Swing I - Absolute Java - page 957

Display 17.4 The Normal Way to Dei ne a JFrame

1 import javax.swing.JFrame;
2 import javax.swing.JButton;

3 public class FirstWindow extends JFrame
4 {
5

public static final int WIDTH = 300;

6 public static final int HEIGHT = 200;

7 public FirstWindow()
8 {
9 super ();

10 setSize(WIDTH, HEIGHT);

11 setTitle("First Window Class");

12 setDefaultCloseOperation(

13 JFrame.DO_NOTHING_ON_CLOSE);

14 JButton endButton = new JButton("Click to end program.");

15 endButton.addActionListener( new EndingListener());

16 add(endButton);

17 }
18 }

The class EndingListener is defined in Display 17.2 .

This is the file FirstWindow.java .

This is the file DemoWindow.java .

1 public class DemoWindow
2 {
3 public static void main(String[] args)
4 {
5 FirstWindow w = new FirstWindow();
6 w.setVisible( true );
7 }
8 }

R ESULTING GUI