Name: rk38400 Date: 05/01/98


Run the following code:
Creates a JFrame and a JDialog and adds focus
listeners for both of them. start the application.

Observe that only the last window active will get focus
lost and gained messages. However if the following
code where non-swing, using Frame and Dialog, the
focus events are received properly.

CODE:

import java.awt.*;
import java.awt.event.*;
import com.sun.java.swing.*;

public class FocusTest
{
    public static void main(String[] args)
    {
        JFrame frameOne = new JFrame("JFrame");
        frameOne.setSize(200, 200);
        frameOne.addFocusListener(new FocusListener()
            {
                public void focusGained(FocusEvent event)
                {
                    System.out.println(((JFrame)event.getSource()).getTitle() + " got focus");
                }

                public void focusLost(FocusEvent event)
                {
                    System.out.println(((JFrame)event.getSource()).getTitle() + " lost focus");
                }
            });

        Dialog dialog = new Dialog(frameOne, "JDialog", false);
        dialog.setSize(200, 200);
        dialog.addFocusListener(new FocusListener()
            {
                public void focusGained(FocusEvent event)
                {
                    System.out.println(((Dialog)event.getSource()).getTitle() + " got focus");
                }

                public void focusLost(FocusEvent event)
                {
                    System.out.println(((Dialog)event.getSource()).getTitle() + " lost focus");
                }
            });

        frameOne.setVisible(true);
        dialog.setVisible(true);
    }
}
(Review ID: 29484)
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