtGCBTW, which c++filt version and options are you using? Our Solaris boxes only seem to have the GNU version installed. I was trying to run that on some of the other stack traces and wasn't getting anywhere, and didn't know if because it was GNU version wouldn't work on something compiled with the Sun compiler.
Thanks!
--Andy -
Problem with threads and ProgressMonitor
Dear Friends:
I have a little problem with a thread and a ProgressMonitor. I have a long time process that runs in a thread (the thread is in an separate class). The thread has a ProgressMonitor that works fine and shows the tasks progress.
But I need deactivate the main class(the main class is the user interface) until the thread ends.
I use something like this:
LongTask myTask=new LongTask();
myTask.start();
myTask.join();
Now, the main class waits for the task to end, but the progress monitor don`t works fine: it shows only the dialog but not the progress bar.
What's wrong?Is the dialog a modal dialog? This can block other UI updates.
In general, you should make sure that it isn't modal, and that your workThread has a fairly low priority so that the UI can do its updating
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