文本框的简单处理程序

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class haha extends Applet implements ActionListener
{
Label lb;
TextField in,out;
public void init()
{
lb=new Label("请输入您的名字");
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()+"欢迎光临！");
}
}