登陆窗口小项目

1、输入正确账号和密码，点击登陆，提示“用户登陆成功”

2、输入错误密码，提示“用户登陆失败”

import java.awt.HeadlessException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;


import javax.swing.JButton;
import javax.swing.JFormattedTextField;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPasswordField;
import javax.swing.JTextField;


public class MapTest extends JFrame implements ActionListener {
    JLabel lb1,lb2;
    JTextField jt;
    JPasswordField jp;
    JButton jb1,jb2;
    String dl="123456";               //设定初始登录名和密码，此处将其写死了
    String pass="qwert";
    public MapTest(String title) throws HeadlessException{
        super(title);
        this.setSize(200,200);
        this.setLocation(500, 200);
        setLayout(new java.awt.FlowLayout());//设为流式布局
        //添加组件
        lb1=new JLabel("用户名：");
        this.add(lb1);
        jt=new JTextField(10);
//jt.addActionListener(this);
        this.add(jt);
        lb2=new JLabel("密码：");
        this.add(lb2);
        jp=new JPasswordField(10);
//jp.addActionListener(this);
        this.add(jp);
        jb1=new JButton("登录");
        this.add(jb1);
        jb1.addActionListener(this);
        jb2=new JButton("取消");
        jb2.addActionListener(this);
        this.add(jb2);
        this.setResizable(false);
        this.setDefaultCloseOperation(EXIT_ON_CLOSE);
        this.setVisible(true);

    }
    @Override
    public void actionPerformed(ActionEvent e){
        // TODO Auto-generated method stub
        if(e.getSource()==jb1) {
            String str1=jt.getText();
            String str2=String.valueOf(jp.getPassword());
            if(str1.matches(dl) && str2.matches(pass)){
                JOptionPane.showMessageDialog(this, "用户登录成功");}
            else{
                JOptionPane.showMessageDialog(this, "用户登录失败","消息提示",JOptionPane.WARNING_MESSAGE);
                jp.setText("");
            }
        }
        if(e.getSource()==jb2){
            dispose();
        }
    }
    public static void main(String args[]){
        new MapTest("登陆");
    }

}