applet1.java

密码验证的java程序

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class Applet1 extends Applet implements ActionListener
{
	Label prompt;
	TextField text;
	String code;
	public void init()
	{
		code=new String("1234");
		prompt=new Label("输入密码("+code+")");
		text=new TextField(10);
		text.setEchoChar('*');
		add(prompt);
		add(text);
		text.addActionListener(this);
	}
	public void actionPerformed(ActionEvent e)
	{
		if(e.getSource()==text)
		{
			if(code.compareTo(text.getText())==0)
				prompt.setText("恭喜您通过认证");
			else prompt.setText("密码错误("+code+")");
		}
	}
}