SetDefaultCloseOperation problems
Hi.
I'm writing a Swing application that has one parent JFrame subclass that, after a JButton press, opens a new JFrame subclass window. I have used setDefaultCloseOperation to HIDE_ON_CLOSE() for the child JFrame, but for some reason, whenever I close this window, the entire application exits.
Can anyone help me out with an explanation?
Does this do what you want?import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Test extends JFrame {
public Test (boolean main) {
setTitle (main ? "parent" : "child");
setDefaultCloseOperation (main ? EXIT_ON_CLOSE : HIDE_ON_CLOSE);
JComponent component;
if (main) {
component = new JButton (new AbstractAction ("Open new frame") {
public void actionPerformed (ActionEvent event) {
new Test (false);
} else {
component = new JLabel ("I'm a new frame!");
getContentPane ().setLayout (new GridBagLayout ());
getContentPane ().add (component, new GridBagConstraints ());
pack ();
setLocationRelativeTo (null);
setVisible (true);
public static void main (String[] parameters) {
new Test (true);
}Kind regards,
Levi
Similar Messages
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Problem with threads in my swing application
Hi,
I have some problem in running my swing app. Thre problem is related to threads.
What i am developing, is a gui framework where i can add different pluggable components to the framework.
The framework is working fine, but when i press the close action then the gui should close down the present component which is active. The close action is of the framework and the component has the responsibility of checking if it's work is saved or not and hence to throw a message for saving the work, therefore, what i have done is that i call the close method for the component in a separate thread and from my main thread i call the join method for the component's thread.But after join the whole gui hangs.
I think after the join method even the GUI thread , which is started for every gui, also waits for the component's thread to finish but the component thread can't finish because the gui thread is also waiting for the component to finish. This creates a deadlock situation.
I dont know wht's happening it's purely my guess.
One more thing. Why i am calling the component through a different thread, is because , if the component's work is not saved by the user then it must throw a message to save the work. If i continue this message throwing in my main thread only then the main thread doesnt wait for user press of the yes no or cancel button for saving the work . It immediately progresses to the next statement.
Can anybody help me get out of this?
Regards,
amazing_javaFor my original bad thread version, I have rewritten it mimicking javax.swing.Timer
implementation, reducing average CPU usage to 2 - 3%.
Will you try this:
import javax.swing.*;
import java.awt.*;
import java.text.*;
import java.util.*;
public class SamurayClockW{
JFrame frame;
Container con;
ClockTextFieldW ctf;
public SamurayClockW(){
frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
con = frame.getContentPane();
ctf = new ClockTextFieldW();
con.add(ctf, BorderLayout.SOUTH);
frame.setBounds(100, 100, 300, 300);
frame.setVisible(true);
ctf.start();
public static void main(String[] args){
new SamurayClockW();
class ClockTextFieldW extends JTextField implements Runnable{
String clock;
boolean running;
public ClockTextFieldW(){
setEditable(false);
setHorizontalAlignment(RIGHT);
public synchronized void start(){
running = true;
Thread t = new Thread(this);
t.start();
public synchronized void stop(){
running = false;
public synchronized void run(){
SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
try{
while (running){
clock = sdf.format(new Date());
SwingUtilities.invokeLater(new Runnable(){
public void run(){
setText(clock);
try{
wait(1000);
catch (InterruptedException ie){
ie.printStackTrace();
catch (ThreadDeath td){
running = false;
} -
Problem with threads in JFrame
Hy everyone...i have a small problem when i try to insert clock in my JFrame , because all i get is an empty text field.
What i do is that i create inner class that extends Thread and implements Runnable , but i dont know ... i saw some examples on the intrnet...but they are all for Applets...
Does any one know how i can implement this in JFrame (JTextField in JFrame).
Actually any material on threads in JFrame or JPanel would be great....THNX.For my original bad thread version, I have rewritten it mimicking javax.swing.Timer
implementation, reducing average CPU usage to 2 - 3%.
Will you try this:
import javax.swing.*;
import java.awt.*;
import java.text.*;
import java.util.*;
public class SamurayClockW{
JFrame frame;
Container con;
ClockTextFieldW ctf;
public SamurayClockW(){
frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
con = frame.getContentPane();
ctf = new ClockTextFieldW();
con.add(ctf, BorderLayout.SOUTH);
frame.setBounds(100, 100, 300, 300);
frame.setVisible(true);
ctf.start();
public static void main(String[] args){
new SamurayClockW();
class ClockTextFieldW extends JTextField implements Runnable{
String clock;
boolean running;
public ClockTextFieldW(){
setEditable(false);
setHorizontalAlignment(RIGHT);
public synchronized void start(){
running = true;
Thread t = new Thread(this);
t.start();
public synchronized void stop(){
running = false;
public synchronized void run(){
SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
try{
while (running){
clock = sdf.format(new Date());
SwingUtilities.invokeLater(new Runnable(){
public void run(){
setText(clock);
try{
wait(1000);
catch (InterruptedException ie){
ie.printStackTrace();
catch (ThreadDeath td){
running = false;
} -
Problem with PDFBox-0.7.3 library - Runtime Error
Hello,
The problem is inside the method "chamaConversor".
" conversor.pdfToText(arquivoPdf,arquivoTxt);" make a file.txt from one file.pdf. After that it don?t return the control to "ConstrutorDeTemplate2.java", and show the following error message:
Exception in thread "AWT-EventQueue-O" java.lang.NoClassDefFoundError : org/fontbox/afm/FontMetric
at org.pdfbox.pdmodel.font.PDFont.getAFM (PDFont.java:334)
I am using the NetBeans IDE 5.5.
I have added all of these libraries below to my project from c:\Program Files\netbeans-5.5\PDFBox-0.7.3\external:
* FontBox-0.1.0-dev.jar
* ant.jar
* bcmail-jdk14-132.jar
* junit.jar
* bcprov-jdk14-132.jar
* lucene-core-2.0.0.jar
* checkstyle-all-4.2.jar
* lucene-demos-2.0.0.jar
and PDFBox-0.7.3.jar from c:\Program Files\netbeans-5.5\PDFBox-0.7.3\lib.
There are no more jar from PDFBox-0.7.3 directory.
All of these libraries are in "Compile-time Libraries" option in Project Properties. Should I add they to "Run-time Libraries" option?
What is going on?
Thank you!
* ConstrutorDeTemplate2.java
* Created on 11 de Agosto de 2007, 14:54
* @author
package br.unifacs.dis2007.template2;
// Java core packages
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.text.*;
import java.util.*;
// Java extension packages
import javax.swing.*;
import org.pdfbox.*;
public class ConstrutorDeTemplate2 extends JFrame
implements ActionListener {
private JTextField enterField;
private JTextArea outputArea;
private BufferedWriter out;
private String word;
private PdfToText conversor = new PdfToText();
// ajusta a interface do usu?rio
public ConstrutorDeTemplate2()
super( "Testing class File" );
enterField = new JTextField("Digite aqui o nome do arquivo :" );
enterField.addActionListener( this );
outputArea = new JTextArea();
ScrollPane scrollPane = new ScrollPane();
scrollPane.add( outputArea );
Container container = getContentPane();
container.add( enterField, BorderLayout.NORTH );
container.add( scrollPane, BorderLayout.CENTER );
setSize( 400, 400 );
show();
// Exibe as informa??es sobre o arquivo especificado pelo usu?rio
public void actionPerformed( ActionEvent actionEvent )
File name = new File( actionEvent.getActionCommand() );
// Se o arquivo existe, envia para a sa?da as informa??es sobre ele
if ( name.exists() ) {
outputArea.setText(
name.getName() + " exists\n" +
( name.isFile () ?
"is a file\n" : "is not a file\n" ) +
( name.isDirectory() ?
"is a directory\n" : "is not a directory\n" ) +
( name.isAbsolute() ? "is absolute path\n" :
"is not absolute path\n" ) +
"Last modified: " + name.lastModified() +
"\nLength: " + name.length () +
"\nPath: " + name.getPath() +
"\nAbsolute path: " + name.getAbsolutePath() +
"\nParent: " + name.getParent() );
// informa??o de sa?da se "name" ? um arquivo
if ( name.isFile() ) {
String nameString = String.valueOf(name.getPath());
String nameTeste = new String(nameString);
if (nameString.endsWith(".pdf"))
nameTeste = chamaConversor(nameString);
else
if (nameString.endsWith(".doc"))
nameTeste = chamaConversorDoc(nameString); // chama conversor de arquivos DOC
else
if (nameString.endsWith(".txt"))
nameTeste = nameString;
// se o arquivo termina com ".txt"
if (nameTeste.endsWith(".txt"))
// acrescenta conte?do do arquivo ? ?rea de sa?da
try {
// Create the tokenizer to read from a file
FileReader rd = new FileReader(nameTeste);
StreamTokenizer st = new StreamTokenizer(rd);
// Prepare the tokenizer for Java-style tokenizing rules
st.parseNumbers();
st.wordChars('_', '_');
st.eolIsSignificant (true);
// If whitespace is not to be discarded, make this call
st.ordinaryChars(0, ' ');
// These calls caused comments to be discarded
st.slashSlashComments(true);
st.slashStarComments(true);
// Parse the file
int token = st.nextToken();
String word_ant = "";
outputArea.append( " \n" );
out = new BufferedWriter(new FileWriter(nameTeste, true));
while (token != StreamTokenizer.TT_EOF) {
token = st.nextToken();
if (token == StreamTokenizer.TT_EOL){
//out.write(word);
out.flush();
out = new BufferedWriter(new FileWriter(nameTeste, true));
//outputArea.append( word + "\n" );
// out.append ( "\n" );
switch (token) {
case StreamTokenizer.TT_NUMBER:
// A number was found; the value is in nval
double num = st.nval;
break;
case StreamTokenizer.TT_WORD:
// A word was found; the value is in sval
word = st.sval;
// if (word_ant.equals("a") || word_ant.equals("an") || word_ant.equals("the") || word_ant.equals("The") || word_ant.equals("An"))
outputArea.append( word.toString() + " \n " );
// out.append( word + " " );
// word_ant = word;
break;
case '"':
// A double-quoted string was found; sval contains the contents
String dquoteVal = st.sval;
break;
case '\'':
// A single-quoted string was found; sval contains the contents
String squoteVal = st.sval;
break;
case StreamTokenizer.TT_EOL:
// End of line character found
break;
case StreamTokenizer.TT_EOF:
// End of file has been reached
break;
default:
// A regular character was found; the value is the token itself
char ch = (char)st.ttype;
break;
} // fim do switch
} // fim do while
rd.close();
out.close();
} // fim do try
// process file processing problems
catch( IOException ioException ) {
JOptionPane.showMessageDialog( this,
"FILE ERROR",
"FILE ERROR", JOptionPane.ERROR_MESSAGE );
} // fim do if da linha 92 - testa se o arquivo ? do tipo texto
} // fim do if da linha 78 - testa se ? um arquivo
// output directory listing
else if ( name.isDirectory() ) {
String directory[] = name.list();
outputArea.append( "\n\nDirectory contents:\n");
for ( int i = 0; i < directory.length; i++ )
outputArea.append( directory[ i ] + "\n" );
} // fim do else if da linha 184 - testa se ? um diret?rio
} // fim do if da linha 62 - testa se o arquivo existe
// not file or directory, output error message
else {
JOptionPane.showMessageDialog( this,
actionEvent.getActionCommand() + " Does Not Exist",
"ERROR", JOptionPane.ERROR_MESSAGE );
} // fim do m?todo actionPerformed
// m?todo que chama o conversor
public String chamaConversor(String arquivoPdf){
String arquivoTxt = new String(arquivoPdf);
arquivoTxt = arquivoPdf.replace(".pdf", ".txt");
try {
conversor.pdfToText(arquivoPdf,arquivoTxt);
catch (Exception ex) {
ex.printStackTrace();
return (arquivoTxt);
// executa a aplica??o
public static void main( String args[] )
ConstrutorDeTemplate2 application = new ConstrutorDeTemplate2();
application.setDefaultCloseOperation (
JFrame.EXIT_ON_CLOSE );
} // fim do m?todo main
} // fim da classe ExtratorDeSubstantivos2
* PdfToText.java
* Created on 11 de Agosto de 2007, 10:57
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
//package br.unifacs.dis2007.template2;
* @author www
package br.unifacs.dis2007.template2;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.net.MalformedURLException;
import java.net.URL ;
import org.pdfbox.pdmodel.PDDocument;
import org.pdfbox.pdmodel.encryption.AccessPermission;
import org.pdfbox.pdmodel.encryption.StandardDecryptionMaterial;
import org.pdfbox.util.PDFText2HTML;
import org.pdfbox.pdmodel.font.PDFont.* ;
import org.pdfbox.util.PDFTextStripper;
import org.pdfbox.util.*;
import org.pdfbox.pdmodel.*;
public class PdfToText
public void pdfToText( String pdfFile, String textFile) throws Exception
Writer output = null;
PDDocument document = null;
try
try
//basically try to load it from a url first and if the URL
//is not recognized then try to load it from the file system.
URL url = new URL( pdfFile );
document = PDDocument.load( url );
String fileName = url.getFile();
if( textFile == null && fileName.length () >4 )
File outputFile =
new File( fileName.substring( 0,fileName.length() -4 ) + ".txt" );
textFile = outputFile.getName();
catch( MalformedURLException e )
document = PDDocument.load( pdfFile );
if( textFile == null && pdfFile.length() >4 )
textFile = pdfFile.substring( 0,pdfFile.length() -4 ) + ".txt";
//use default encoding
output = new OutputStreamWriter( new FileOutputStream( textFile ) );
PDFTextStripper stripper = null;
stripper = new PDFTextStripper();
stripper.writeText( document, output );
finally
if( output != null )
output.close();
if( document != null )
document.close();
}//finally
}//end funcao
All of these libraries are in "Compile-time
Libraries" option in Project Properties. Should I add
they to "Run-time Libraries" option?Yes -
ActionListener Problem - Event not triggering properly
Hello,
I have slight problem ith action listeners. Below is an exercise from a book on java i'm reading. I have constructed rectangle with 3 circles inside.
When the button in one panel is pushed the colors of these cicles should change from green,black,black to black,yellow,black to black,black,red and start over.
When the button is clicked the event isn't triggered. However when I push the button and click the frame of the window the colors change.
I would be grateful if anyone could explain why this is happening?
// Zepang
import javax.swing.*;
import java.awt.*;
public class Pp415
public static void main(String [] args)
JFrame frame = new JFrame("Traffic Lights");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Prime panel = new Prime();
frame.getContentPane().add(panel);
frame.pack();
frame.setVisible(true);
JButton lightButton = new JButton("Change the Lights!");
lightButton.addActionListener(this);
buttonLight.add(lightButton);
add(buttonLight);
add(light);
int color = 0;
public void actionPerformed (ActionEvent event)
Color g = light.getGreenLight();
Color y= light.getYellowLight();
Color r= light.getRedLight();
if (g.equals(Color.green))
light.setGreenLight(Color.black);
light.setYellowLight(Color.yellow);
if (y.equals(Color.yellow))
light.setYellowLight(Color.black);
light.setRedLight(Color.red);
if (r.equals(Color.red))
light.setRedLight(Color.black);
light.setGreenLight(Color.green);
import javax.swing.*;
import java.awt.*;
class TrafficLight extends JPanel
Color redLight = Color.black;
Color yellowLight = Color.black;
Color greenLight = Color.green;
public TrafficLight()
setBackground(Color.black);
setPreferredSize(new Dimension (200,300));
public void setRedLight(Color c)
redLight = c;
public void setYellowLight(Color c)
yellowLight = c;
public void setGreenLight(Color c)
greenLight = c;
public Color getRedLight()
return redLight;
public Color getGreenLight()
return greenLight;
public Color getYellowLight()
return yellowLight;
public void paintComponent(Graphics page)
final int C = 25;
page.setColor(Color.blue);
page.fillRect(C, C, 100, 250);
page.setColor(greenLight);
page.fillOval(C+10,C+5,80,80);
page.setColor(yellowLight);
page.fillOval(C+10,C+90,80,80);
page.setColor(redLight);
page.fillOval(C+10,C+170,80,80);
}Edited by: Zepang on Dec 4, 2008 4:24 PM
Edited by: Zepang on Dec 4, 2008 4:25 PMI don't in general do GUI stuff. But I can see for sure that you're never telling the system that it needs to repaint when you change state. That's why it doesn't show up until you cause an external event causing it to repaint itself, such as resizing the frame or dragging another window across the window.
-
I am using JDK1.4 and working on Windows Xp.
I have written a code for application in java as follows:
import javax.swing.*;
public class sample
JPanel panel;
static JFrame frame;
JButton but;
public sample()
frame=new JFrame("frame");
panel=new JPanel();
frame.getContentPane().add(panel);
but=new JButton("click");
panel.add(but);
public static void main(String args[])
sample s=new sample();
frame.setSize(300,300);
frame.setVisible(true);
on executing program application window has appeared and it ran properly.
Then I closed that application window.But after that in command prompt window curser was just blinking and it was not allow to enter also.
I have tried pressing CTRL+C also.But situation in command prompt was same i.e curser in command prompt was just blinking.
Then I closed cmd window ;but one error has occured saying that cmd window can not close .
My friend has told me that she is also having windows xp and JDK1.4 ; ctrl+c is working properly in her command prompt.She has written the above same code in her computer and it executes properly.
Even though she has not written following statement:
"frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);"
when she exits from application window ,her cmd window gave same problem of only blinking curser.But when she press CTRL+C ; her command prompt starts responding by giving root.But my command prompt is not giving
positive responce to "ctrl+c" when I am exiting java application.
Is it possible to solve this problem without giving statement
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); ?
Why my command prompt is not responding to CTRL+c?
How can I tackle this problem ?
Is there any other key which can be used in command prompt of Windows Xp?Is it possible to solve this problem without giving
statement
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
?this is because Swing have started some non-daemon helper threads for its internal purposes and the default close operation for frame is just HIDE_ON_CLOSE. So, the system will not exit because those non-daemon thread still not terminated.
What is the problems setting the default close operation to JFrame.EXIT_ON_CLOSE ? -
Java Swing application problem in Windows vista
When we execute the Swing application in windows vista environment.
The look and feel of the swing components are displayed improperly.
Do we need to put any specific look and feel for windows vista environment or any specific hardware configuration is required to setup windows vista environment.
Please give some inputs to solve the problem.
We have tried with the following sample code to run in windows vista.
* Vista.java
* Created on December 5, 2006, 5:39 PM
public class Vista extends javax.swing.JFrame {
/** Creates new form Vista */
public Vista() {
initComponents();
pack();
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
// <editor-fold defaultstate="collapsed" desc=" Generated Code ">//GEN-BEGIN:initComponents
private void initComponents() {
jButton1 = new javax.swing.JButton();
jToggleButton1 = new javax.swing.JToggleButton();
jPanel1 = new javax.swing.JPanel();
jCheckBox1 = new javax.swing.JCheckBox();
jScrollPane1 = new javax.swing.JScrollPane();
jTextArea1 = new javax.swing.JTextArea();
jTextField1 = new javax.swing.JTextField();
getContentPane().setLayout(null);
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jButton1.setText("Button 1");
getContentPane().add(jButton1);
jButton1.setBounds(20, 20, 170, 30);
jToggleButton1.setText("Togle btn");
getContentPane().add(jToggleButton1);
jToggleButton1.setBounds(100, 80, 90, 20);
jPanel1.setLayout(null);
jCheckBox1.setText("jCheckBox1");
jCheckBox1.setBorder(javax.swing.BorderFactory.createEmptyBorder(0, 0, 0, 0));
jCheckBox1.setMargin(new java.awt.Insets(0, 0, 0, 0));
jPanel1.add(jCheckBox1);
jCheckBox1.setBounds(10, 40, 130, 13);
getContentPane().add(jPanel1);
jPanel1.setBounds(10, 150, 200, 130);
jTextArea1.setColumns(20);
jTextArea1.setRows(5);
jScrollPane1.setViewportView(jTextArea1);
getContentPane().add(jScrollPane1);
jScrollPane1.setBounds(210, 150, 164, 94);
jTextField1.setText("jTextField1");
getContentPane().add(jTextField1);
jTextField1.setBounds(240, 30, 140, 30);
pack();
}// </editor-fold>//GEN-END:initComponents
* @param args the command line arguments
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Vista().setVisible(true);
// Variables declaration - do not modify//GEN-BEGIN:variables
private javax.swing.JButton jButton1;
private javax.swing.JCheckBox jCheckBox1;
private javax.swing.JPanel jPanel1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTextArea jTextArea1;
private javax.swing.JTextField jTextField1;
private javax.swing.JToggleButton jToggleButton1;
// End of variables declaration//GEN-END:variables
}When we execute the Swing application in windows
vista environment.
The look and feel of the swing components are
displayed improperly.Improperly means what? You must be aware that Vista's native L&F certainly isn't supported yet. -
GridBagLayout and Panel Border problem
I have 3 panels like
A
B
C
and the C panel has a Mouse Listener that on a mouseEntered creates a border around the same panel and on a mouseExited clears that border.
When this border is created the A and B panels go up a little bit .. they move alone when the border is created.
Is there any way to fix this problem? Is there any way to get the panels static?
the code is close to the following:
import java.awt.*;
import javax.swing.*;
import java.awt.event.MouseListener;
import java.awt.event.MouseEvent;
import javax.swing.BorderFactory;
import javax.swing.border.Border;
import javax.swing.border.TitledBorder;
import java.awt.event.*;
import java.text.NumberFormat;
public class Game extends JFrame implements MouseListener
JPanel game, options, top, down, middle;
NumberFormat nf;
public Game() {
super("Game");
nf = NumberFormat.getPercentInstance();
nf.setMaximumFractionDigits(1);
JPanel center = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.fill = gbc.BOTH;
gbc.weighty = 1.0;
gbc.weightx = 0.8;
center.add(getGamePanel(), gbc);
gbc.weightx = 0.104;
center.add(getOptionsPanel(), gbc);
Container cp = getContentPane();
// use the JFrame default BorderLayout
cp.add(center); // default center section
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setSize(700,600);
// this.setResizable(false);
setLocationRelativeTo(null);
setVisible(true);
addComponentListener(new ComponentAdapter()
public void componentResized(ComponentEvent e)
showSizeInfo();
showSizeInfo();
private void showSizeInfo()
Dimension d = getContentPane().getSize();
double totalWidth = game.getWidth() + options.getWidth();
double gamePercent = game.getWidth() / totalWidth;
double optionsPercent = options.getWidth() / totalWidth;
double totalHeight = top.getHeight() + middle.getHeight() + down.getHeight();
double topPercent = top.getHeight() / totalHeight;
double middlePercent = middle.getHeight() / totalHeight;
double downPercent = down.getHeight() / totalHeight;
System.out.println("content size = " + d.width + ", " + d.height + "\n" +
"game width = " + nf.format(gamePercent) + "\n" +
"options width = " + nf.format(optionsPercent) + "\n" +
"top height = " + nf.format(topPercent) + "\n" +
"middle height = " + nf.format(middlePercent) + "\n" +
"down height = " + nf.format(downPercent) + "\n");
private JPanel getGamePanel()
// init components
top = new JPanel(new BorderLayout());
top.setBackground(Color.red);
top.add(new JLabel("top panel", JLabel.CENTER));
middle = new JPanel(new BorderLayout());
middle.setBackground(Color.green.darker());
middle.add(new JLabel("middle panel", JLabel.CENTER));
down = new JPanel(new BorderLayout());
down.setBackground(Color.blue);
down.add(new JLabel("down panel", JLabel.CENTER));
// layout game panel
game = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.weightx = 1.0;
gbc.fill = gbc.BOTH;
gbc.gridwidth = gbc.REMAINDER;
gbc.weighty = 0.2;
game.add(top, gbc);
gbc.weighty = 0.425;
game.add(middle, gbc);
gbc.weighty = 0.2;
game.add(down, gbc);
down.addMouseListener(this);
return game;
private JPanel getOptionsPanel()
options = new JPanel(new BorderLayout());
options.setBackground(Color.pink);
options.add(new JLabel("options panel", JLabel.CENTER));
return options;
// mouse listener events
public void mouseClicked( MouseEvent e ) {
System.out.println("pressed");
public void mousePressed( MouseEvent e ) {
public void mouseReleased( MouseEvent e ) {
public void mouseEntered( MouseEvent e ) {
Border redline = BorderFactory.createLineBorder(Color.red);
JPanel x = (JPanel) e.getSource();
x.setBorder(redline);
public void mouseExited( MouseEvent e ){
JPanel x = (JPanel) e.getSource();
x.setBorder(null);
public static void main(String[] args ) {
Game exe = new Game();
exe.show();
}import java.awt.*;
import javax.swing.*;
import javax.swing.border.*;
import java.awt.event.*;
import java.text.NumberFormat;
public class Game extends JFrame implements MouseListener{
JPanel game, options, top, down, middle;
NumberFormat nf;
public Game() {
super("Game");
nf = NumberFormat.getPercentInstance();
nf.setMaximumFractionDigits(1);
JPanel center = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.fill = gbc.BOTH;
gbc.weighty = 1.0;
gbc.weightx = 0.8;
center.add(getGamePanel(), gbc);
gbc.weightx = 0.104;
center.add(getOptionsPanel(), gbc);
Container cp = getContentPane();
// use the JFrame default BorderLayout
cp.add(center); // default center section
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setSize(700,600);
// this.setResizable(false);
setLocationRelativeTo(null);
setVisible(true);
addComponentListener(new ComponentAdapter(){
public void componentResized(ComponentEvent e){
showSizeInfo();
showSizeInfo();
private void showSizeInfo(){
Dimension d = getContentPane().getSize();
double totalWidth = game.getWidth() + options.getWidth();
double gamePercent = game.getWidth() / totalWidth;
double optionsPercent = options.getWidth() / totalWidth;
double totalHeight = top.getHeight() + middle.getHeight() + down.getHeight();
double topPercent = top.getHeight() / totalHeight;
double middlePercent = middle.getHeight() / totalHeight;
double downPercent = down.getHeight() / totalHeight;
System.out.println("content size = " + d.width + ", " + d.height + "\n" +
"game width = " + nf.format(gamePercent) + "\n" +
"options width = " + nf.format(optionsPercent) + "\n" +
"top height = " + nf.format(topPercent) + "\n" +
"middle height = " + nf.format(middlePercent) + "\n" +
"down height = " + nf.format(downPercent) + "\n");
private JPanel getGamePanel(){
// init components
top = new JPanel(new BorderLayout());
top.setBackground(Color.red);
top.add(new JLabel("top panel", JLabel.CENTER));
middle = new JPanel(new BorderLayout());
middle.setBackground(Color.green.darker());
middle.add(new JLabel("middle panel", JLabel.CENTER));
down = new JPanel(new BorderLayout());
down.setBackground(Color.blue);
down.add(new JLabel("down panel", JLabel.CENTER));
// layout game panel
game = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.weightx = 1.0;
gbc.fill = gbc.BOTH;
gbc.gridwidth = gbc.REMAINDER;
gbc.weighty = 0.2;
game.add(top, gbc);
gbc.weighty = 0.425;
game.add(middle, gbc);
gbc.weighty = 0.2;
game.add(down, gbc);
down.addMouseListener(this);
return game;
private JPanel getOptionsPanel(){
options = new JPanel(new BorderLayout());
options.setBackground(Color.pink);
options.add(new JLabel("options panel", JLabel.CENTER));
return options;
public void mouseClicked( MouseEvent e ) {
System.out.println("pressed");
public void mousePressed( MouseEvent e ) {
public void mouseReleased( MouseEvent e ) {
public void mouseEntered( MouseEvent e ) {
Border redline = new CalmLineBorder(Color.red);
JPanel x = (JPanel) e.getSource();
x.setBorder(redline);
public void mouseExited( MouseEvent e ){
JPanel x = (JPanel) e.getSource();
x.setBorder(null);
public static void main(String[] args ) {
Game exe = new Game();
exe.setVisible(true);
class CalmLineBorder extends LineBorder{
public CalmLineBorder(Color c){
super(c);
public CalmLineBorder(Color c, int thick){
super(c, thick);
public CalmLineBorder(Color c, int thick, boolean round){
super(c, thick, round);
public Insets getBorderInsets(Component comp){
return new Insets(0, 0, 0, 0);
} -
The Rules of Game of Life
For a space that is 'populated':
Each cell with one or no neighbors dies, as if by loneliness.
Each cell with four or more neighbors dies, as if by overpopulation.
Each cell with two or three neighbors survives.
For a space that is 'empty' or 'unpopulated'
Each cell with three neighbors becomes populated.
I have three classes: Cell, BoardComponent, and GameViewer
I got few problems in my code: 1. the button shows wrongly, 2. without the button, there is always a dot on the upper-left corner, which is not on purpose, 3, after click the mouse to initialize few dots, nothing happened
How could I fix those problems?
My Code:
1. Cell:
import java.awt.Rectangle;
public class Cell extends Rectangle{
public Cell(int x, int y, int side)
super(x, y, side, side);
}2. BoardComponent:
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JComponent;
import com.sun.jdi.event.Event;
public class BoardComponent extends JComponent{
public BoardComponent()
for(int i = 0; i < ROW; i++)
for(int j = 0; j < COL; j++)
board[i][j] = new Cell(i*SIDE, j*SIDE, SIDE);
public void paint(Graphics g)
Graphics2D g2 = (Graphics2D)g;
for(int i = 0; i < ROW; i++)
for(int j = 0; j < COL; j++)
g2.draw(board[i][j]);
public void initialize(int x, int y)
Graphics g = getGraphics();
Graphics2D g2 = (Graphics2D) g;
if(g2.getColor().equals(Color.BLUE))
g2.getBackground();
else
g2.setColor(Color.BLUE);
g.fillOval(mouseX, mouseY, 10, 10);
public void generate()
int count = 0;
for(int i = 0; i < ROW-2; i++)
for(int j = 0; j < COL-2; j++)
for(int m = 0; m < 2; m++)
for(int n = 0; n < 2; n++)
if(m!=0 || n !=0)
if(!(board[i+m][j+n].isEmpty()))
count++;
if(count == 3 || count < 2 || count > 4)
initialize(i*SIDE, j*SIDE);
private int mouseX, mouseY;
private boolean mouseclicked = false;
public static final int ROW = 40;
public static final int COL = 40;
private Cell[][] board = new Cell[ROW][COL];
public static final int SIDE = 14;
}3. GameViewer:
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;
public class GameViewer extends JFrame{
public static void main(String[] args)
final BoardComponent game = new BoardComponent();
class MouseClickListener extends MouseAdapter
public void mouseClicked(MouseEvent event)
int x = event.getX();
int y = event.getY();
game.initialize(x, y);
MouseAdapter listener = new MouseClickListener();
game.addMouseListener(listener);
JButton button = new JButton("Start");
class TimerListener implements ActionListener
public void actionPerformed(ActionEvent event)
game.generate();
ActionListener timer = new TimerListener();
button.setSize(40, 10);
button.setLocation(250, 500);
button.addActionListener(timer);
final int DELAY = 500;
Timer t = new Timer(DELAY, timer);
t.start();
JFrame window = new JFrame();
window.setSize(600, 600);
window.setTitle("Life of Game");
window.setDefaultCloseOperation(EXIT_ON_CLOSE);
window.add(game);
window.add(button);
window.setVisible(true);
}Thanks a million.As already said, you should override paintComponent(), not paint(), and don't forget to call the superclass's paintComponent() method.
public void paintComponent(Graphics g)
super.paintComponent(g);
}As for this method:
public void initialize(int x, int y)
Graphics g = getGraphics();
Graphics2D g2 = (Graphics2D) g;
if(g2.getColor().equals(Color.BLUE))
g2.getBackground();
else
g2.setColor(Color.BLUE);
g.fillOval(mouseX, mouseY, 10, 10);
}You really shouldn't be doing any painting outside the paintComponent() method.
Finally, your GameViewer class extends JFrame, but yet you are creating another JFrame in the main method. This doesn't make sense. -
Advance level drawing problem with Jframe and JPanel need optimize sol?
Dear Experts,
I m trying to create a GUI for puzzle game following some kind of "game GUI template", but i have problems in that,so i tried to implement that in various ways after looking on internet and discussions about drawing gui in swing, but i have problem with both of these, may be i m doing some silly mistake, which is still out of my consideration. please have a look at these two and recommend me one of them, which is running without problems (flickring and when you enlarge window the board draw copies (tiled) everywhere,
Note: i don't want to inherit jpanel or Jframe
here is my code : import java.awt.BorderLayout;
public class GameMain extends JFrame {
private static final long serialVersionUID = 1L;
public int mX, mY;
int localpoints = 0;
protected static JTextField[][] squares;
protected JLabel statusLabel = new JLabel("jugno");
Label lbl_score = new Label("score");
Label lbl_scorelocal = new Label("local score");
protected static TTTService remoteTTTBoard;
// Define constants for the game
static final int CANVAS_WIDTH = 800; // width and height of the game screen
static final int CANVAS_HEIGHT = 600;
static final int UPDATE_RATE = 4; // number of game update per second
static State state; // current state of the game
private int mState;
// Handle for the custom drawing panel
private GameCanvas canvas;
// Constructor to initialize the UI components and game objects
public GameMain() {
// Initialize the game objects
gameInit();
// UI components
canvas = new GameCanvas();
canvas.setPreferredSize(new Dimension(CANVAS_WIDTH, CANVAS_HEIGHT));
this.setContentPane(canvas);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.pack();
this.setTitle("MY GAME");
this.setVisible(true);
public void gameInit() {
// Shutdown the game, clean up code that runs only once.
public void gameShutdown() {
// To start and re-start the game.
public void gameStart() {
private void gameLoop() {
public void keyPressed(KeyEvent e) {
public void keyTyped(KeyEvent e) {
public void gameKeyReleased(KeyEvent e) {
PuzzleBoard bd = getBoard();
for (int row = 0; row < 4; ++row) {
for (int col = 0; col < 4; ++col) {
if (e.getSource() == squares[row][col]) {
if (bd.isOpen(col, row)) {
lbl_score.setText("Highest Score = "
+ Integer.toString(bd.getPoints()));
setStatus1(bd);
pickSquare1(col, row, squares[row][col].getText()
.charAt(0));
protected void pickSquare1(int col, int row, char c) {
try {
remoteTTTBoard.pick(col, row, c);
} catch (RemoteException e) {
System.out.println("Exception: " + e.getMessage());
e.printStackTrace();
System.exit(1);
// method "called" by remote object to update the state of the game
public void updateBoard(PuzzleBoard new_board) throws RemoteException {
String s1;
for (int row = 0; row < 4; ++row) {
for (int col = 0; col < 4; ++col) {
squares[row][col].setText(new_board.ownerStr(col, row));
lbl_score.setText("Highest Score = "
+ Integer.toString(new_board.getPoints()));
setStatus1(new_board);
protected void setStatus1(PuzzleBoard bd) {
boolean locals = bd.getHave_winner();
System.out.println("local win" + locals);
if (locals == true) {
localpoints++;
System.out.println("in condition " + locals);
lbl_scorelocal.setText("Your Score = " + localpoints);
lbl_score
.setText("Highest Score = " + Integer.toString(bd.getPoints()));
protected PuzzleBoard getBoard() {
PuzzleBoard res = null;
try {
res = remoteTTTBoard.getState();
} catch (RemoteException e) {
System.out.println("Exception: " + e.getMessage());
e.printStackTrace();
System.exit(1);
return res;
/** Custom drawing panel (designed as an inner class). */
class GameCanvas extends JPanel implements KeyListener {
/** Custom drawing codes */
@Override
public void paintComponent(Graphics g) {
// setOpaque(false);
super.paintComponent(g);
// main box; everything placed in this
// JPanel box = new JPanel();
setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
// add(statusLabel, BorderLayout.NORTH);
// set up the x's and o's
JPanel xs_and_os = new JPanel();
xs_and_os.setLayout(new GridLayout(5, 5, 0, 0));
squares = new JTextField[5][5];
for (int row = 0; row < 5; ++row) {
for (int col = 0; col < 5; ++col) {
squares[row][col] = new JTextField(1);
squares[row][col].addKeyListener(this);
if ((row == 0 && col == 1) || (row == 2 && col == 3)
|| (row == 1 && col == 4) || (row == 4 && col == 4)
|| (row == 4 && col == 0))
JPanel p = new JPanel(new BorderLayout());
JLabel label;
if (row == 0 && col == 1) {
label = new JLabel("1");
label.setHorizontalAlignment(JLabel.LEFT);
label.setVerticalAlignment(JLabel.TOP);
else if (row == 4 && col == 0) {// for two numbers or
// two
// blank box in on row
label = new JLabel("2");
label.setHorizontalAlignment(JLabel.LEFT);
label.setVerticalAlignment(JLabel.TOP);
else if (row == 1 && col == 4) {
label = new JLabel("3");
label.setHorizontalAlignment(JLabel.LEFT);
label.setVerticalAlignment(JLabel.TOP);
else if (row == 4) {
label = new JLabel("4");
label.setHorizontalAlignment(JLabel.LEFT);
label.setVerticalAlignment(JLabel.TOP);
else {
label = new JLabel("5");
label.setHorizontalAlignment(JLabel.LEFT);
label.setVerticalAlignment(JLabel.TOP);
label.setOpaque(true);
label.setBackground(squares[row][col].getBackground());
label.setPreferredSize(new Dimension(label
.getPreferredSize().width, squares[row][col]
.getPreferredSize().height));
p.setBorder(squares[row][col].getBorder());
squares[row][col].setBorder(null);
p.add(label, BorderLayout.WEST);
p.add(squares[row][col], BorderLayout.CENTER);
xs_and_os.add(p);
} else if ((row == 2 && col == 1) || (row == 1 && col == 2)
|| (row == 3 && col == 3) || (row == 0 && col == 3)) {
xs_and_os.add(squares[row][col]);
// board[ row ][ col ].setEditable(false);
// board[ row ][ col ].setText("");
squares[row][col].setBackground(Color.RED);
squares[row][col].addKeyListener(this);
} else {
squares[row][col] = new JTextField(1);
// squares[row][col].addActionListener(this);
squares[row][col].addKeyListener(this);
xs_and_os.add(squares[row][col]);
this.add(xs_and_os);
this.add(statusLabel);
this.add(lbl_score);
this.add(lbl_scorelocal);
public void keyPressed(KeyEvent e) {
public void keyReleased(KeyEvent e) {
gameKeyReleased(e);
public void keyTyped(KeyEvent e) {
// main
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new GameMain();
thanks a lot for your time , consideration and efforts.
jibby
Edited by: jibbylala on Sep 20, 2010 6:06 PMjibbylala wrote:
thanks for mentioning as i wasn't able to write complete context here.Yep thanks camickr. I think that Darryl's succinct reply applies here as well. -
JInternalFrame drawing problem.
Hi gurus
Please could you help with a java problem that I cant find an answer to over the net:
I have a JDesktop which contains multiple JInternalFrames. On one JInternalFrame i have attached a JPanel on which to draw on. I have multiple threads (simple ball shapes) that need to be drawn onto the JPanel and have left it up to the indivual threads to draw themselves (as opposed to using paintComponent in the JPanel class). The drawing on the JInternalFrame works perfectly fine.
The problem arises when the other JInternalFrames are placed on top of each other - the balls are drawn over the top most JInternalFrame. What am i doing wrong? I have attached snippets of the code:
public class Desktop extends JFrame implements ActionListener
public Desktop()
setTitle("Agent's world");
setSize(w,h);
setDefaultCloseOperation(EXIT_ON_CLOSE);
JDesktopPane desktop = new JDesktopPane();
setContentPane(desktop);
/************* Agent *************/
JInternalFrame agents = new JInternalFrame("Agents War", true, false, true, false);
agents.reshape(0,0,(int)((w/3)*2),h);
Container contentPane = agents.getContentPane();
canvas = new AgentPanel(agents);
contentPane.add(canvas);
/************* Button *************/
JPanel buttonPanel = new JPanel();
ButtonGroup buttonGroup = new ButtonGroup();
JButton start = new JButton("START");
start.addActionListener(this);
buttonPanel.add(start);
contentPane.add(buttonPanel, "North");
agents.setVisible(true);
desktop.add(agents);
//sets focus to other frames within the desktop
try
agents.setSelected(true);
catch(PropertyVetoException e)
//attempt to refocus was vetoed by a frame
/** Method to listen for event actions, i.e. button clicks **/
public void actionPerformed(ActionEvent event)
//passes through 'this' to allow access to the getList method
Agents agent = new Agents(canvas, this);
agent.start();
public class Agents extends Thread
public Agents(AgentPanel panel, Desktop desktop)
panel =_panel;
desktop = _desktop;
setDaemon(true);
/** Moves the agent from a spefic position to a new position **/
public void move()
Graphics g = panel.getGraphics();
Graphics2D g2 = (Graphics2D)g;
try
//set XOR mode
g.setXORMode(panel.getBackground());
//draw over old
Ellipse2D.Double ballOld = new Ellipse2D.Double(i , j, length, length);
g2.fill(ballOld);
i++;
j++;
if(flag == true)
//draw new
Ellipse2D.Double ballNew = new Ellipse2D.Double(i , j, length, length);
g2.fill(ballNew);
g2.setPaintMode();
finally
g.dispose();
/** Activates the Thread **/
public void run()
int i = 0;
while(!interrupted() && i<100)
try
for(i = 0 ; i <100 ; i++)
//draw ball in old position move();
sleep(100);
catch(InterruptedException e)
public class AgentPanel extends JPanel
/** local copy of internal frame */
private JInternalFrame frame;
public AgentPanel(JInternalFrame _frame)
frame = _frame;
setSize(frame.getWidth(), frame.getHeight());
setBackground(Color.white);
public void paintComponent(Graphics g)
super.paintComponent(g);
Thank you in advance.
RavsI have the same problem. Seems to be a bug. See:
http://forum.java.sun.com/thread.jsp?forum=57&thread=231037
Bummer. -
MDI JTable Overlap Area Repaint Problem
Hi all,
I have a problem for my application in MDI mode.
I open many windows (JInternalFrame contain JTable) under JDesktopPane. Some of the windows are overlapping and when they receive update in the table, it seems repaint all of the overlapping windows, not only itself. This make my application performance become poor, slow respond for drap & drop an existing window or open a new window.
To prove this, i make a simple example for open many simple table and have a thread to update the table's value for every 200 mill second. After i open about 20 windows, the performance become poor again.
If anyone face the same problem with me and any suggestions to solve the problem ?
Please help !!!!!
Following are my sources:
public class TestMDI extends JFrame {
private static final long serialVersionUID = 1L;
private JPanel contentPanel;
private JDesktopPane desktopPane;
private JMenuBar menuBar;
private List<TestPanel> allScreens = new ArrayList<TestPanel>();
private List<JDialog> freeFloatDialogs = new ArrayList<JDialog>();
private List<JInternalFrame> mdiInternalFrm = new ArrayList<JInternalFrame>();
int x = 0;
int y = 0;
int index = 0;
private static int MDI_MODE = 0;
private static int FREE_FLOAT_MODE = 1;
private int windowMode = MDI_MODE;
public TestMDI() {
init();
public static void main(String[] args) {
new TestMDI().show();
public void init() {
contentPanel = new JPanel();
desktopPane = new JDesktopPane();
desktopPane.setDragMode(JDesktopPane.LIVE_DRAG_MODE);
desktopPane.setFocusTraversalKeysEnabled(false);
desktopPane.setFocusTraversalPolicyProvider(false);
desktopPane.setBorder(null);
desktopPane.setIgnoreRepaint(true);
desktopPane.setPreferredSize(new Dimension(1000, 800));
this.setSize(new Dimension(1000, 800));
menuBar = new JMenuBar();
JMenu menu1 = new JMenu("Test");
JMenuItem menuItem1 = new JMenuItem("Open Lable Screen");
menuItem1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
for (int i = 1; i < 4; i++) {
final TestJLableScreen screen = new TestJLableScreen("Screen " + (allScreens.size() + 1));
screen.startTime();
if (windowMode == MDI_MODE) {
JInternalFrame frame = createInternalFram(screen);
desktopPane.add(frame);
mdiInternalFrm.add(frame);
if (allScreens.size() * 60 + 100 < 1000) {
x = allScreens.size() * 60;
y = 60;
} else {
x = 60 * index;
y = 120;
index++;
frame.setLocation(x, y);
frame.setVisible(true);
} else {
JDialog dialog = createJDialog(screen);
freeFloatDialogs.add(dialog);
if (i * 60 + 100 < 1000) {
x = i * 60;
y = 60;
} else {
x = 60 * index;
y = 120;
index++;
dialog.setLocation(x, y);
dialog.setVisible(true);
allScreens.add(screen);
JMenuItem menuItem2 = new JMenuItem("Open Table Screen");
menuItem2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
for (int i = 1; i < 4; i++) {
TestTableScreen screen = new TestTableScreen("Screen " + (allScreens.size() + 1));
screen.startTime();
if (windowMode == MDI_MODE) {
JInternalFrame frame = createInternalFram(screen);
desktopPane.add(frame);
mdiInternalFrm.add(frame);
if (allScreens.size() * 60 + 100 < 1000) {
x = allScreens.size() * 60;
y = 60;
} else {
x = 60 * index;
y = 120;
index++;
frame.setLocation(x, y);
frame.setVisible(true);
} else {
JDialog dialog = createJDialog(screen);
freeFloatDialogs.add(dialog);
if (i * 60 + 100 < 1000) {
x = i * 60;
y = 60;
} else {
x = 60 * index;
y = 120;
index++;
dialog.setLocation(x, y);
dialog.setVisible(true);
allScreens.add(screen);
menu1.add(menuItem1);
menu1.add(menuItem2);
this.setJMenuBar(menuBar);
this.getJMenuBar().add(menu1);
this.getJMenuBar().add(createSwitchMenu());
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.add(desktopPane);
desktopPane.setDesktopManager(null);
public JInternalFrame createInternalFram(final TestPanel panel) {
final CustomeInternalFrame internalFrame = new CustomeInternalFrame(panel.getTitle(), true, true, true, true) {
public void doDefaultCloseAction() {
super.doDefaultCloseAction();
allScreens.remove(panel);
internalFrame.setPanel(panel);
// internalFrame.setOpaque(false);
internalFrame.setSize(new Dimension(1010, 445));
internalFrame.add(panel);
internalFrame.setFocusTraversalKeysEnabled(false);
internalFrame.setFocusTraversalPolicyProvider(false);
desktopPane.getDesktopManager();
// internalFrame.setFocusTraversalKeysEnabled(false);
internalFrame.setIgnoreRepaint(true);
return internalFrame;
public JDialog createJDialog(final TestPanel panel) {
JDialog dialog = new JDialog(this, panel.getTitle());
dialog.setSize(new Dimension(1010, 445));
dialog.add(panel);
dialog.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
allScreens.remove(panel);
return dialog;
public JMenu createSwitchMenu() {
JMenu menu = new JMenu("Test2");
JMenuItem menuItem1 = new JMenuItem("Switch FreeFloat");
menuItem1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
windowMode = FREE_FLOAT_MODE;
for (JInternalFrame frm : mdiInternalFrm) {
frm.setVisible(false);
frm.dispose();
frm = null;
mdiInternalFrm.clear();
remove(desktopPane);
desktopPane.removeAll();
// revalidate();
repaint();
add(contentPanel);
index = 0;
for (JDialog dialog : freeFloatDialogs) {
dialog.setVisible(false);
dialog.dispose();
dialog = null;
freeFloatDialogs.clear();
for (int i = 0; i < allScreens.size(); i++) {
JDialog dialog = createJDialog(allScreens.get(i));
freeFloatDialogs.add(dialog);
if (i * 60 + 100 < 1000) {
x = i * 60;
y = 60;
} else {
x = 60 * index;
y = 120;
index++;
dialog.setLocation(x, y);
dialog.setVisible(true);
JMenuItem menuItem2 = new JMenuItem("Switch MDI");
menuItem2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
windowMode = MDI_MODE;
remove(contentPanel);
add(desktopPane);
for (int i = 0; i < freeFloatDialogs.size(); i++) {
freeFloatDialogs.get(i).setVisible(false);
freeFloatDialogs.get(i).dispose();
freeFloatDialogs.clear();
// revalidate();
repaint();
for (JInternalFrame frm : mdiInternalFrm) {
frm.setVisible(false);
frm.dispose();
frm = null;
mdiInternalFrm.clear();
index = 0;
for (int i = 0; i < allScreens.size(); i++) {
JInternalFrame frame = createInternalFram(allScreens.get(i));
desktopPane.add(frame);
mdiInternalFrm.add(frame);
if (i * 60 + 100 < 1000) {
x = i * 60;
y = 60;
} else {
x = 60 * index;
y = 120;
index++;
frame.setLocation(x, y);
frame.setVisible(true);
menu.add(menuItem1);
menu.add(menuItem2);
return menu;
public class TestTableScreen extends TestPanel {
private static final long serialVersionUID = 1L;
JTable testTable = new JTable();
MyTableModel tableModel1 = new MyTableModel(1);
private boolean notRepaint = false;
int start = 0;
JScrollPane scrollPane = new JScrollPane();
private Timer timmer = new Timer(200, new ActionListener() {
public void actionPerformed(ActionEvent e) {
Random indexRandom = new Random();
final int index = indexRandom.nextInt(50);
Random valRandom = new Random();
final int val = valRandom.nextInt(600);
SwingUtilities.invokeLater(new Runnable() {
public void run() {
notRepaint = false;
TestTableScreen.this.update(index + "|" + val);
public TestTableScreen(String title) {
this.title = title;
init();
tableModel1.setTabelName(title);
public void startTime() {
timmer.start();
public String getTitle() {
return title;
public void update(String updateStr) {
String[] val = updateStr.split("\\|");
if (val.length == 2) {
int index = Integer.valueOf(val[0]);
List vals = tableModel1.getVector();
if (vals.size() > index) {
vals.set(index, val[1]);
// tableModel1.fireTableRowsUpdated(index, index);
} else {
vals.add(val[1]);
// tableModel1.fireTableRowsUpdated(vals.size() - 1, vals.size() - 1);
tableModel1.fireTableDataChanged();
public TableModel getTableModel() {
return tableModel1;
public void init() {
testTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
testTable.setRowSelectionAllowed(true);
this.testTable.setModel(tableModel1);
int[] width = { 160, 80, 45, 98, 60, 88, 87, 88, 80, 70, 88, 80, 75, 87, 87, 41, 88, 82, 75, 68, 69 };
TableColumnModel columnModel = testTable.getColumnModel();
for (int i = 0; i < width.length; i++) {
columnModel.getColumn(i).setPreferredWidth(width[i]);
testTable.setRowHeight(20);
tableModel1.fireTableDataChanged();
this.setLayout(new BorderLayout());
TableColumnModel columnMode2 = testTable.getColumnModel();
int[] width2 = { 200 };
for (int i = 0; i < width2.length; i++) {
columnMode2.getColumn(i).setPreferredWidth(width2[i]);
scrollPane.getViewport().add(testTable);
scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
this.add(scrollPane, BorderLayout.CENTER);
class MyTableModel extends DefaultTableModel {
public List list = new ArrayList();
String titles[] = new String[] { "袨怓1", "袨怓2", "袨怓3", "袨怓4", "袨怓5", "袨怓6", "袨怓7", "袨怓8", "袨怓9", "袨怓10", "袨怓11",
"袨怓12", "袨怓13", "袨怓14", "袨怓15", "袨怓16", "袨怓17", "袨怓18", "袨怓19", "袨怓20", "袨怓21" };
String tabelName = "";
int type_head = 0;
int type_data = 1;
int type = 1;
public MyTableModel(int type) {
super();
this.type = type;
for (int i = 0; i < 50; i++) {
list.add(i);
public void setTabelName(String name) {
this.tabelName = name;
public int getRowCount() {
if (list != null) {
return list.size();
return 0;
public List getVector() {
return list;
public int getColumnCount() {
if (type == 0) {
return 1;
} else {
return titles.length;
public String getColumnName(int c) {
if (type == 0) {
return "head";
} else {
return titles[c];
public boolean isCellEditable(int nRow, int nCol) {
return false;
public Object getValueAt(int r, int c) {
if (list.size() == 0) {
return null;
switch (c) {
default:
if (type == 0) {
return r + " " + c + " test ";
} else {
return list.get(r) + " " + c;
public boolean isNotRepaint() {
return notRepaint;
public void setNotRepaint(boolean notRepaint) {
this.notRepaint = notRepaint;
public class TestPanel extends JPanel {
protected String title = "";
protected boolean needRepaint = false;
protected boolean isFirstOpen = true;
public String getTitle() {
return title;
public void setNeedRepaint(boolean flag) {
this.needRepaint = flag;
public boolean isNeedRepaint() {
return needRepaint;
public boolean isFirstOpen() {
return isFirstOpen;
public void setFirstOpen(boolean isFirstOpen) {
this.isFirstOpen = isFirstOpen;
public class TestJLableScreen extends TestPanel {
private static final long serialVersionUID = 1L;
private JLabel[] allLables = new JLabel[20];
private Timer timmer = new Timer(20, new ActionListener() {
public void actionPerformed(ActionEvent e) {
Random indexRandom = new Random();
final int index = indexRandom.nextInt(10);
Random valRandom = new Random();
final int val = valRandom.nextInt(600);
SwingUtilities.invokeLater(new Runnable() {
public void run() {
TestJLableScreen.this.setNeedRepaint(true);
TestJLableScreen.this.update(index + "|" + val);
public TestJLableScreen(String title) {
this.title = title;
init();
public void startTime() {
timmer.start();
public String getTitle() {
return title;
public void update(String updateStr) {
String[] val = updateStr.split("\\|");
if (val.length == 2) {
int index = Integer.valueOf(val[0]);
allLables[index * 2 + 1].setText(val[1]);
public void init() {
this.setLayout(new GridLayout(10, 2));
boolean flag = true;
for (int i = 0; i < allLables.length; i++) {
allLables[i] = new JLabel() {
// public void setText(String text) {
// super.setText(text);
// // System.out.println(" setText " + getTitle() + " ; " + this.getName());
public void paint(Graphics g) {
super.paint(g);
// System.out.println(" paint " + getTitle() + " ; " + this.getName());
// public void repaint() {
// super.repaint();
// System.out.println(" repaint " + getTitle() + " ; " + this.getName());
allLables[i].setName("" + i);
if (i % 2 == 0) {
allLables[i].setText("Name " + i + " : ");
} else {
allLables[i].setOpaque(true);
if (flag) {
allLables[i].setBackground(Color.YELLOW);
flag = false;
} else {
allLables[i].setBackground(Color.CYAN);
flag = true;
allLables[i].setText(i * 8 + "");
for (int i = 0; i < allLables.length; i++) {
this.add(allLables[i]);
public class CustomeInternalFrame extends JInternalFrame {
protected TestPanel panel;
public CustomeInternalFrame() {
this("", false, false, false, false);
public CustomeInternalFrame(String title) {
this(title, false, false, false, false);
public CustomeInternalFrame(String title, boolean resizable) {
this(title, resizable, false, false, false);
public CustomeInternalFrame(String title, boolean resizable, boolean closable) {
this(title, resizable, closable, false, false);
public CustomeInternalFrame(String title, boolean resizable, boolean closable, boolean maximizable) {
this(title, resizable, closable, maximizable, false);
public CustomeInternalFrame(String title, boolean resizable, boolean closable, boolean maximizable,
boolean iconifiable) {
super(title, resizable, closable, maximizable, iconifiable);
public TestPanel getPanel() {
return panel;
public void setPanel(TestPanel panel) {
this.panel = panel;i had the same problem with buttons and it seemed that i overlayed my button with something else...
so check that out first do you put something on that excact place???
other problem i had was the VAJ one --> VisualAge for Java (terrible program)
it does strange tricks even when you don't use the drawing tool...
dunno 2 thoughts i had... check it out...
SeJo -
Problems getting data from JMenuBar to JInternalFrame
I have modified an example to show my problem. I am trying to take text input from the menu bar and print it into a JTextArea. I don't know how to reference the data in my ActionListener.
The ActionListener is incomplete, but this is basically what I am trying to do:
import javax.swing.JInternalFrame;
import javax.swing.JDesktopPane;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JMenuBar;
import javax.swing.JFrame;
import javax.swing.KeyStroke;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
* InternalFrameDemo.java is a 1.4 application that requires:
* MyInternalFrame.java
public class InternalFrameDemo extends JFrame
implements ActionListener {
JDesktopPane desktop;
JTextField memAddrBox;
JTextArea menuText;
JTextArea frame;
String textFieldString = " Input Text: ";
ActionListener al;
public InternalFrameDemo() {
super("InternalFrameDemo");
//Make the big window be indented 50 pixels from each edge
//of the screen.
int inset = 50;
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
setBounds(inset, inset,
screenSize.width - inset*2,
screenSize.height - inset*2);
//Set up the GUI.
desktop = new JDesktopPane(); //a specialized layered pane
frame = createFrame(); //create first "window"
setContentPane(desktop);
setJMenuBar(createMenuBar());
//Make dragging a little faster but perhaps uglier.
desktop.setDragMode(JDesktopPane.OUTLINE_DRAG_MODE);
protected JMenuBar createMenuBar() {
JMenuBar menuBar = new JMenuBar();
JLabel memAddrLabel = new JLabel(textFieldString);
memAddrLabel.setLabelFor(memAddrBox);
menuBar.add(memAddrLabel);
JTextField memAddrBox = new JTextField();
memAddrBox.addActionListener(this);
memAddrBox.setActionCommand("chMemAddr");
menuBar.add(memAddrBox);
return menuBar;
//React to menu selections.
public void actionPerformed(ActionEvent e) {
if ("chMemAddr".equals(e.getActionCommand()))
JMenuBar bar = getJMenuBar();
// JTextField memAddrBox = bar.getParent();
String memStartString = memAddrBox.getText();
update(memStartString);
public void update(String temp)
frame.setText(temp);
//Create a new internal frame.
protected JTextArea createFrame() {
JInternalFrame frame = new JInternalFrame("Memory",true,true,true,true);
frame.setSize(650, 500);
frame.setVisible(true);
frame.setLocation(200, 0);
desktop.add(frame);
JTextArea textArea = new JTextArea();
frame.getContentPane().add("Center", textArea);
textArea.setFont(new Font("SansSerif", Font.PLAIN, 12));
textArea.setVisible(true);
textArea.setText("Initial Text");
return textArea;
//Quit the application.
protected void quit() {
System.exit(0);
public static void main(String[] args) {
//Make sure we have nice window decorations.
JFrame.setDefaultLookAndFeelDecorated(true);
//Create and set up the window.
InternalFrameDemo frame = new InternalFrameDemo();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Display the window.
frame.setVisible(true);
class MyInternalFrame extends JInternalFrame {
static int openFrameCount = 0;
static final int xOffset = 30, yOffset = 30;
public MyInternalFrame() {
super("Document #" + (++openFrameCount),
true, //resizable
true, //closable
true, //maximizable
true);//iconifiable
//...Create the GUI and put it in the window...
//...Then set the window size or call pack...
setSize(300,300);
//Set the window's location.
setLocation(xOffset*openFrameCount, yOffset*openFrameCount);
}I want to take the input from the "memAddrBox" and put it into the "frame" using the update() method. Probably a simple solution, but I have not found a similar problem in the Forums.I knew it had to be something simple, here is the fix I found:
import javax.swing.JInternalFrame;
import javax.swing.JDesktopPane;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JMenuBar;
import javax.swing.JFrame;
import javax.swing.KeyStroke;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
* InternalFrameDemo.java is a 1.4 application that requires:
* MyInternalFrame.java
public class InternalFrameDemo extends JFrame
implements ActionListener {
JDesktopPane desktop;
JTextField memAddrBox;
JTextArea menuText;
JTextArea frame;
String textFieldString = " Input Text: ";
ActionListener al;
public InternalFrameDemo() {
super("InternalFrameDemo");
//Make the big window be indented 50 pixels from each edge
//of the screen.
int inset = 50;
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
setBounds(inset, inset,
screenSize.width - inset*2,
screenSize.height - inset*2);
//Set up the GUI.
desktop = new JDesktopPane(); //a specialized layered pane
frame = createFrame(); //create first "window"
setContentPane(desktop);
setJMenuBar(createMenuBar());
//Make dragging a little faster but perhaps uglier.
desktop.setDragMode(JDesktopPane.OUTLINE_DRAG_MODE);
protected JMenuBar createMenuBar() {
JMenuBar menuBar = new JMenuBar();
JLabel memAddrLabel = new JLabel(textFieldString);
memAddrLabel.setLabelFor(memAddrBox);
menuBar.add(memAddrLabel);
JTextField memAddrBox = new JTextField();
memAddrBox.addActionListener(this);
memAddrBox.setActionCommand("chMemAddr");
menuBar.add(memAddrBox);
return menuBar;
//React to menu selections.
public void actionPerformed(ActionEvent e) {
if ("chMemAddr".equals(e.getActionCommand()))
JTextField textField =
(JTextField)e.getSource();
String memStartString = textField.getText();
update(memStartString);
public void update(String temp)
frame.setText(temp);
//Create a new internal frame.
protected JTextArea createFrame() {
JInternalFrame frame = new JInternalFrame("Memory",true,true,true,true);
frame.setSize(650, 500);
frame.setVisible(true);
frame.setLocation(200, 0);
desktop.add(frame);
JTextArea textArea = new JTextArea();
frame.getContentPane().add("Center", textArea);
textArea.setFont(new Font("SansSerif", Font.PLAIN, 12));
textArea.setVisible(true);
textArea.setText("Initial Text");
return textArea;
//Quit the application.
protected void quit() {
System.exit(0);
public static void main(String[] args) {
//Make sure we have nice window decorations.
JFrame.setDefaultLookAndFeelDecorated(true);
//Create and set up the window.
InternalFrameDemo frame = new InternalFrameDemo();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Display the window.
frame.setVisible(true);
class MyInternalFrame extends JInternalFrame {
static int openFrameCount = 0;
static final int xOffset = 30, yOffset = 30;
public MyInternalFrame() {
super("Document #" + (++openFrameCount),
true, //resizable
true, //closable
true, //maximizable
true);//iconifiable
//...Create the GUI and put it in the window...
//...Then set the window size or call pack...
setSize(300,300);
//Set the window's location.
setLocation(xOffset*openFrameCount, yOffset*openFrameCount);
}Note the e.getSource() change in the ActionListener. -
Problem in validating menu item
hi,
everybody.
i have created a main window using JInternalFrame. The window has a menu bar in which document menu is used for closing the main window, while employee menu is used for adding new frame for the employee. while the login frame is displayed when the application is executed.
my problem is that i want to validate that before login employee menu should be disabled, and after login is performed employee menu is enabled.
the following is my code. please reply me as i am stucked with it.
thanks in advance.
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.io.*;
import java.util.*;
public class InternalFrameDemo extends JFrame implements ActionListener
JDesktopPane desktop;
public InternalFrameDemo()
super("InternalFrameDemo");
int inset = 50;
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
setBounds(inset, inset, screenSize.width - inset*2, screenSize.height - inset*2);
desktop = new JDesktopPane();
setContentPane(desktop);
desktop.setBackground(Color.white);
setJMenuBar(createMenuBar());
desktop.setDragMode(JDesktopPane.OUTLINE_DRAG_MODE);
createLogin();
public JMenuBar createMenuBar()
JMenuBar menuBar = new JMenuBar();
JMenu menu = new JMenu("Document");
menu.setMnemonic(KeyEvent.VK_D);
menuBar.add(menu);
JMenuItem menuItem = new JMenuItem("Quit");
menuItem.setMnemonic(KeyEvent.VK_Q);
menuItem.setAccelerator(KeyStroke.getKeyStroke( KeyEvent.VK_Q, ActionEvent.ALT_MASK));
menuItem.setActionCommand("quit");
menuItem.addActionListener(this);
menu.add(menuItem);
JMenu employee = new JMenu("Employee");
employee.setMnemonic(KeyEvent.VK_E);
employee.setActionCommand("employee");
menuBar.add(employee);
JMenuItem additem = new JMenuItem("Add");
additem.setMnemonic(KeyEvent.VK_A);
additem.setActionCommand("add");
additem.addActionListener(this);
employee.add(additem);
return menuBar;
public void actionPerformed(ActionEvent ae)
String str = ae.getActionCommand();
if(str.equals("add"))
System.out.println("Employee Form Invoked");
createEmployee();
else if(str.equals("quit"))
quit();
public void createEmployee()
MyEmployeeFrame employeeframe = new MyEmployeeFrame();
employeeframe.setVisible(true);
desktop.add(employeeframe);
try
employeeframe.setSelected(true);
catch(Exception e)
public void createLogin()
MyLogin loginframe = new MyLogin();
loginframe.setVisible(true);
desktop.add(loginframe);
try
loginframe.setSelected(true);
catch(Exception e){}
public void quit()
System.exit(0);
private static void createAndShowGUI()
JFrame.setDefaultLookAndFeelDecorated(true);
InternalFrameDemo frame = new InternalFrameDemo();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(800,600);
frame.setVisible(true);
public static void main(String a[])
createAndShowGUI();
class MyEmployeeFrame extends JInternalFrame implements ActionListener
JFrame employeeframe;
JLabel labelfirstname;
JLabel labellastname;
JLabel labelage;
JLabel labeladdress;
JLabel labelcity;
JLabel labelstate;
JTextField textfirstname;
JTextField textlastname;
JTextField textage;
JTextField textaddress;
JTextField textcity;
JTextField textstate;
JButton buttonsave;
FileOutputStream out;
PrintStream p;
String strfirstname,strlastname,strage,straddress,strcity,strstate;
GridBagLayout gl;
GridBagConstraints gbc;
public MyEmployeeFrame()
super("Employee Details",true,true,true,true);
setSize(500,400);
labelfirstname = new JLabel("First Name");
labellastname = new JLabel("Last Name");
labelage = new JLabel("Age");
labeladdress = new JLabel("Address");
labelcity = new JLabel("City");
labelstate = new JLabel("State");
textfirstname = new JTextField(10);
textlastname = new JTextField(10);
textage = new JTextField(5);
textaddress = new JTextField(15);
textcity = new JTextField(10);
textstate = new JTextField(10);
buttonsave = new JButton("Save");
gl = new GridBagLayout();
gbc = new GridBagConstraints();
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 3;
gl.setConstraints(labelfirstname,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 3;
gbc.gridy = 3;
gl.setConstraints(textfirstname,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 5;
gl.setConstraints(labellastname,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 3;
gbc.gridy = 5;
gl.setConstraints(textlastname,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 7;
gl.setConstraints(labelage,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 3;
gbc.gridy = 7;
gl.setConstraints(textage,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 9;
gl.setConstraints(labeladdress,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 3;
gbc.gridy = 9;
gl.setConstraints(textaddress,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 11;
gl.setConstraints(labelcity,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 3;
gbc.gridy = 11;
gl.setConstraints(textcity,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 13;
gl.setConstraints(labelstate,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 3;
gbc.gridy = 13;
gl.setConstraints(textstate,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 3;
gbc.gridy = 17;
gl.setConstraints(buttonsave,gbc);
Container contentpane = getContentPane();
contentpane.setLayout(gl);
contentpane.add(labelfirstname);
contentpane.add(textfirstname);
contentpane.add(labellastname);
contentpane.add(textlastname);
contentpane.add(labelage);
contentpane.add(textage);
contentpane.add(labeladdress);
contentpane.add(textaddress);
contentpane.add(labelcity);
contentpane.add(textcity);
contentpane.add(labelstate);
contentpane.add(textstate);
contentpane.add(buttonsave);
buttonsave.addActionListener(this);
public void reset()
textfirstname.setText("");
textlastname.setText("");
textage.setText("");
textaddress.setText("");
textcity.setText("");
textstate.setText("");
public void actionPerformed(ActionEvent ae)
String str = ae.getActionCommand();
System.out.println(str);
if(str.equalsIgnoreCase("Save"))
try
out = new FileOutputStream("myfile.txt",true);
p = new PrintStream( out );
strfirstname = textfirstname.getText();
strlastname = textlastname.getText();
strage = textage.getText();
straddress = textaddress.getText();
strcity = textcity.getText();
strstate = textstate.getText();
p.print(strfirstname+"|");
p.print(strlastname+"|");
p.print(strage+"|");
p.print(straddress+"|");
p.print(strcity+"|");
p.println(strstate);
System.out.println("Record Saved");
reset();
p.close();
catch (Exception e)
System.err.println ("Error writing to file");
class MyLogin extends JInternalFrame implements ActionListener
JFrame loginframe;
JLabel labelname;
JLabel labelpassword;
JTextField textname;
JPasswordField textpassword;
JButton okbutton;
String name = "";
FileOutputStream out;
PrintStream p;
Date date;
GregorianCalendar gcal;
GridBagLayout gl;
GridBagConstraints gbc;
public MyLogin()
super("Login",true,true,true,true);
setSize(400,300);
gl = new GridBagLayout();
gbc = new GridBagConstraints();
labelname = new JLabel("User");
labelpassword = new JLabel("Password");
textname = new JTextField("",9);
textpassword = new JPasswordField(5);
okbutton = new JButton("OK");
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 5;
gl.setConstraints(labelname,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 2;
gbc.gridy = 5;
gl.setConstraints(textname,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 10;
gl.setConstraints(labelpassword,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 2;
gbc.gridy = 10;
gl.setConstraints(textpassword,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 15;
gl.setConstraints(okbutton,gbc);
Container contentpane = getContentPane();
contentpane.setLayout(gl);
contentpane.add(labelname);
contentpane.add(labelpassword);
contentpane.add(textname);
contentpane.add(textpassword);
contentpane.add(okbutton);
okbutton.addActionListener(this);
public void reset()
textname.setText("");
textpassword.setText("");
public void run()
try
String text = textname.getText();
String blank="";
if(text.equals(blank))
System.out.println("First Enter a UserName");
else
if(text != blank)
date = new Date();
gcal = new GregorianCalendar();
gcal.setTime(date);
out = new FileOutputStream("log.txt",true);
p = new PrintStream( out );
name = textname.getText();
String entry = "UserName:- " + name + " Logged in:- " + gcal.get(Calendar.HOUR) + ":" + gcal.get(Calendar.MINUTE) + " Date:- " + gcal.get(Calendar.DATE) + "/" + gcal.get(Calendar.MONTH) + "/" + gcal.get(Calendar.YEAR);
p.println(entry);
System.out.println("Record Saved");
reset();
p.close();
catch (IOException e)
System.err.println("Error writing to file");
public void actionPerformed(ActionEvent ae)
String str = ae.getActionCommand();
if(str.equals("OK"))
run();
loginframe.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
}hai!.
i am happy to help you.Below is the modified code of ur program.if u still have problem please post.
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
public class MainFrame extends JFrame implements ActionListener
JDesktopPane desktop;
JMenuBar menubar;
JMenu menu,menuemployee;
public JMenuItem menuitemlogin;
JMenuItem menuitemquit,itememployee;
public MainFrame()
super("MainFrame");
int inset = 50;
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
setBounds(inset,inset,screenSize.width - inset*2,screenSize.height - inset*2);
desktop = new JDesktopPane();
desktop.setBackground(Color.white);
setContentPane(desktop);
desktop.setDragMode(JDesktopPane.OUTLINE_DRAG_MODE);
setJMenuBar(createMenuBar());
//createLogin();
public JMenuBar createMenuBar()
menubar = new JMenuBar();
menu = new JMenu("Document");
menu.setMnemonic(KeyEvent.VK_D);
menuitemlogin = new JMenuItem("Login");
menuitemlogin.setMnemonic(KeyEvent.VK_L);
menuitemlogin.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_L, ActionEvent.ALT_MASK));
menuitemlogin.setActionCommand("login");
menuitemlogin.addActionListener(this);
menuitemquit = new JMenuItem("Quit");
menuitemquit.setMnemonic(KeyEvent.VK_Q);
menuitemquit.setAccelerator(KeyStroke.getKeyStroke( KeyEvent.VK_Q, ActionEvent.ALT_MASK));
menuitemquit.setActionCommand("quit");
menuitemquit.addActionListener(this);
menubar.add(menu);
menu.add(menuitemlogin);
menu.add(menuitemquit);
itememployee = new JMenu("Employee");
itememployee.setMnemonic(KeyEvent.VK_E);
itememployee.setActionCommand("employee");
//added this line to disable the itememployee item button
itememployee.setEnabled(false);
//use above the displaying menus all are "JAbstractButton" itememployee.disable();
menubar.add(itememployee);
JMenuItem additem = new JMenuItem("Add");
additem.setMnemonic(KeyEvent.VK_A);
additem.setActionCommand("add");
additem.addActionListener(this);
itememployee.add(additem);
return menubar;
public void actionPerformed(ActionEvent ae)
String str = ae.getActionCommand();
if(str.equals("login"))
//added this line to disable login menu:
menuitemlogin.setEnabled(false);
createLogin();
else if(str.equals("quit"))
System.exit(0);
else if(str.equals("add"))
System.out.println("Employee Form Invoked");
createEmployee();
private static void createAndShowGUI()
JFrame.setDefaultLookAndFeelDecorated(true);
MainFrame frame = new MainFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(800,600);
frame.setVisible(true);
public static void main(String a[])
createAndShowGUI();
public void createLogin()
Login loginobj = new Login();
loginobj.setVisible(true);
//itememployee.enable();
desktop.add(loginobj);
public void createEmployee()
Employee employeeobj = new Employee();
employeeobj.setVisible(true);
desktop.add(employeeobj);
class Employee extends JInternalFrame implements ActionListener
JFrame employeeframe;
JLabel labelfirstname;
JLabel labellastname;
JLabel labelage;
JLabel labeladdress;
JLabel labelcity;
JLabel labelstate;
JTextField textfirstname;
JTextField textlastname;
JTextField textage;
JTextField textaddress;
JTextField textcity;
JTextField textstate;
JButton buttonsave;
FileOutputStream out;
PrintStream p;
String strfirstname,strlastname,strage,straddress,strcity,strstate;
GridBagLayout gl;
GridBagConstraints gbc;
public Employee()
super("Employee Details",true,true,true,true);
setSize(400,300);
labelfirstname = new JLabel("First Name");
labellastname = new JLabel("Last Name");
labelage = new JLabel("Age");
labeladdress = new JLabel("Address");
labelcity = new JLabel("City");
labelstate = new JLabel("State");
textfirstname = new JTextField(10);
textlastname = new JTextField(10);
textage = new JTextField(5);
textaddress = new JTextField(15);
textcity = new JTextField(10);
textstate = new JTextField(10);
buttonsave = new JButton("Save");
gl = new GridBagLayout();
gbc = new GridBagConstraints();
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 3;
gl.setConstraints(labelfirstname,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 3;
gbc.gridy = 3;
gl.setConstraints(textfirstname,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 5;
gl.setConstraints(labellastname,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 3;
gbc.gridy = 5;
gl.setConstraints(textlastname,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 7;
gl.setConstraints(labelage,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 3;
gbc.gridy = 7;
gl.setConstraints(textage,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 9;
gl.setConstraints(labeladdress,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 3;
gbc.gridy = 9;
gl.setConstraints(textaddress,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 11;
gl.setConstraints(labelcity,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 3;
gbc.gridy = 11;
gl.setConstraints(textcity,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 13;
gl.setConstraints(labelstate,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 3;
gbc.gridy = 13;
gl.setConstraints(textstate,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 3;
gbc.gridy = 17;
gl.setConstraints(buttonsave,gbc);
Container contentpane = getContentPane();
contentpane.setLayout(gl);
contentpane.add(labelfirstname);
contentpane.add(textfirstname);
contentpane.add(labellastname);
contentpane.add(textlastname);
contentpane.add(labelage);
contentpane.add(textage);
contentpane.add(labeladdress);
contentpane.add(textaddress);
contentpane.add(labelcity);
contentpane.add(textcity);
contentpane.add(labelstate);
contentpane.add(textstate);
contentpane.add(buttonsave);
buttonsave.addActionListener(this);
public void reset()
textfirstname.setText("");
textlastname.setText("");
textage.setText("");
textaddress.setText("");
textcity.setText("");
textstate.setText("");
public void actionPerformed(ActionEvent ae)
String str = ae.getActionCommand();
System.out.println(str);
if(str.equalsIgnoreCase("Save"))
try
out = new FileOutputStream("myfile.txt",true);
p = new PrintStream( out );
strfirstname = textfirstname.getText();
strlastname = textlastname.getText();
strage = textage.getText();
straddress = textaddress.getText();
strcity = textcity.getText();
strstate = textstate.getText();
p.print(strfirstname+"|");
p.print(strlastname+"|");
p.print(strage+"|");
p.print(straddress+"|");
p.print(strcity+"|");
p.println(strstate);
System.out.println("Record Saved");
reset();
p.close();
catch (Exception e)
System.err.println ("Error writing to file");
class Login extends JInternalFrame implements ActionListener,InternalFrameListener
JFrame loginframe;
JLabel labelname;
JLabel labelpassword;
JTextField textname;
JPasswordField textpassword;
JButton okbutton;
String name = "";
FileOutputStream out;
PrintStream p;
Date date;
GregorianCalendar gcal;
GridBagLayout gl;
GridBagConstraints gbc;
MainFrame obj = new MainFrame();
public Login()
super("Login",true,true,true,true);
setSize(300,300);
gl = new GridBagLayout();
gbc = new GridBagConstraints();
labelname = new JLabel("User");
labelpassword = new JLabel("Password");
textname = new JTextField("",9);
textpassword = new JPasswordField(5);
okbutton = new JButton("OK");
okbutton.setMnemonic(KeyEvent.VK_O);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 5;
gl.setConstraints(labelname,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 2;
gbc.gridy = 5;
gl.setConstraints(textname,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 10;
gl.setConstraints(labelpassword,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 2;
gbc.gridy = 10;
gl.setConstraints(textpassword,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 15;
gl.setConstraints(okbutton,gbc);
Container contentpane = getContentPane();
contentpane.setLayout(gl);
contentpane.add(labelname);
contentpane.add(labelpassword);
contentpane.add(textname);
contentpane.add(textpassword);
contentpane.add(okbutton);
okbutton.addActionListener(this);
this.addInternalFrameListener(this);
public void reset()
textname.setText("");
textpassword.setText("");
public void run()
try
String text = textname.getText();
String blank="";
if(text.equals(blank))
System.out.println("First Enter a UserName");
JOptionPane.showMessageDialog(loginframe,"Enter UserName","Alert",JOptionPane.WARNING_MESSAGE);
else
if(text != blank)
date = new Date();
gcal = new GregorianCalendar();
gcal.setTime(date);
out = new FileOutputStream("log.txt",true);
p = new PrintStream( out );
name = textname.getText();
String entry = "UserName:- " + name + " Logged in:- " + gcal.get(Calendar.HOUR) + ":" + gcal.get(Calendar.MINUTE) + " Date:- " + gcal.get(Calendar.DATE) + "/" + gcal.get(Calendar.MONTH) + "/" + gcal.get(Calendar.YEAR);
p.println(entry);
System.out.println("Record Saved");
reset();
p.close();
System.out.println("Enabling itememployee");
obj.itememployee.enable();
//hai boy add this line to enable itememployee menu:
itememployee.setEnabled(true);
// i added this line to close/dispose the internal login frame after ok button is pressed
this.dispose();
catch (IOException e)
System.err.println("Error writing to file");
public void actionPerformed(ActionEvent ae)
String str = ae.getActionCommand();
if(str.equalsIgnoreCase("OK"))
try
run();
loginframe.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
catch(Exception e)
public void internalFrameClosing(InternalFrameEvent e){
//added this line to again enable login menu if the user closed the login window
menuitemlogin.setEnabled(true);
public void internalFrameOpened(InternalFrameEvent e) { }
public void internalFrameIconified(InternalFrameEvent e) { }
public void internalFrameDeiconified(InternalFrameEvent e) { }
public void internalFrameActivated(InternalFrameEvent e) { }
public void internalFrameDeactivated(InternalFrameEvent e) { }
public void internalFrameClosed(InternalFrameEvent e) { }
} -
Background picture n problem on display other JInternal frame
beginer;
this is my code below n i compile it n the picture display correctly, but it seems to hide other internal frame as well, what wrong with my code :(, the problem is been specified between ? symbols
public class InternalFrameDemo extends JFrame implements ActionListener {
JDesktopPane desktop;
public InternalFrameDemo() {
super("InternalFrameDemo");
int inset = 50;
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
setBounds(inset, inset,
screenSize.width - inset*2,
screenSize.height - inset*2);
Toolkit kit = Toolkit.getDefaultToolkit();
Image icon = kit.getImage("ADD.gif");
setIconImage(icon);
//Set up the GUI.
desktop = new JDesktopPane(); //a specialized layered pane
createFrame(); //create first "window"
setContentPane(desktop);
setJMenuBar(createMenuBar());
//Make dragging a little faster but perhaps uglier.
desktop.setDragMode(JDesktopPane.OUTLINE_DRAG_MODE);
ImageIcon image = new ImageIcon("abc.jpg");
JLabel background = new JLabel(image);
background.setBounds(0, 0, image.getIconWidth(), image.getIconHeight());
getLayeredPane().add(background, new Integer(Integer.MIN_VALUE) );
JPanel panel = new JPanel();
panel.setOpaque(false);
setContentPane( panel );
protected JMenuBar createMenuBar() {
JMenuBar menuBar = new JMenuBar();
//Set up the menu item
return menuBar;
public void actionPerformed(ActionEvent e) {
else {
quit();
protected void createFrame() {
Books frame = new Books();
frame.setVisible(true);
desktop.add(frame);
try {
frame.setSelected(true);
catch (java.beans.PropertyVetoException e) {}
protected void quit() {
System.exit(0);
public static void main(String[] args) {
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
catch (Exception e) {
JFrame.setDefaultLookAndFeelDecorated(true);
//Create and set up the window.
InternalFrameDemo frame = new InternalFrameDemo();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Display the window.
frame.setVisible(true);
tanz.This might be what you are trying to do:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.plaf.*;
public class TestInternalFrame extends JFrame
ImageIcon icon;
public TestInternalFrame()
icon = new ImageIcon("????.jpg");
JDesktopPane desktop = new JDesktopPane()
public void paintComponent(Graphics g)
Dimension d = getSize();
g.drawImage(icon.getImage(), 0, 0, d.width, d.height, null);
getContentPane().add( desktop );
final JInternalFrame internal =
new JInternalFrame( "Internal Frame", true, true, true, true );
desktop.add( internal );
internal.setLocation( 50, 50 );
internal.setSize( 300, 300 );
internal.setVisible( true );
public static void main(String args[])
TestInternalFrame frame = new TestInternalFrame();
frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
frame.setSize(400, 400);
frame.setVisible(true);
}
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