Run the attached program on b36. The button on the right panel never receives focus when "requestFocus" or "requestFocusInWindow" is called. In fact, even clicking on the button in the right panel will never have a FOCUS_GAINED event fired. The problem seems to start on b35 or b36.

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import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class NestedPanels extends JFrame {

    private JSplitPane split;
    private JPanel leftPanel, rightPanel;
    private JButton leftButton, rightButton;

    public static void main(String[] args) {
        new NestedPanels();
    }

    public NestedPanels() {
        leftButton = new JButton("Left Button");
        rightButton = new JButton("Right Button");
        rightButton.addFocusListener(new FocusListener() {
            public void focusGained(FocusEvent e) {
                System.out.println("Focus Gained");
            }

            public void focusLost(FocusEvent e) {}
        });

        leftPanel = new JPanel();
        rightPanel = new JPanel();

        leftPanel.add(leftButton);
        rightPanel.add(rightButton);

        split = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, leftPanel, rightPanel);

        setContentPane(split);

        setSize(300, 300);
        show();

        split.setDividerLocation(0.5);

        while(!rightButton.isVisible()) {
            try {
                Thread.sleep(1000);
            } catch(Exception e) {
                e.printStackTrace();
            }
        }

        rightButton.requestFocusInWindow();
    }
}

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edmund.lou@eng 2000-10-15
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