Source of FirstWindow.java

Structures and functions

public class FirstWindow extends JFrame

  1: 
  2: import javax.swing.*;
  3: 
  4: /**
  5:  A simple window class.
  6: */
  7: public class FirstWindow extends JFrame
  8: {
  9:     public static final int WIDTH = 300;
 10:     public static final int HEIGHT = 200;
 11: 
 12:     public FirstWindow( )
 13:     {
 14:         super( );
 15: 
 16:         setSize(WIDTH, HEIGHT);
 17:         JLabel myLabel = new JLabel("Please don’t click that button!");
 18:         getContentPane( ).add(myLabel);
 19: 
 20:         WindowDestroyer listener = new WindowDestroyer( );
 21:         addWindowListener(listener);
 22:     }
 23: }