文本框的简单事件处理

import java.applet.*;import java.awt.*;import java.awt.event.*;public class simpleEvent extends Applet implements ActionListener{Label lb;TextField in,out;public void init(){lb=new Label("请输入你的外号：");in=new TextField(6);out=new TextField(20);add(lb);add(in);add(out);in.addActionListener(this);}public void actionPerformed(ActionEvent e){out.setText(in.getText()+"我爱你！");}}