Program: 21148
Project: 21148
Buggy source:
public CountdownConfirmDialog(final Frame owner,final String title,final int countdown,final boolean defaultResult,final Dimension size,final int style,final String... msg){
  super(owner);
  this.titleText=title;
  if (title != null)   this.setTitle(title);
  setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
  setModal(true);
  if ((style & STYLE_NOTALWAYSONTOP) == 0)   setAlwaysOnTop(true);
  addWindowListener(new WindowListener(){
    public void windowActivated(    WindowEvent e){
    }
    public void windowClosed(    WindowEvent e){
      window_Closed=true;
      setVisible(false);
    }
    public void windowClosing(    WindowEvent e){
    }
    public void windowDeactivated(    WindowEvent e){
    }
    public void windowDeiconified(    WindowEvent e){
    }
    public void windowIconified(    WindowEvent e){
    }
    public void windowOpened(    WindowEvent e){
    }
  }
);
  setLayout(new GridBagLayout());
  countdownThread=new Thread(){
    @Override public void run(){
      while (!isVisible() && isDisplayable()) {
        try {
          Thread.sleep(50);
        }
 catch (        InterruptedException e) {
          e.printStackTrace();
        }
      }
      int c=countdown;
      while (--c >= 0) {
        if (countdownThread == null) {
          return;
        }
        if (titleText != null) {
          setTitle(JDUtilities.formatSeconds(c) + "String_Node_Str" + titleText);
        }
 else {
          setTitle(JDUtilities.formatSeconds(c) + "String_Node_Str");
        }
        try {
          Thread.sleep(1000);
        }
 catch (        InterruptedException e) {
        }
        if (!isVisible()) {
          return;
        }
      }
      result=defaultResult;
      setVisible(false);
    }
  }
;
  if ((style & STYLE_NO_MSGLABLE) == 0) {
    if ((style & STYLE_MSGLABLE) != 0) {
      htmlArea=new JLabel(msg[0]);
    }
 else {
      htmlArea=new JTextPane();
      ((JTextPane)htmlArea).setEditable(false);
      ((JTextPane)htmlArea).setContentType("String_Node_Str");
      ((JTextPane)htmlArea).setText(msg[0]);
      ((JTextPane)htmlArea).requestFocusInWindow();
      ((JTextPane)htmlArea).addHyperlinkListener(this);
    }
  }
  if ((style & STYLE_INPUTFIELD) != 0) {
    if (msg != null) {
      if ((style & STYLE_NO_MSGLABLE) != 0) {
        inputField=new JTextField(msg[0]);
      }
 else       if (msg.length > 1) {
        inputField=new JTextField(msg[1]);
      }
    }
    if (inputField == null)     inputField=new JTextField();
    inputField.addKeyListener(new KeyListener(){
      public void keyPressed(      KeyEvent e){
      }
      public void keyReleased(      KeyEvent e){
      }
      public void keyTyped(      KeyEvent e){
        if (countdownThread != null && countdownThread.isAlive()) {
          countdownThread.interrupt();
        }
        countdownThread=null;
      }
    }
);
  }
  int g=0;
  if ((style & STYLE_NO_MSGLABLE) == 0) {
    scrollPane=new JScrollPane(htmlArea);
    JDUtilities.addToGridBag(this,scrollPane,0,g++,3,1,1,1,null,GridBagConstraints.BOTH,GridBagConstraints.NORTHWEST);
  }
  if ((style & STYLE_INPUTFIELD) != 0)   JDUtilities.addToGridBag(this,inputField,0,g++,3,1,1,1,null,GridBagConstraints.BOTH,GridBagConstraints.NORTHWEST);
  if ((style & STYLE_DETAILLABLE) != 0) {
    final JButton btnDetails=new JButton(JDLocale.L("String_Node_Str","String_Node_Str"));
    final JPanel pan=new JPanel();
    btnDetails.addActionListener(new ActionListener(){
      public void actionPerformed(      ActionEvent e){
        JTextArea detailLable=new JTextArea();
        detailLable.setText(msg[1]);
        detailLable.setEditable(false);
        JScrollPane sp=new JScrollPane(detailLable,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
        sp.setPreferredSize(new Dimension(getWidth() - 20,200));
        setSize(new Dimension(getWidth(),getHeight() + 200 - btnDetails.getHeight()));
        pan.remove(btnDetails);
        pan.invalidate();
        pan.repaint();
        pan.add(sp);
        sp.repaint();
        sp.validate();
        pan.validate();
        countdownThread=null;
      }
    }
);
    pan.add(btnDetails);
    JDUtilities.addToGridBag(this,pan,0,g++,3,1,1,1,null,GridBagConstraints.BOTH,GridBagConstraints.NORTHWEST);
  }
  int d=0;
  if ((style & STYLE_STOP_COUNTDOWN) != 0) {
    btnCnTh=new JButton(JDLocale.L("String_Node_Str","String_Node_Str"));
    btnCnTh.addActionListener(this);
    JDUtilities.addToGridBag(this,btnCnTh,d++,2,1,1,0,0,null,GridBagConstraints.NONE,GridBagConstraints.WEST);
  }
  if ((style & STYLE_OK) != 0 || (style & STYLE_YES) != 0) {
    btnOK=new JButton((style & STYLE_YES) != 0 ? JDLocale.L("String_Node_Str","String_Node_Str") : JDLocale.L("String_Node_Str","String_Node_Str"));
    btnOK.addActionListener(this);
    getRootPane().setDefaultButton(btnOK);
    JDUtilities.addToGridBag(this,btnOK,d++,2,1,1,1,0,null,GridBagConstraints.NONE,GridBagConstraints.EAST);
  }
  if ((style & STYLE_CANCEL) != 0 || (style & STYLE_NO) != 0) {
    btnBAD=new JButton((style & STYLE_NO) != 0 ? JDLocale.L("String_Node_Str","String_Node_Str") : JDLocale.L("String_Node_Str","String_Node_Str"));
    btnBAD.addActionListener(this);
    JDUtilities.addToGridBag(this,btnBAD,d++,2,1,1,0,0,null,GridBagConstraints.NONE,GridBagConstraints.EAST);
  }
  pack();
  if (size != null) {
    int width=size.width;
    int hight=size.height;
    if (width < 0 || getWidth() > width)     width=getWidth();
    if (hight < 0 || getHeight() > hight)     hight=getHeight();
    setSize(width,hight);
  }
  setLocation(JDUtilities.getCenterOfComponent(null,this));
  countdownThread.start();
  setVisible(true);
}

Fixed version (ground truth):
public CountdownConfirmDialog(final Frame owner,final String title,final int countdown,final boolean defaultResult,final Dimension size,final int style,final String... msg){
  super(owner);
  this.titleText=title;
  if (title != null)   this.setTitle(title);
  setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
  setModal(true);
  if ((style & STYLE_NOTALWAYSONTOP) == 0)   setAlwaysOnTop(true);
  addWindowListener(new WindowListener(){
    public void windowActivated(    WindowEvent e){
    }
    public void windowClosed(    WindowEvent e){
      window_Closed=true;
      setVisible(false);
    }
    public void windowClosing(    WindowEvent e){
    }
    public void windowDeactivated(    WindowEvent e){
    }
    public void windowDeiconified(    WindowEvent e){
    }
    public void windowIconified(    WindowEvent e){
    }
    public void windowOpened(    WindowEvent e){
    }
  }
);
  setLayout(new GridBagLayout());
  countdownThread=new Thread(){
    @Override public void run(){
      while (!isVisible() && isDisplayable()) {
        try {
          Thread.sleep(50);
        }
 catch (        InterruptedException e) {
          e.printStackTrace();
        }
      }
      int c=countdown;
      while (--c >= 0) {
        if (countdownThread == null) {
          return;
        }
        if (titleText != null) {
          setTitle(JDUtilities.formatSeconds(c) + "String_Node_Str" + titleText);
        }
 else {
          setTitle(JDUtilities.formatSeconds(c) + "String_Node_Str");
        }
        try {
          Thread.sleep(1000);
        }
 catch (        InterruptedException e) {
        }
        if (!isVisible()) {
          return;
        }
      }
      result=defaultResult;
      setVisible(false);
    }
  }
;
  if ((style & STYLE_NO_MSGLABLE) == 0) {
    if ((style & STYLE_MSGLABLE) != 0) {
      htmlArea=new JLabel(msg[0]);
    }
 else {
      htmlArea=new JTextPane();
      ((JTextPane)htmlArea).setEditable(false);
      ((JTextPane)htmlArea).setContentType("String_Node_Str");
      ((JTextPane)htmlArea).setText(msg[0]);
      ((JTextPane)htmlArea).requestFocusInWindow();
      ((JTextPane)htmlArea).addHyperlinkListener(this);
    }
  }
  if ((style & STYLE_INPUTFIELD) != 0) {
    if (msg != null) {
      if ((style & STYLE_NO_MSGLABLE) != 0) {
        inputField=new JTextField(msg[0]);
      }
 else       if (msg.length > 1) {
        inputField=new JTextField(msg[1]);
      }
    }
    if (inputField == null)     inputField=new JTextField();
    inputField.addKeyListener(new KeyListener(){
      public void keyPressed(      KeyEvent e){
      }
      public void keyReleased(      KeyEvent e){
      }
      public void keyTyped(      KeyEvent e){
        if (countdownThread != null && countdownThread.isAlive()) {
          countdownThread.interrupt();
        }
        countdownThread=null;
      }
    }
);
    input=inputField.getText();
  }
  int g=0;
  if ((style & STYLE_NO_MSGLABLE) == 0) {
    scrollPane=new JScrollPane(htmlArea);
    JDUtilities.addToGridBag(this,scrollPane,0,g++,3,1,1,1,null,GridBagConstraints.BOTH,GridBagConstraints.NORTHWEST);
  }
  if ((style & STYLE_INPUTFIELD) != 0)   JDUtilities.addToGridBag(this,inputField,0,g++,3,1,1,1,null,GridBagConstraints.BOTH,GridBagConstraints.NORTHWEST);
  if ((style & STYLE_DETAILLABLE) != 0) {
    final JButton btnDetails=new JButton(JDLocale.L("String_Node_Str","String_Node_Str"));
    final JPanel pan=new JPanel();
    btnDetails.addActionListener(new ActionListener(){
      public void actionPerformed(      ActionEvent e){
        JTextArea detailLable=new JTextArea();
        detailLable.setText(msg[1]);
        detailLable.setEditable(false);
        JScrollPane sp=new JScrollPane(detailLable,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
        sp.setPreferredSize(new Dimension(getWidth() - 20,200));
        setSize(new Dimension(getWidth(),getHeight() + 200 - btnDetails.getHeight()));
        pan.remove(btnDetails);
        pan.invalidate();
        pan.repaint();
        pan.add(sp);
        sp.repaint();
        sp.validate();
        pan.validate();
        countdownThread=null;
      }
    }
);
    pan.add(btnDetails);
    JDUtilities.addToGridBag(this,pan,0,g++,3,1,1,1,null,GridBagConstraints.BOTH,GridBagConstraints.NORTHWEST);
  }
  int d=0;
  if ((style & STYLE_STOP_COUNTDOWN) != 0) {
    btnCnTh=new JButton(JDLocale.L("String_Node_Str","String_Node_Str"));
    btnCnTh.addActionListener(this);
    JDUtilities.addToGridBag(this,btnCnTh,d++,2,1,1,0,0,null,GridBagConstraints.NONE,GridBagConstraints.WEST);
  }
  if ((style & STYLE_OK) != 0 || (style & STYLE_YES) != 0) {
    btnOK=new JButton((style & STYLE_YES) != 0 ? JDLocale.L("String_Node_Str","String_Node_Str") : JDLocale.L("String_Node_Str","String_Node_Str"));
    btnOK.addActionListener(this);
    getRootPane().setDefaultButton(btnOK);
    JDUtilities.addToGridBag(this,btnOK,d++,2,1,1,1,0,null,GridBagConstraints.NONE,GridBagConstraints.EAST);
  }
  if ((style & STYLE_CANCEL) != 0 || (style & STYLE_NO) != 0) {
    btnBAD=new JButton((style & STYLE_NO) != 0 ? JDLocale.L("String_Node_Str","String_Node_Str") : JDLocale.L("String_Node_Str","String_Node_Str"));
    btnBAD.addActionListener(this);
    JDUtilities.addToGridBag(this,btnBAD,d++,2,1,1,0,0,null,GridBagConstraints.NONE,GridBagConstraints.EAST);
  }
  pack();
  if (size != null) {
    int width=size.width;
    int hight=size.height;
    if (width < 0 || getWidth() > width)     width=getWidth();
    if (hight < 0 || getHeight() > hight)     hight=getHeight();
    setSize(width,hight);
  }
  setLocation(JDUtilities.getCenterOfComponent(null,this));
  countdownThread.start();
  setVisible(true);
}