LX5_6() {

super("添加组件的窗口");

addWindowListener(new WindowAdapter() {

public void windowClosing(WindowEvent e) {

System.exit(0);

}

});

setSize(350,250); //设置窗口大小

setLocation(200,200);//设置窗口显示位置

setFont(new Font("Arial",Font.PLAIN,12)); //设置字体

setLayout(new FlowLayout());

Area=new TextArea (6,40);

tf1=new TextField(10); tf2=new TextField(10);

btn1=new Button("显示"); btn2=new Button("退出");

f=new TextField(20);

add(Area); add(new Label("用户名"));

add(tf1); add(new Label("电话"));

add(tf2); add(f); add(btn1); add(btn2);

tf1.addActionListener(this); tf2.addActionListener(this);

btn1.addActionListener(this); btn2.addActionListener(this);

show();

}

public static void main(String args[]) {

new LX5_6();

}

public void actionPerformed(ActionEvent e) {

if (e.getSource()==btn1)

f.setText("你按下了“" + e.getActionCommand() + "”按钮");

if (e.getSource()==tf1)

Area.append("用户名："+tf1.getText()+"\n");

if (e.getSource()==tf2)

Area.append("电 话："+tf2.getText()+"\n");

if (e.getSource()==btn2) {

for (int i=0; i<100000000; i++);

dispose();//只关闭当前窗口,注销该对象

}

}

}

（3）编译并运行程序，界面窗口如图6.6 所示。