While perusing a newsgroup I found a simple subclass of JTabbedPane that
includes an X icon for deleting tabs.  However, when I tried it I
periodically get ArrayIndexOutOfBounds exceptions on the event thread when
deleting tabs - not sure why.  Stack trace and code below.

Thanks in Advance,
Mike

Exception in thread "AWT-EventQueue-0"
java.lang.ArrayIndexOutOfBoundsException: 0

at javax.swing.plaf.basic.BasicTabbedPaneUI.getTabBounds(Unknown Source)

at javax.swing.plaf.basic.BasicTabbedPaneUI.getTabBounds(Unknown Source)

at
com.sun.java.swing.plaf.windows.WindowsTabbedPaneUI.setRolloverTab(Unknown
Source)

at
javax.swing.plaf.basic.BasicTabbedPaneUI$TabbedPaneLayout.layoutContainer(Unknown
Source)

at java.awt.Container.layout(Unknown Source)

at java.awt.Container.doLayout(Unknown Source)

at java.awt.Container.validateTree(Unknown Source)

at java.awt.Container.validateTree(Unknown Source)

at java.awt.Container.validate(Unknown Source)

at javax.swing.RepaintManager.validateInvalidComponents(Unknown Source)

at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(Unknown
Source)

at java.awt.event.InvocationEvent.dispatch(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)

---------------------------

public class JTabbedPaneWithCloseIcons extends JTabbedPane implements
MouseListener {
 public JTabbedPaneWithCloseIcons() {
   super();
   addMouseListener(this);
 }

 public void addTab(String title, Component component) {
   this.addTab(title, component, null);
 }

 public void addTab(String title, Component component, Icon extraIcon) {
   super.addTab(title, new CloseTabIcon(extraIcon), component);
 }

 public void addTab(String title, Icon extraIcon, Component component,
String tip) {
  super.addTab(title, new CloseTabIcon(extraIcon), component, tip);
 }

 public void insertTab(String title, Icon extraIcon, Component component,
String tip, int index) {
  super.insertTab(title, extraIcon, component, tip, index);
 }

 public void mouseClicked(MouseEvent e) {}
 public void mouseEntered(MouseEvent e) {}
 public void mouseExited(MouseEvent e) {}
 public void mousePressed(MouseEvent e) {}
 public void mouseReleased(MouseEvent e) {
    final int tabNumber=getUI().tabForCoordinate(this, e.getX(), e.getY());
    if (tabNumber < 0) return;
    Rectangle rect=((CloseTabIcon)getIconAt(tabNumber)).getBounds();
    if (rect.contains(e.getX(), e.getY())) {
      //the tab is being closed
    this.removeTabAt(tabNumber);
    }
 }
}

/**
* The class which generates the 'X' icon for the tabs. The constructor
* accepts an icon which is extra to the 'X' icon, so you can have tabs
* like in JBuilder. This value is null if no extra icon is required.
*/
class CloseTabIcon implements Icon {
 private int x_pos;
 private int y_pos;
 private int width;
 private int height;
 private Icon fileIcon;

 public CloseTabIcon(Icon fileIcon) {
   this.fileIcon=fileIcon;
   width=16;
   height=16;
 }

 public void paintIcon(Component c, Graphics g, int x, int y) {
   this.x_pos=x;
   this.y_pos=y;

   Color col=g.getColor();

   g.setColor(Color.black);
   int y_p=y+2;
   g.drawLine(x+1, y_p, x+12, y_p);
   g.drawLine(x+1, y_p+13, x+12, y_p+13);
   g.drawLine(x, y_p+1, x, y_p+12);
   g.drawLine(x+13, y_p+1, x+13, y_p+12);
   g.drawLine(x+3, y_p+3, x+10, y_p+10);
   g.drawLine(x+3, y_p+4, x+9, y_p+10);
   g.drawLine(x+4, y_p+3, x+10, y_p+9);
   g.drawLine(x+10, y_p+3, x+3, y_p+10);
   g.drawLine(x+10, y_p+4, x+4, y_p+10);
   g.drawLine(x+9, y_p+3, x+3, y_p+9);
   g.setColor(col);
   if (fileIcon != null) {
     fileIcon.paintIcon(c, g, x+width, y_p);
   }
 }

 public int getIconWidth() {
   return width + (fileIcon != null? fileIcon.getIconWidth() : 0);
 }

 public int getIconHeight() {
   return height;
 }

 public Rectangle getBounds() {
   return new Rectangle(x_pos, y_pos, width, height);
 }
}