Name: dbT83986 Date: 01/10/99


If the Look and Feel is explicitly set during startup then any
attempt to set a default button will fail. The bug only exists
on the PC and only when setting the Look and Feel to either
Motif or Windows. The following code exhibits the problem. The
code sets the default button to the second button created, which
works fine as long as the Look and Feel isn't set or you run
on Unix. The command line options are as followings:

   java -cp . defaultButtonBug <<< no L&F is set
   java -cp . defaultButtonBug win <<< L&F set to Windows
   java -cp . defaultButtonBug motif <<< L&F set to Motif
   java -cp . defaultButtonBug * <<< L&F set to Metal

//~~~~~~~~~~~~~~~~~~~~~~~ cut here ~~~~~~~~~~~~~~~~~~~~~~~~~~~
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class defaultButtonBug extends JPanel {
    static JButton button1, button2;
    static String motifLNF = "com.sun.java.swing.plaf.motif.MotifLookAndFeel";
    static String windowsLNF = "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
    static String metalLNF = "javax.swing.plaf.metal.MetalLookAndFeel";

    public defaultButtonBug() {
        button1 = new JButton("Button #1");
        button2 = new JButton("Button #2");
        add(button1);
        add(button2);
    }

    public static void main(String s[]) {

        if (s.length > 0) {
            try {
                if (s[0].startsWith("win"))
                    UIManager.setLookAndFeel(windowsLNF); // Windows
                else if (s[0].equals("motif"))
                    UIManager.setLookAndFeel(motifLNF); // Motif
                else
                    UIManager.setLookAndFeel(metalLNF); // Metal
            } catch (Exception exc) {
                System.err.println("Error loading L&F: " + exc);
            }
        }

        JFrame frame = new JFrame("Default Button Bug");
        frame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {System.exit(0);}
        });
        frame.getContentPane().add(new defaultButtonBug());

        // ##### SET DEFAULT TO 2ND BUTTON #####
        frame.getRootPane().setDefaultButton(button2);

        frame.pack();
        frame.setVisible(true);
    }
}
(Review ID: 52315)
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