newframedemo.java

窗口的退出方法.rar

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;



class NewFrameDemo extends JFrame{
  
  public NewFrameDemo() {
       
    //设置新窗口的标题,大小及位置
    this.setTitle("新窗口");
    this.setSize(new Dimension(400,300));
    this.setLocation(200,200);
    this.setVisible(true); //显示新窗口
   }

  //当窗口关闭时的处理代码
  protected void processWindowEvent(WindowEvent e) {
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      //重新显示窗口的总数
     // this.dispose();            //清空窗口的内存
     System.exit(0);
    }
  }
  public static void main(String[] args){
  	NewFrameDemo nfd=new NewFrameDemo();
  }
}