Changing javax.swing class

Hello,
I am an experienced programmer new to java. I found a solution to a problem I am having with BoxLayout in the bug database. The solution makes a change to the SizeRequirements class in javax.swing. I found the source for the class and have recompiled it. But the recompiled class is not being picked up. What do I do next? The classes all seem to be in a jar file although I can't find one with SizeRequirements. Is there the concept of linking in Java or do I just need to put the class in the right path location?
Thanks,
Lori

...file although I can't find one with SizeRequirements. If you can't find it then you might want to go back to the drawing board since you probably have a different java version.
I don't believe standard class files are loaded via the classpath.
This command line option is taken from the javadocs
-Xbootclasspath/p:path
Specify a semicolon-separated path of directires, JAR archives, and ZIP archives to prepend in front of the default bootstrap class path. Note: Applications that use this option for the purpose of overriding a class in rt.jar should not be deployed as doing so would contravene the Java 2 Runtime Environment binary code license.
The last sentence is important.

Similar Messages

Newbie compiler help using javax.swing class

current java ver java version "1.5.0_02"
error msg
[error]
C:\Documents and Settings\Neil\Desktop\Java>javac neiltest2.java
neiltest2.java:12: package javax does not exist
import javax.swing;
^
neiltest2.java:28: cannot resolve symbol
symbol : variable JOptionPane
location: class neiltest2
JOptionPane.showMessageDialog(null, "The total is " + intSum);
^
2 errors
[error]
* neiltest2.java
* Created on 02 June 2005, 19:02
* @author Neil
* @version
import javax.swing;
public class neiltest2 {
    /** Creates new neiltest2 */
    public neiltest2() {
    * @param args the command line arguments
    public static void main (String args[]) {
        int intSum;
        intSum = 14+35;
        JOptionPane.showMessageDialog(null, "The total is " + intSum);
        System.exit(0);
}TIA
Neil

Use either
import javax.swing.JOptionPanel;
or
import javax.swing.*;
� {�

Variable textArea not found in class javax.swing.JFrame...

Making progress on this issue -- but still stuck. Again trying to get the text from a JTextArea on exit:
        frame.addWindowListener
       (new WindowAdapter() {
         public void windowClosing(WindowEvent e)
            System.out.println("Why me???" + frame.textArea.getText());
        });User MARSIAN helped me understand the scope fo the variables and now that has been fixed. Unfortunately I cannot access my variable textArea in the above code. If get this error:
Error: variable textArea not found in class javax.swing.JFrame
What am I doing wrong?
import java.net.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import FragImpl.*;
public class Framework extends WindowAdapter {
    public int numWindows = 0;
    private Point lastLocation = null;
    private int maxX = 500;
    private int maxY = 500;
    JFrame frame;
    public Framework() {
        newFrag();
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        maxX = screenSize.width - 50;
        maxY = screenSize.height - 50;
        makeNewWindow();
    public void makeNewWindow() {
        frame = new MyFrame(this); //*
        numWindows++;
        System.out.println("Number of windows: " + numWindows);
        if (lastLocation != null) {
            //Move the window over and down 40 pixels.
            lastLocation.translate(40, 40);
            if ((lastLocation.x > maxX) || (lastLocation.y > maxY)) {
                lastLocation.setLocation(0, 0);
            frame.setLocation(lastLocation);
        } else {
            lastLocation = frame.getLocation();
        System.out.println("Frame location: " + lastLocation);
        frame.setVisible(true);
        frame.addWindowListener
       (new WindowAdapter() {
         public void windowClosing(WindowEvent e)
            System.out.println("Why me???" + frame.textArea.getText());
    //This method must be evoked from the event-dispatching thread.
    public void quit(JFrame frame) {
        if (quitConfirmed(frame)) {
            System.exit(0);
        System.out.println("Quit operation not confirmed; staying alive.");
    private boolean quitConfirmed(JFrame frame) {
        String s1 = "Quit";
        String s2 = "Cancel";
        Object[] options = {s1, s2};
        int n = JOptionPane.showOptionDialog(frame,
                "Windows are still open.\nDo you really want to quit?",
                "Quit Confirmation",
                JOptionPane.YES_NO_OPTION,
                JOptionPane.QUESTION_MESSAGE,
                null,
                options,
                s1);
        if (n == JOptionPane.YES_OPTION) {
            return true;
        } else {
            return false;
     private void newFrag()
          Frag frag = new FragImpl();
    public static void main(String[] args) {
        Framework framework = new Framework();
class MyFrame extends JFrame {
    protected Dimension defaultSize = new Dimension(200, 200);
    protected Framework framework = null;
    private Color color = Color.yellow;
    private Container c;
    JTextArea textArea;
    public MyFrame(Framework controller) {
        super("New Frame");
        framework = controller;
        setDefaultCloseOperation(DISPOSE_ON_CLOSE);
        setSize(defaultSize);
        //Create a text area.
        textArea = new JTextArea(
                "This is an editable JTextArea " +
                "that has been initialized with the setText method. " +
                "A text area is a \"plain\" text component, " +
                "which means that although it can display text " +
                "in any font, all of the text is in the same font."
        textArea.setFont(new Font("Serif", Font.ITALIC, 16));
        textArea.setLineWrap(true);
        textArea.setWrapStyleWord(true);
        textArea.setBackground ( Color.yellow );
        JScrollPane areaScrollPane = new JScrollPane(textArea);
        //Create the status area.
        JPanel statusPane = new JPanel(new GridLayout(1, 1));
        ImageIcon icoOpen = null;
        URL url = null;
        try
            icoOpen = new ImageIcon("post_it0a.gif"); //("doc04d.gif");
        catch(Exception ex)
            ex.printStackTrace();
            System.exit(1);
        setIconImage(icoOpen.getImage());
        c = getContentPane();
        c.setBackground ( Color.yellow );
        c.add ( areaScrollPane, BorderLayout.CENTER ) ;
        c.add ( statusPane, BorderLayout.SOUTH );
        c.repaint ();
}

Yeah!!! It works. Turned out to be a combination of DrKlap's and Martisan's suggestions -- had to change var frame's declaration from JFrame to MyFrame:
    MyFrame frame;Next, created the external class -- but again changed JFrame references to MyFrame:
public class ShowOnExit extends WindowAdapter {
//   JFrame aFrame;
   MyFrame aFrame;
   public ShowOnExit(MyFrame f) {
      aFrame = f;
   public void windowClosing(WindowEvent e)
      System.out.println("Why me???" + aFrame.textArea.getText()); // aFrame here not frame !!!
}This worked. So looks like even though the original code added a WindowListener to 'frame', the listener didn't couldn't access frame's methods unless it was explicitly passed in as a parameter. Let me know if that's wrong.
Thanks again, all.

Javax.swing.JFileChooser -- open button change current directory... Why?

Hello community.
I use javax.swing.JFileChooser class. After press open button, JFileChooser change current directory. Why?
I was not find in documentation about changing curret directiry by JFileChooser. Take me please reference to doc for understanding this effect.
Thank you.

This is my code:
private void jFileChooser1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
// label1.setText("3: "+evt.);
// label1.setText("3: ");
label1.setText(evt.getActionCommand());
System.out.println(evt.getActionCommand());
if (evt.getActionCommand().startsWith("Approve")){
label1.setText("You push Open key");
System.out.println(jFileChooser1.getCurrentDirectory().getPath());
label1.setText(jFileChooser1.getCurrentDirectory().getPath());
}else{
label1.setText("You push Close key");
I not add method for change current directory. But after press on open button javax.swing.JFileChooser class was change current directory.

Cannot find class javax.swing.JOptionPane

Hello,
I imported the class
import javax.swing.JOptionPane;and written as a first line of my code in the form of a .java file.
but error occurs as : cannot find the class javax.swing.JOptionPane. What should I do.
Thank you.

Are you doing something likeimport javax.swing.JOptionPane;
class Test {
    public static void main(String args[]) {
        JOptionPane.showMessageDialog(null, "Testing",
                "Testing", JOptionPane.INFORMATION_MESSAGE);
}Mark

Missing classes from the javax.swing package?

Can anyone throw any light on what appears to be a missing class from the javax.swing package?
When CelsiusConverter.java from The Swing Tutorial (code fragment shown below) is compiled the JFrame class can't be found.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class CelsiusConverter implements ActionListener {
JFrame converterFrame;Despite the package javax.swing being imported, the compiler does not seem to be be able to find the JFrame class.
CelsiusConverter.java:14: Class JFrame not found in type declaration.
JFrame converterFrame;To attempt to solve this issue all the files in jdk1.5.0_02\lib were added to CLASSPATH.
CLASSPATH was set to C:\Program Files\Java\jdk1.5.0_02\lib\dt.jar;C:\Program Files\Java\jdk1.5.0_02\lib\htmlconverter.jar;C:\Program Files\Java\jdk1.5.0_02\lib\jconsole.jar;C:\Program Files\Java\jdk1.5.0_02\lib\tools.jar;C:\Program Files\Java\jdk1.5.0_02\lib;C:\Program Files\Java\jdk1.5.0_02\lib\ir.idl;C:\Program Files\Java\jdk1.5.0_02\lib\jawt.lib;C:\Program Files\Java\jdk1.5.0_02\lib\jvm.lib;C:\Program Files\Java\jdk1.5.0_02\lib\orb.idl;C:\Program Files\Java\jdk1.5.0_02\demo\jfc\SwingApplet\SwingApplet.jar;.;c:\CoreJavaBook

This is extremely strange... If you're sure it's not a problem in your code or with your classpath, the only other thing I can think to suggest is re-downloading / installing java

Jdeveloper - Could not initialize class javax.swing.KeyStroke

I am trying to install jdeveloper on a new machine, I have installed latest JDK from sun and downloaded the jdevstudiobase101033.zip file, however once I have followed the instructions to install on linux (Fedora core 11 - 64bit) and try to fire jdev up using jdev/bin/jdev I get the following error message:
Oracle JDeveloper 10g 10.1.3.3
Copyright 1997, 2007 Oracle. All Rights Reserved
java.lang.NoClassDefFoundError: Could not initialize class javax.swing.KeyStroke
     at java.lang.Class.forName0(Native Method)
     at java.lang.Class.forName(Class.java:169)
     at oracle.ide.IdeCore.class$(IdeCore.java:98)
     at oracle.ide.IdeCore.startupImpl(IdeCore.java:816)
     at oracle.ide.Ide.startup(Ide.java:674)
     at oracle.ideimpl.Main.start(Main.java:49)
     at oracle.ideimpl.Main.main(Main.java:25)
I have trawled through google and forums at oracle with no joy, could someone kindly give me some pointers as to what I have missed or what may be wrong ?
Thanks
Ian

It is running the 32 bit JDK, the 64 bit threw up errors even earlier in the startup porcedure.
Ian

Where is javax.swing.GroupLayout Class....?

In the Java 6 Doc I am getting the information about javax.swing.GroupLayout class. But I cpuld not find the class in Jar.
Am I missing something?
It will be appriciated If you help me to finding the Jar file for this class.
Thanks.

Thanks for help.
I have got it. As I am using beta version of Java6 in which that class was missing. In the latest version of JDK , I have found that class.

Why can i not get the class javax/swing/UImanager from installanywhere??

I use Installanywhere to pack my program,but when i double-click the short-cut,it says no class found :javax/swing/UImanage.
anybody can tell what happened?
thanks.

who can help me ? none want to help me.

Class not found javax.swing.JLabel

Hello,
I'm using JDK 1.3.0 and now I tried the first time to include Swing components into my Applet. When I compile the coding there are no errors and even when I use a standard coding example I always get the "class not found error message" for the swing component. When I don't use swing components I don't get any error message and the applet is loaded properly.
Do I have to trigger the applet in the html coding in a different way or can anybody give me a hint on that?
Jens

I also imported the swing classes, but the error pops up either...

Javax.swing.JPanel Help

my application is sort of a game, i planned on having a JPanel subclass called EventPanel have an instance variable _curPanel.
curPanel is of type JPanel. In the constructor I can set curPanel to Other JPanel subclasses. I have another subclass of JPanel called MainScreen, which has the main screen for the game.
I can set curPanel = new MainScreen(); in the constructor for eventPanel. And it works.
But if I try to change _curPanel after i've made it, it wont show up. I have a method which signature
void setPanel(javax.swing.JPanel panel)
    _curPanel = panel;
    repaint();
}to change the EventPanel, but nothing changes.
In the MainScreen class there is a method call
_eventPanel.setPanel(new NewPlayerPanel());and nothing changes in the code. I have a JTextArea logging info, and in the constructor for NewPlayerPanel at the end it prints a message in my JTextArea. The Panel is being created but not showing up.
I have also tried creating the panel in an instance variable, setting it to setVisbile(true) and trying again and it doesnt work.

In other words...
char c=evt.getKeyChar();c is some character based on this event.
if(c=='1'){Ok, let's say it is '1'...
...> char c2=evt.getKeyChar();Then c2 is also '1'.evt.getKeyChar() isn't going to magically change to be something different than it returned when you called it a few lines up before, so...>if(c2=='a')...this can never be true, given the above.

Import javax.swing.* error

Heya. I decided to learn java and i've been doing the tutorials, recently i started the swing tutorials and the learn by example page. However, whenever I try to import javax.swing.* it gives me an error. SO you know, i am using the J2SDK 1.4.2 and netbeans IDE 5.0. Here's the error text and what i type.
import javax.swing.* ;
the error is:
illegal start of expression and then sometimes i get <identifier> expected.
can anyone help me?

To update. I figured out how to do this with a blank start file in netbeans, however it's awful to have to delete main and then make a new class file. So, is there anyway to get a blank template project or to import javax.swing.* without having to delete main and start with a blank file? SO, i guess my question has changed, but it's still about an import javax.swing.* error.
thanks.

[HELP! ] why my program thows a javax.swing.text.ChangedCharSetException?

there's the source:
import java.io.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.text.html.*;
import javax.swing.border.*;
class HTMLMagician extends JFrame
     protected static final String APP_NAME="HTML Magician V1.0 Produced By V Studio";
     protected JTextPane hm_textPane;
     protected StyleSheet hm_styleSheet;
     protected HTMLEditorKit html_kit;
     protected HTMLDocument html_document;
     protected JMenuBar hm_menuBar;
     protected JToolBar hm_toolBar;
     protected JFileChooser hm_fileChooser;
     protected File current_file;
     protected boolean text_changed=false;
     public HTMLMagician()
          super(APP_NAME);
          setSize(800,600);
          getContentPane().setLayout(new BorderLayout());
          produceMenuBar();
          hm_textPane=new JTextPane();
          html_kit=new HTMLEditorKit();
          hm_textPane.setEditorKit(html_kit);
          JScrollPane textPane_scrollPane=new JScrollPane();
          textPane_scrollPane.getViewport().add(hm_textPane);
          getContentPane().add(textPane_scrollPane,BorderLayout.CENTER);
          hm_fileChooser=new JFileChooser();
          javax.swing.filechooser.FileFilter hm_filter=new javax.swing.filechooser.FileFilter()
               public boolean accept(File pathname)
                    if(pathname.isDirectory())
                         return true;
                    String ext_name=pathname.getName().toLowerCase();
                    if(ext_name.endsWith(".htm"))
                         return true;
                    if(ext_name.endsWith(".html"))
                         return true;
                    if(ext_name.endsWith(".asp"))
                         return true;
                    if(ext_name.endsWith(".jsp"))
                         return true;
                    if(ext_name.endsWith(".css"))
                         return true;
                    if(ext_name.endsWith(".php"))
                         return true;
                    if(ext_name.endsWith(".aspx"))
                         return true;
                    if(ext_name.endsWith(".xml"))
                         return true;
                    if(ext_name.endsWith(".txt"))
                         return true;
                    return false;
               public String getDescription()
                    return "HTML files(*.htm,*.html,*.asp,*.jsp,*.css,*.php,*.aspx,*.xml)";
          hm_fileChooser.setAcceptAllFileFilterUsed(false);
          hm_fileChooser.setFileFilter(hm_filter);
          try
               File dir=(new File(".")).getCanonicalFile();
               hm_fileChooser.setCurrentDirectory(dir);
          }catch(IOException ex)
               showError(ex,"Error openning current directory");
          newDocument();
          WindowListener action_winClose=new WindowAdapter()
               public void windowClosing(WindowEvent evt)
                    if(!promptToSave())
                         return;
                    System.exit(0);
          addWindowListener(action_winClose);
          setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
          setVisible(true);
     protected void produceMenuBar()
          hm_menuBar=new JMenuBar();
          hm_toolBar=new JToolBar();
          JMenu menu_file=new JMenu("File");
          menu_file.setMnemonic('f');
          ImageIcon icon_new=new ImageIcon("imgs/file.gif");
          Action action_new=new AbstractAction("New",icon_new)
               public void actionPerformed(ActionEvent evt)
                    if(!promptToSave())
                         return;
                    newDocument();
          JMenuItem item_new=new JMenuItem(action_new);
          item_new.setMnemonic('n');
          item_new.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N,InputEvent.CTRL_MASK));
          menu_file.add(item_new);
          JButton button_new=hm_toolBar.add(action_new);
          ImageIcon icon_open=new ImageIcon("imgs/folder_open.gif");
          Action action_open=new AbstractAction("Open...",icon_open)
               public void actionPerformed(ActionEvent evt)
                    if(!promptToSave())
                         return;
                    openDocument();
          JMenuItem item_open=new JMenuItem(action_open);
          item_open.setMnemonic('o');
          item_open.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,InputEvent.CTRL_MASK));
          menu_file.add(item_open);
          JButton button_open=hm_toolBar.add(action_open);
          ImageIcon icon_save=new ImageIcon("imgs/floppy.gif");
          Action action_save=new AbstractAction("Save",icon_save)
               public void actionPerformed(ActionEvent evt)
                    saveAs(false);
          JMenuItem item_save=new JMenuItem(action_save);
          item_save.setMnemonic('s');
          item_save.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,InputEvent.CTRL_MASK));
          menu_file.add(item_save);
          JButton button_save=hm_toolBar.add(action_save);
          Action action_saveAs=new AbstractAction("Save As...")
               public void actionPerformed(ActionEvent evt)
                    saveAs(true);
          JMenuItem item_saveAs=new JMenuItem(action_saveAs);
          item_saveAs.setMnemonic('a');
          item_saveAs.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A,InputEvent.CTRL_MASK));
          menu_file.add(item_saveAs);
          menu_file.addSeparator();
          Action action_close=new AbstractAction("Quit")
               public void actionPerformed(ActionEvent evt)
                    if(!promptToSave())
                         return;
                    System.exit(0);
          JMenuItem item_exit=new JMenuItem(action_close);
          item_exit.setMnemonic('q');
          item_exit.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Q,InputEvent.CTRL_MASK));
          menu_file.add(item_exit);
          hm_menuBar.add(menu_file);
          setJMenuBar(hm_menuBar);
          getContentPane().add(hm_toolBar,BorderLayout.NORTH);
     protected String getDocumentName()
          return current_file==null ? "Untitled" : current_file.getName();
     protected void newDocument()
          html_document=(HTMLDocument)html_kit.createDefaultDocument();
          hm_styleSheet=html_document.getStyleSheet();
          hm_textPane.setDocument(html_document);
          current_file=null;
          setTitle(getDocumentName()+" - "+APP_NAME);
          Runnable runner=new Runnable()
               public void run()
                    text_changed=false;
                    html_document.addDocumentListener(new action_textChanged());
          SwingUtilities.invokeLater(runner);
     protected void openDocument()
          if(hm_fileChooser.showOpenDialog(HTMLMagician.this)!=JFileChooser.APPROVE_OPTION)
               return;
          File f=hm_fileChooser.getSelectedFile();
          if(f==null || !f.isFile())
               return;
          current_file=f;
          setTitle(getDocumentName()+" - "+APP_NAME);
          HTMLMagician.this.setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
          try
               InputStream in=new FileInputStream(current_file);
               html_document=(HTMLDocument)html_kit.createDefaultDocument();
               html_kit.read(in,html_document,0);
               hm_styleSheet=html_document.getStyleSheet();
               hm_textPane.setDocument(html_document);
               in.close();
          }catch(Exception ex)
               showError(ex,"Error openning file "+current_file);
          HTMLMagician.this.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
          Runnable runner=new Runnable()
               public void run()
                    text_changed=false;
                    html_document.addDocumentListener(new action_textChanged());
          SwingUtilities.invokeLater(runner);
     protected boolean saveAs(boolean as)
          if(!as && !text_changed)
               return true;
          if(as || current_file==null)
               if(hm_fileChooser.showSaveDialog(HTMLMagician.this)!=JFileChooser.APPROVE_OPTION)
                    return false;
               File f=hm_fileChooser.getSelectedFile();
               if(f==null || !f.isFile())
                    return false;
               current_file=f;
               setTitle(getDocumentName()+" - "+APP_NAME);
          HTMLMagician.this.setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
          try
               OutputStream out=new FileOutputStream(current_file);
               html_kit.write(out,html_document,0,html_document.getLength());
               out.close();
          }catch(Exception ex)
               showError(ex,"Error saving file "+current_file);
          HTMLMagician.this.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
          return true;
     protected boolean promptToSave()
          if(!text_changed)
               return true;
          int result=JOptionPane.showConfirmDialog(this,"Save change to "+getDocumentName(),APP_NAME,JOptionPane.YES_NO_CANCEL_OPTION,JOptionPane.INFORMATION_MESSAGE);
          switch(result)
               case JOptionPane.YES_OPTION:
                    if(!saveAs(false))
                         return false;
                    return true;
               case JOptionPane.NO_OPTION:
                    return true;
               case JOptionPane.CANCEL_OPTION:
                    return false;
          return true;
     protected void showError(Exception ex,String message)
          ex.printStackTrace();
          JOptionPane.showMessageDialog(this,message,APP_NAME,JOptionPane.WARNING_MESSAGE);
     public static void main(String[] args)
          new HTMLMagician();
     class action_textChanged implements DocumentListener
          public void changedUpdate(DocumentEvent evt)
               text_changed=true;
          public void insertUpdate(DocumentEvent evt)
               text_changed=true;
          public void removeUpdate(DocumentEvent evt)
               text_changed=true;
when i open a .html file,the command output :
javax.swing.text.ChangedCharSetException
     at javax.swing.text.html.parser.DocumentParser.handleEmptyTag(Unknown Source)
     at javax.swing.text.html.parser.Parser.startTag(Unknown Source)
     at javax.swing.text.html.parser.Parser.parseTag(Unknown Source)
     at javax.swing.text.html.parser.Parser.parseContent(Unknown Source)
     at javax.swing.text.html.parser.Parser.parse(Unknown Source)
     at javax.swing.text.html.parser.DocumentParser.parse(Unknown Source)
     at javax.swing.text.html.parser.ParserDelegator.parse(Unknown Source)
     at javax.swing.text.html.HTMLEditorKit.read(Unknown Source)
     at javax.swing.text.DefaultEditorKit.read(Unknown Source)
     at HTMLMagician.openDocument(HTMLMagician.java:222)
     at HTMLMagician$4.actionPerformed(HTMLMagician.java:128)
     at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
     at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
     at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
     at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
     at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
     at java.awt.Component.processMouseEvent(Unknown Source)
     at javax.swing.JComponent.processMouseEvent(Unknown Source)
     at java.awt.Component.processEvent(Unknown Source)
     at java.awt.Container.processEvent(Unknown Source)
     at java.awt.Component.dispatchEventImpl(Unknown Source)
     at java.awt.Container.dispatchEventImpl(Unknown Source)
     at java.awt.Component.dispatchEvent(Unknown Source)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
     at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
     at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
     at java.awt.Container.dispatchEventImpl(Unknown Source)
     at java.awt.Window.dispatchEventImpl(Unknown Source)
     at java.awt.Component.dispatchEvent(Unknown Source)
     at java.awt.EventQueue.dispatchEvent(Unknown Source)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.run(Unknown Source)
why? what's wrong? thanks

The DocumentParser seems to throw a ChangedCharSetException if it finds a "http-equiv" meta tag for "content-type" or "charset" and if the parser's "ignoreCharSet" property is set to false on creation.

Fix for PENDING in javax.swing.text.html.ParagraphView line #131

Investigating source of HTMLEditorKit I found many PENDING things. That's fix for one of them - proper minimal necessary span detecting in table cells.
Hope it will help to somebody else.
import javax.swing.*;
import javax.swing.text.html.*;
import javax.swing.text.html.ParagraphView;
import javax.swing.text.*;
import java.awt.*;
import java.text.*;
import java.util.ArrayList;
public class App extends JFrame {
 public static String htmlString="<html>\n" +
 "<body>\n" +
 "The following table is used to illustrate the PENDING in javax.swing.text.html.ParagraphView line #131 fix.\n" +
 "<table cellspacing=\"0\" border=\"1\" width=\"50%\" cellpadding=\"3\">\n" +
 "<tr>\n" +
 "<td>\n" +
 "111111111111111111111111111111111bold22222222222222222222222222222\n" +
 "</td>\n" +
 "<td>\n" +
 "-\n" +
 "</td>\n" +
 "</tr>\n" +
 "</table>\n" +
 "\n" +
 "</body>\n" +
 "</html>";
 JEditorPane editor=new JEditorPane();
 JEditorPane editor2=new JEditorPane();
 public static void main(String[] args) {
 App app = new App();
 app.setVisible(true);
 public App() {
 super("HTML span fix example");
 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 JSplitPane split=new JSplitPane(JSplitPane.VERTICAL_SPLIT, createFixedPanel(), createOriginalPanel());
 getContentPane().add(split);
 setSize(700, 500);
 split.setDividerLocation(240);
 setLocationRelativeTo(null);
 JComponent createOriginalPanel() {
 JPanel p=new JPanel(new BorderLayout());
 p.add(new JLabel("Original HTMLEditorKit"), BorderLayout.NORTH);
 HTMLEditorKit kit=new HTMLEditorKit();
 editor2.setEditorKit(kit);
 editor2.setContentType("text/html");
 editor2.setText(htmlString);
 p.add(new JScrollPane(editor2), BorderLayout.CENTER);
 return p;
 JComponent createFixedPanel() {
 JPanel p=new JPanel(new BorderLayout());
 p.add(new JLabel("Fixed HTMLEditorKit"), BorderLayout.NORTH);
 HTMLEditorKit kit=new MyHTMLEditorKit();
 editor.setEditorKit(kit);
 editor.setContentType("text/html");
 editor.setText(htmlString);
 p.add(new JScrollPane(editor), BorderLayout.CENTER);
 return p;
class MyHTMLEditorKit extends HTMLEditorKit {
 ViewFactory defaultFactory=new MyHTMLFactory();
 public ViewFactory getViewFactory() {
 return defaultFactory;
class MyHTMLFactory extends HTMLEditorKit.HTMLFactory {
 public View create(Element elem) {
 View v=super.create(elem);
 if (v instanceof ParagraphView) {
 v=new MyParagraphView(elem);
 return v;
class MyParagraphView extends ParagraphView {
 public MyParagraphView(Element elem) {
 super(elem);
 protected SizeRequirements calculateMinorAxisRequirements(int axis, SizeRequirements r) {
 r = super.calculateMinorAxisRequirements(axis, r);
 float min=getLongestWordSpan();
 r.minimum = Math.max(r.minimum, (int) min);
 return r;
 public float getLongestWordSpan() {
 if (getContainer()!=null && getContainer() instanceof JTextComponent) {
 try {
 int offs=0;
 JTextComponent c=(JTextComponent)getContainer();
 Document doc=getDocument();
 int start=getStartOffset();
 int end=getEndOffset()-1; //don't need the last \n
 String text=doc.getText(start, end - start);
 if(text.length() > 1) {
 BreakIterator words = BreakIterator.getWordInstance(c.getLocale());
 words.setText(text);
 ArrayList<Integer> wordBounds=new ArrayList<Integer>();
 wordBounds.add(offs);
 int count=1;
 while (offs<text.length() && words.isBoundary(offs)) {
 offs=words.next(count);
 wordBounds.add(offs);
 float max=0;
 for (int i=1; i<wordBounds.size(); i++) {
 int wStart=wordBounds.get(i-1)+start;
 int wEnd=wordBounds.get(i)+start;
 float span=getLayoutSpan(wStart,wEnd);
 if (span>max) {
 max=span;
 return max;
 } catch (BadLocationException e) {
 e.printStackTrace();
 return 0;
 public float getLayoutSpan(int startOffset, int endOffset) {
 float res=0;
 try {
 Rectangle r=new Rectangle(Short.MAX_VALUE, Short.MAX_VALUE);
 int startIndex= layoutPool.getViewIndex(startOffset,Position.Bias.Forward);
 int endIndex= layoutPool.getViewIndex(endOffset,Position.Bias.Forward);
 View startView=layoutPool.getView(startIndex);
 View endView=layoutPool.getView(endIndex);
 int x1=startView.modelToView(startOffset,r,Position.Bias.Forward).getBounds().x;
 int x2=endView.modelToView(endOffset,r,Position.Bias.Forward).getBounds().x;
 res=startView.getPreferredSpan(View.X_AXIS)-x1;
 for (int i=startIndex+1; i<endIndex; i++) {
 res+=layoutPool.getView(i).getPreferredSpan(View.X_AXIS);
 res+=x2;
 } catch (BadLocationException e) {
 e.printStackTrace();
 return res;
}Regards,
Stas

I'm changing the foreground color with
MutableAttributeSet attr = new SimpleAttributeSet();
StyleConstants.setForeground(attr, newColor);
int start=MyJTextPane..getSelectionStart();
int end=MyJTextPane.getSelectionEnd();
if (start != end) {
htmlDoc.setCharacterAttributes(start, end, attr, false);
else {
MutableAttributeSet inputAttributes =htmlEditorKit.getInputAttributes();
inputAttributes.addAttributes(attr);

JTextfield listening for changes from other class

Hi,
Assuming I have a Jtextfield in one of the class1 extend Jframe,
how do I update the jtextfield so that it could up make accessible by other class and continuously updated to reflect the input for value rom another class2.
In other words very much similar to the observable model view concept
class 1 may be look like
private void initComponents() {
jTextField1 = new javax.swing.JTextField();
jButton1 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jTextField1.setEditable(false);
class 2 may be look similar to the following
public void out_1(){
setStop1("N");
for (int i=1;i<100;i++){
class_1.getJTextField1().setText(String.valueOf(i)); // System.out.println(i);
setOuti(i);
setStop1("N");

HI,
I have attempted with the following coding , test 1 the source display generated using Netbeans GUI , t est2 the worker code ,and mybean the bean , so far nothing seems to work .
I have not try the threaded swing concept as I am not familar with the concurrency but i am not sure whether propertylistener will do the job or not
In summary , list of method employed are :
binding the jtextfield1 to a bean,
jtextfield add document listener ,
Coding objective
1. Test 1 defined jtexfield1 and jbutton
2 Jbutton added actionlistener , where upon click,
Execute Test 2 which will assign a series of integer to the bean , own setters & getters, Output is achieved via Test 1 jtextfield1 supposingly to display all the running number from 1 to 99 continuously until the test2 out_1 method finished the execution
Anyone could provide the assistance .
Thank
* Test_1.java
* Created on July 25, 2007, 9:23 PM
package sapcopa;
import java.beans.PropertyChangeListener;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.text.Document;
import sapcopa.MyBean.*;
public class Test_1 extends javax.swing.JFrame {
/** Creates new form Test_1 */
// private Test_2 t2=new Test_2();
private String input_txt;
public Test_1() {
myBean1=new MyBean();
myBean1.addPropertyChangeListener(new java.beans.PropertyChangeListener(){
public void propertyChange(java.beans.PropertyChangeEvent evt) {
bean_chg(evt);
initComponents();
/** 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() {
myBean1 = new sapcopa.MyBean();
jTextField1 = new javax.swing.JTextField();
jTextField1.getDocument().addDocumentListener(new MyDocumentListener());
jButton1 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jTextField1.setEditable(false);
jTextField1.setText(myBean1.getRecord_Process());
jTextField1.addPropertyChangeListener(new java.beans.PropertyChangeListener() {
public void propertyChange(java.beans.PropertyChangeEvent evt) {
txt1_chg(evt);
jButton1.setText("jButton1");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
But1(evt);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(19, 19, 19)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 250, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(layout.createSequentialGroup()
.addGap(32, 32, 32)
.addComponent(jButton1)))
.addContainerGap(131, Short.MAX_VALUE))
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 29, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(21, 21, 21)
.addComponent(jButton1)
.addContainerGap(216, Short.MAX_VALUE))
pack();
}// </editor-fold>//GEN-END:initComponents
private void txt1_chg(java.beans.PropertyChangeEvent evt) {//GEN-FIRST:event_txt1_chg
// TODO add your handling code here:
//myBean1=new MyBean();
try {
jTextField1.setText(myBean1.getRecord_Process());
} catch (Exception e){
e.printStackTrace();
}//GEN-LAST:event_txt1_chg
private void bean_chg(java.beans.PropertyChangeEvent evt){
jTextField1.setText(myBean1.getRecord_Process());
private void But1(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_But1
//getJTextField1().getDocument().addDocumentListener(new MyDocumentListener());
Test_2 t2=new Test_2();
t2.out_1();
try{
System.out.println("Button 1 mybean->"+myBean1.getRecord_Process());
} catch (Exception e){
e.printStackTrace();
// TODO add your handling code here:
}//GEN-LAST:event_But1
* @param args the command line arguments
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Test_1().setVisible(true);
public javax.swing.JTextField getJTextField1() {
return jTextField1;
public void setJTextField1(javax.swing.JTextField jTextField1) {
this.jTextField1 = jTextField1;
class MyDocumentListener implements DocumentListener {
final String newline = "\n";
public void insertUpdate(DocumentEvent e) {
// updateLog(e, "inserted into");
String vstr=myBean1.getRecord_Process().toString();
jTextField1.setText(vstr);
public void removeUpdate(DocumentEvent e) {
//updateLog(e, "removed from");
String vstr=myBean1.getRecord_Process().toString();
jTextField1.setText(vstr);
public void changedUpdate(DocumentEvent e) {
//Plain text components don't fire these events.
String vstr=myBean1.getRecord_Process().toString();
jTextField1.setText(vstr);
public void updateLog(DocumentEvent e, String action) {
Document doc = (Document)e.getDocument();
int changeLength = e.getLength();
// jTextField1.setText(String.valueOf(changeLength));
String vstr=myBean1.getRecord_Process().toString();
jTextField1.setText(vstr);
public String getInput_txt() {
return input_txt;
public void setInput_txt(String input_txt) {
this.input_txt = input_txt;
// Variables declaration - do not modify//GEN-BEGIN:variables
private javax.swing.JButton jButton1;
private javax.swing.JTextField jTextField1;
private sapcopa.MyBean myBean1;
// End of variables declaration//GEN-END:variables
* Test_2.java
* Created on July 25, 2007, 9:26 PM
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
package sapcopa;
import sapcopa.MyBean.*;
public class Test_2 {
private Test_1 t1=new Test_1();
private int outi;
private String stop1;
MyBean mybean;
/** Creates a new instance of Test_2 */
public Test_2() {
public void out_1(){
setStop1("N");
mybean=new MyBean();
for (int i=1;i<100;i++){
mybean.setRecord_Process(String.valueOf(i));
setOuti(i);
setStop1("N");
setStop1("Y");
public int getOuti() {
return outi;
public void setOuti(int outi) {
this.outi = outi;
public String getStop1() {
return stop1;
public void setStop1(String stop1) {
this.stop1 = stop1;
* MyBean.java
* Created on July 24, 2007, 12:00 AM
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
package sapcopa;
import javax.swing.JTextField;
public class MyBean {
/** Creates a new instance of MyBean */
public MyBean() {
* Holds value of property record_Process.
private JTextField txt_rec_process;
private String record_Process;
* Utility field used by bound properties.
private java.beans.PropertyChangeSupport propertyChangeSupport = new java.beans.PropertyChangeSupport(this);
* Adds a PropertyChangeListener to the listener list.
* @param l The listener to add.
public void addPropertyChangeListener(java.beans.PropertyChangeListener l) {
propertyChangeSupport.addPropertyChangeListener(l);
* Removes a PropertyChangeListener from the listener list.
* @param l The listener to remove.
public void removePropertyChangeListener(java.beans.PropertyChangeListener l) {
propertyChangeSupport.removePropertyChangeListener(l);
* Getter for property record_Process.
* @return Value of property record_Process.
public String getRecord_Process() {
return this.record_Process;
* Setter for property record_Process.
* @param record_Process New value of property record_Process.
public void setRecord_Process(String record_Process) {
String oldRecord_Process = this.record_Process;
this.record_Process = record_Process;
propertyChangeSupport.firePropertyChange("record_Process", oldRecord_Process, record_Process);
* Holds value of property rec_Match.
private String rec_Match;
* Getter for property rec_Match.
* @return Value of property rec_Match.
public String getRec_Match() {
return this.rec_Match;
* Setter for property rec_Match.
* @param rec_Match New value of property rec_Match.
public void setRec_Match(String rec_Match) {
String oldRec_Match = this.rec_Match;
this.rec_Match = rec_Match;
propertyChangeSupport.firePropertyChange("rec_Match", oldRec_Match, rec_Match);
public JTextField getTxt_rec_process() {
return txt_rec_process;
public void setTxt_rec_process(JTextField txt_rec_process) {
JTextField oldTxt_rec_process=this.txt_rec_process;
this.txt_rec_process = txt_rec_process;
propertyChangeSupport.firePropertyChange("txt_rec_process", oldTxt_rec_process, txt_rec_process);
}

Changing javax.swing class

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