太晚了，来不及写知识点了，一切都在代码中

package com.cqvie;

import java.awt.BorderLayout;

import java.awt.EventQueue;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.border.EmptyBorder;

import javax.swing.JButton;

import javax.swing.JLabel;

import javax.swing.JTextField;

import java.awt.event.MouseAdapter;

import java.awt.event.MouseEvent;

import java.awt.event.ActionListener;

import java.awt.event.ActionEvent;

import javax.swing.JPasswordField;//一大堆看不懂的包含文件

public class yang extends JFrame {

 private JPanel contentPane;

 private JTextField txt1;

 private JButton btnOk;

 private JButton btnNo;

 private JPasswordField txt2;//全是那些乱七八糟的方框的名字

 /**

  * Launch the application.

  */

 public static void main(String[] args) {

  EventQueue.invokeLater(new Runnable() {

   public void run() {

    try {

     yang frame = new yang();

     frame.setVisible(true);

    } catch (Exception e) {

     e.printStackTrace();

    }

   }

  });//这是内部类？反正我现在还不懂，它自己生出来的

 }

 /**

  * Create the frame.

  */

 public yang() {//这一个函数全是那些方框什么的

  setTitle("\u7528\u6237");

  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

  setBounds(100, 100, 450, 300);

  contentPane = new JPanel();

  contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));

  setContentPane(contentPane);

  contentPane.setLayout(null);

  

  btnOk = new JButton("ok");

  btnOk.addActionListener(new ActionListener() {

   public void actionPerformed(ActionEvent arg0) {

   }

  });

  btnOk.addMouseListener(new MouseAdapter() {//实现鼠标什么的......

   @Override

   public void mouseClicked(MouseEvent e) {

    String useName=txt1.getText();

    String password=txt2.getText();

    if(useName.equals("abc")&& (password.equals("123"))){

     btnOk.setText("登陆中.....");

        btnNo.setText("点我取消");

       

    }

    else if (useName.equals("abc")&& (!password.equals("123"))){

     btnOk.setText("密码错误...");

        btnNo.setText("点我取消");

    }

    else if (!useName.equals("abc")){

     btnOk.setText("不存在该用户...");

        btnNo.setText("点我取消");

    }

    else {

     btnOk.setText("密码错误");

        btnNo.setText("不开心");//判断输入的用户名和密码是否正确

        //     this.useNameTxt.setText("");

     //String useName=this.userNameTxt.getText();

    }

   }

  });

//  btnOk.addMouseListener(new MouseAdapter() {

//   @Override

//   public void mouseClicked(MouseEvent arg0) {

//    btnOk.setText("不要点我");

//    btnNo.setText("点我");

//   }

//  });//这纯属好玩儿  嘿嘿

  btnOk.setBounds(149, 157, 93, 23);

  contentPane.add(btnOk);

  

  btnNo = new JButton("no");

  btnNo.addMouseListener(new MouseAdapter() {

   @Override

   public void mouseClicked(MouseEvent e) {

//    btnNo.setText("哎哟");

//    btnOk.setText("哈哈哈");

    

//    String useName=txt1.getText();

//    String passWord=txt2.getText();

    txt1.setText("");

    txt2.setText("");//清空那两个文本框（自学的哟   哈哈哈）

   

   }

  });

  btnNo.setBounds(149, 201, 93, 23);

  contentPane.add(btnNo);

  

  JLabel lblUserName = new JLabel("\u7528\u6237\u540D\uFF1A");

  lblUserName.setBounds(66, 43, 54, 15);

  contentPane.add(lblUserName);

  

  JLabel lblPassWord = new JLabel("  \u5BC6\u7801\uFF1A");

  lblPassWord.setBounds(66, 93, 54, 15);

  contentPane.add(lblPassWord);

  

  txt1 = new JTextField();

  txt1.addMouseListener(new MouseAdapter() {

   @Override

   public void mouseClicked(MouseEvent e) {

   }

  });

  txt1.setBounds(140, 38, 168, 21);

  contentPane.add(txt1);

  txt1.setColumns(10);

  

  txt2 = new JPasswordField();

  txt2.setBounds(140, 89, 168, 23);

  contentPane.add(txt2);//看不了，这些，无法翻译

 }

}

架构那个，昨天忘写了，好像都忘记了，明天再写不，好想把视频看完再回寝室啊~~~好不容易这么有感觉，时间不允许咯~~