如果单击frame窗口右上角的关闭按钮能将其关闭，iframe禁止新窗口打开

分三种情况来说明：
???1. 用户类继承自Frame；
???2. Frame对象作为用户类的数据成员；

???3. 用户类继承自WindowAdapter.

1. 用户类继承自Frame：
代码如下：

[java]? view plain ?copy import?java.awt.*;??import?java.awt.event.*;??public??class?MyFrame?extends??Frame{??????public?void?display(){??????this.setTitle("MyFrame");??????this.setSize(480,200);??????this.setLocation?(200,400);??????this.setBackground?(Color.lightGray);?????this.setVisible(true);??}????public?static?void?main?(String?args[]){??????MyFrame?f?=?new?MyFrame();??????f.addWindowListener(new?WindowAdapter(){??????public?void?windowClosing(WindowEvent?e){??????????System.exit(0);??????}??????});??????f.display();??????}??}??

2. Frame对象作为用户类的数据成员：

代码如下：

[java]? view plain ?copy import?java.awt.*;??import?java.awt.event.*;??public???class?MyFrame2{???????Frame?f?=?new?Frame();???????MyFrame2(){???????????f.addWindowListener(new?WindowAdapter(){//为了关闭窗口???????????public?void?windowClosing(WindowEvent?e){???????????????System.exit(0);???????????}????????});???????}//注意为一个构造函数?????????public?void?display(){???????????f.setTitle("MyFrame");???????????f.setSize(480,200);???????????f.setLocation?(200,400);???????????f.setBackground?(Color.lightGray);???????????f.setVisible(true);???????}?????????public?static?void?main?(String?args[])???????{???????????new?MyFrame2().display();???????}??}??

3. 用户类继承自WindowAdapter，而窗口对象Frame作为用户类的数据成员.

代码如下：

[java]? view plain ?copy import?java.awt.*;??import?java.awt.event.*;??public???class?MyFrame3?extends?WindowAdapter{??????Frame?f?=?new?Frame();??????public?void?display(){??????????f.setTitle("MyFrame");??????????f.setSize(480,200);??????????f.setLocation?(200,400);??????????f.setBackground?(Color.lightGray);??????????f.addWindowListener?(this);??//窗体f－－注册窗体事件监听器??????????f.setVisible(true);??????}??????public?void?windowClosing(WindowEvent?e){??????????System.exit(0);??????}????????public?static?void?main?(String?args[]){??????????new?MyFrame3().display();??????}??}??

自己的代码：

红色是实现关闭Frame窗口的代码

public class PanelTest1 {/** * @param args */public static void main(String[] args) {// TODO Auto-generated method stubFrame frame=new Frame("测试程序");frame.setVisible(true);frame.setBounds(30, 30, 300, 300);Panel p=new Panel();p.add(new TextField(30));p.add(new Button("OK"));p.setBackground(Color.yellow);frame.add(p);frame.addWindowListener(new WindowAdapter() {public void windowClosing(WindowEvent e){System.exit(0);}});}}
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