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  1. JDK
  2. JDK-6495408

REGRESSION: JTabbedPane throws ArrayIndexOutOfBoundsException

    Details

    • Subcomponent:
    • Resolved In Build:
      b03
    • CPU:
      x86
    • OS:
      windows_xp
    • Verification:
      Verified

      Backports

        Description

        FULL PRODUCT VERSION :
        java version "1.5.0_09"
        Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_09-b01)
        Java HotSpot(TM) Client VM (build 1.5.0_09-b01, mixed mode)

        ADDITIONAL OS VERSION INFORMATION :
        Microsoft Windows XP [Version 5.1.2600]

        A DESCRIPTION OF THE PROBLEM :
        ArrayIndexOutOfBoundsException at javax.swing.plaf.basic.BasicTabbedPaneUI.tabForCoordinate(BasicTabbedPaneUI.java:1286) with a JTabbedPane with tab position LEFT. Seems to be a regression of bug 4962642 which is marked as fixed, reproducible always when the mouse pointer is over the position where the new tab will appear.


        STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
        See bug 4962642, exception is reproducible always when the mouse pointer is over the position where the new tab will appear.

        Turns out reproducing this was not as trivial as I thought, seems to involve a critical timing issue somewhere. Anyway, long story short, the code below reliably reproduces the Exception I see in my code. Key seems to be time spent generating or rendering the icon on the tab (tabs in my app have thumbnails in them).

        ERROR MESSAGES/STACK TRACES THAT OCCUR :
        Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 1
                at javax.swing.plaf.basic.BasicTabbedPaneUI.tabForCoordinate(BasicTabbedPaneUI.java:1286)
                at javax.swing.plaf.basic.BasicTabbedPaneUI.setRolloverTab(BasicTabbedPaneUI.java:499)
                at javax.swing.plaf.basic.BasicTabbedPaneUI.access$1200(BasicTabbedPaneUI.java:37)
                at javax.swing.plaf.basic.BasicTabbedPaneUI$Handler.mouseEntered(BasicTabbedPaneUI.java:3219)
                at java.awt.Component.processMouseEvent(Component.java:5497)
                at javax.swing.JComponent.processMouseEvent(JComponent.java:3126)
                at java.awt.Component.processEvent(Component.java:5253)
                at java.awt.Container.processEvent(Container.java:1966)
                at java.awt.Component.dispatchEventImpl(Component.java:3955)
                at java.awt.Container.dispatchEventImpl(Container.java:2024)
                at java.awt.Component.dispatchEvent(Component.java:3803)
                at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212)
                at java.awt.LightweightDispatcher.trackMouseEnterExit(Container.java:4017)
                at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3874)
                at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822)
                at java.awt.Container.dispatchEventImpl(Container.java:2010)
                at java.awt.Window.dispatchEventImpl(Window.java:1778)
                at java.awt.Component.dispatchEvent(Component.java:3803)
                at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
                at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
                at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
                at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
                at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
                at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)


        ---------- BEGIN SOURCE ----------
        import java.awt.*;
        import javax.swing.*;
        import static java.awt.RenderingHints.*;
        import java.awt.event.KeyEvent;
        import java.awt.geom.GeneralPath;
        public class BugReport {
            public static void main(String[] args) throws Exception {
                UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
               
                final JTabbedPane tabs = new JTabbedPane();
                tabs.setTabPlacement(JTabbedPane.LEFT);
               
                // Another (bonus) bug - if one of the tabs has html text in it
                // adding a tab with a null component will then generate an NPE
                // in Vector.elementAt(), uncomment the line below to see this
                tabs.addTab("<HTML><FONT size = 10>TAB</FONT></HTML>",new JPanel());
                tabs.addTab(null, new TabIcon(), new JPanel());
               
                JFrame frame = new JFrame("Bug Report");
                frame.setContentPane(tabs);
                frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE);
                frame.setBounds(100,100,200,600);
                frame.setVisible(true);
               
                Thread.sleep(1000);
               
                final Robot robot = new Robot();
                final Rectangle d = new Rectangle();
                final Point p = new Point();
               
                Runnable runner = new Runnable(){
                    public void run(){
                        try {
                            for (int i=0; i<7; i++){
                                Thread.sleep(1000);
                                SwingUtilities.invokeLater(new Runnable(){
                                    public void run(){
                                        int tab = tabs.getTabCount()-1;
                                        d.setBounds(tabs.getBoundsAt(tab));
                                        p.setLocation(d.x+d.width/2,d.y+d.height/2);
                                        SwingUtilities.convertPointToScreen(p,tabs);
                                        robot.mouseMove(p.x,p.y+d.height);
                                        tabs.addTab(null, new TabIcon(), null);
                                    }
                                });
                            }
                        } catch (Exception ex) {}
                    }
                };
                runner.run();
            }
           
            static final class TabIcon implements Icon {
                final int W = 60;
                public TabIcon() {
                }
                public int getIconHeight() {
                    return W;
                }
                public int getIconWidth() {
                    return W;
                }
                public void paintIcon(Component c, Graphics g, int x, int y) {
                    Graphics2D g2 = (Graphics2D)g.create();
                    Color iconColor = Color.BLUE;
                    g2.setRenderingHint(KEY_ANTIALIASING, VALUE_ANTIALIAS_ON);
                    g2.setRenderingHint(KEY_RENDERING, VALUE_RENDER_QUALITY);
                    g2.setColor(Color.BLUE);
                    g2.fillOval(x, y, W, W);
                    g2.setColor(Color.RED);
                    GeneralPath path = new GeneralPath();
                    path.moveTo(x+W/2,y+W/2);
                    for (int i=0; i<10000; i++){
                        path.lineTo(x+W/4+(float)Math.random()*W/2, y+W/4+(float)Math.random()*W/2);
                    }
                    g2.draw(path);
                    g2.dispose();
                }
            }
        }
        ---------- END SOURCE ----------


        REPRODUCIBILITY :
        This bug can be reproduced always.

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                • Assignee:
                  alexp Alexander Potochkin (Inactive)
                  Reporter:
                  ndcosta Nelson Dcosta (Inactive)
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                  • Created:
                    Updated:
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