/*

通过dispatchEvent(WindowEvent)来显示关闭窗口

*/

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class FrameTest extends JFrame implements ActionListener

{

  private JButton close;

  public FrameTest()

  {

    super("关闭窗口");

    Container c=getContentPane();

    c.setLayout(new FlowLayout());

    close=new JButton("关闭");

    close.addActionListener(this);

    this.add(close);

    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    setSize(500,300);

    setVisible(true);

  }

  public void actionPerformed(ActionEvent e)

  {

    Object obj=e.getSource();

    if(obj==close)

    {

      WindowEvent event=new WindowEvent(this,WindowEvent.WINDOW_CLOSING);

      //下面两种方式都可以

      this.dispatchEvent(event);

      //Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(event);

    }

  }

  public static void main(String[] args)

  {

    new FrameTest();

  }

}