testcomponentlistener.java

java2 primer plus一书源程序

/*
 * TestComponentListener.java
 *
 * Created on July 30, 2002, 2:36 PM
 */

package ch14;
import java.awt.*;
import java.awt.event.*;

/**
 *
 * @author  Stephen Potts
 * @version
 */
public class TestComponentListener extends Frame implements ComponentListener
{
   Button btnExit;
   
   /** Creates new TestComponentListener*/
   public TestComponentListener()
   {
      btnExit = new Button("Exit");
      btnExit.setFont(new Font("Courier", Font.BOLD, 24));

      btnExit.setBackground(Color.cyan);
      addComponentListener(this);
      
      add(btnExit);
      this.setLayout(new FlowLayout());
     
      addWindowListener(new WinCloser());
      setTitle("Using a ComponentListener");
      setBounds( 100, 100, 300, 300);
      setVisible(true);
   }
   
   public void componentResized(ComponentEvent ce)
   {
       System.out.println("Component resized");
   }
   public void componentMoved(ComponentEvent ce)
   {
       System.out.println("Component moved");
   }
   public void componentHidden(ComponentEvent ce)
   {
       System.out.println("Component hidden");
   }
   public void componentShown(ComponentEvent ce)
   {
       System.out.println("Component shown");
   }
   
    
   public static void main(String[] args)
   {
      TestComponentListener tcl = new TestComponentListener();
   }
   
}

class WinCloser extends WindowAdapter
{
   public void windowClosing(WindowEvent e)
   {
      System.exit(0);
   }
}