testjframe1.java

来自「java2 primer plus一书源程序」· Java 代码 · 共 52 行

/*
 * TestJFrame1.java
 *
 * Created on July 30, 2002, 2:36 PM
 */

package ch16;
import javax.swing.*;

import java.awt.FlowLayout;
import java.awt.event.*;

/**
 *
 * @author  Stephen Potts
 * @version
 */
public class TestJFrame1 extends JFrame implements ActionListener
{
   JButton btnExit;
   
   /** Creates new TestJFrame1 */
   public TestJFrame1()
   {
      btnExit = new JButton("Exit");
      btnExit.addActionListener(this);
      
      getContentPane().add(btnExit);
      this.getContentPane().setLayout(new FlowLayout());
      this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     
      setTitle("Using JFrame Default Closing");
      setBounds( 100, 100, 300, 300);
      setVisible(true);
   }
   
   public void actionPerformed(ActionEvent ae)
   {
      if (ae.getActionCommand().equals("Exit"))
      {
           System.out.println("Preparing to close ");
           System.exit(0);
      }
   }
   
   public static void main(String[] args)
   {
      TestJFrame1 tjf = new TestJFrame1();
   }
   
}