Java Swing simple login registration window

foreword

Recently, I wrote a simple login and registration window while learning Java Swing.
This project includes the creation of JFrame, some component exercises and added simple event monitoring and simple user name and password judgment.
The login and registration pages are only drawn without adding other components

introduce

1, Swing is a GUI toolkit designed for Java.
2, Swing is part of the JAVA foundation class.
3, Swing includes graphical user interface (GUI) devices such as: text boxes, buttons, separate panes and tables.
4, Swing provides many better screen display elements than AWT. They're written in pure Java, so they're as cross-platform as Java itself, unlike AWT. They are part of JFC. They support replaceable panels and themes (default themes unique to various operating systems), but instead of really using the devices provided by the native platform, they only mimic them superficially. This means you can use any panel supported by JAVA on any platform. The disadvantage of lightweight components is slower execution speed, and the advantage is that they can adopt uniform behavior on all platforms.

analyze

1. First create a JFrame window and set it
2. Add corresponding components
3. Add judgment to the user name and password
4. Add monitoring events to the corresponding buttons
5. Draw the login and registration pages

Project display

Login to main page

Username and password judgment

Login successfully enter the page

registration page

code display

Index class (main class)

public class Index {
    
    
    public static void main(String[] args) {
    
    
        Creat l=new Creat();
        l.creatJf();
    }
}

Create class (basically every line is commented)

package com.qiku.work.work0926;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;


public class Creat {
    
    
    public void creatJf() {
    
    
              /*  //使用awt工具箱
        Toolkit tk = Toolkit.getDefaultToolkit();
        Image image = tk.getImage("com/qiku/work/work0926/img.jpg");*/
        //创建JFrame实例
        JFrame frame = new JFrame("Login");
        //设置窗体宽高
        frame.setSize(350, 200);
        frame.setLocationRelativeTo(null); //设置窗口居中显示
        //设置关闭窗口结束程序
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        //设置窗体禁止调节大小
        frame.setResizable(false);
      /*  //改变窗口默认图标
        frame.setIconImage(image);*/
        //创建面板
        JPanel jPanel = new JPanel();

        jPanel.setLayout(null); //布局设置为空，之后可以手动设置组件的坐标位置和大小

        //创建JLabel(用户名)
        JLabel user_label = new JLabel("用户名:");
        user_label.setFont(new Font("微软雅黑", 0, 13));
        //定义组件的位置和宽高
        user_label.setBounds(10, 20, 80, 25);
        //把组件添加到JPanel上
        jPanel.add(user_label);

        //创建文不域用于用户输入
        JTextField user_text = new JTextField(20);
        //设置文本域的位置和宽高
        user_text.setBounds(100, 20, 165, 25);
        //把文本域组件添加上
        jPanel.add(user_text);

        //创建JLabel(密码)
        JLabel password_label = new JLabel("密码:");
        password_label.setFont(new Font("微软雅黑", 0, 13));
        //设置位置和大小
        password_label.setBounds(10, 50, 80, 25);
        //添加组件
        jPanel.add(password_label);

        //密码文本域输入
        JPasswordField password_text = new JPasswordField();  //密码输入框，输入密码自动隐藏
        //JTextField password_text = new JTextField(20);
        password_text.setBounds(100, 50, 165, 25);

        jPanel.add(password_text);


        //登录按钮
        JButton login = new JButton("登录");
        login.setBounds(80, 100, 80, 25);


        //注册按钮
        JButton register = new JButton("注册");
        register.setBounds(200, 100, 80, 25);

        jPanel.add(register);

        jPanel.add(login);


        //添加面板
        frame.add(jPanel);
        //设置可见
        frame.setVisible(true);
        LoginListener ll = new LoginListener(frame, user_text, password_text);
        login.addActionListener(ll);

        ReListener re = new ReListener();
        register.addActionListener(re);

    }

    public class ReListener implements ActionListener {
    
    

        @Override
        public void actionPerformed(ActionEvent e) {
    
    
            Register.reShow();
        }
    }

    public class LoginListener implements ActionListener {
    
    
        private javax.swing.JTextField jt;//账号输入框对象
        private javax.swing.JPasswordField jp;//密码输入框对象
        private javax.swing.JFrame login;//定义一个窗体对象

        public LoginListener(javax.swing.JFrame login, javax.swing.JTextField jt, javax.swing.JPasswordField jp) {
    
    
            this.login = login;//获取登录界面
            this.jt = jt;//获取登录界面中的账号输入框对象
            this.jp = jp;//获取登录界面中的密码输入框对象
        }

        public void actionPerformed(ActionEvent e) {
    
    
            //用户名密码判断
            if (jt.getText().equals("user") && jp.getText().equals("root")) {
    
    
                //设置弹框
                JOptionPane.showMessageDialog(null, "登陆成功", "成功", 1);
                Login.createShow();
                login.setVisible(false);
            } else if (!(jt.getText().equals("1") && jp.getText().equals("1"))) {
    
    
                JOptionPane.showMessageDialog(null, "登录名或密码错误", "失败", 0);
            }

        }
    }
}

Login class

package com.qiku.work.work0926;

import javax.swing.*;
import java.awt.*;


public class Login {
    
    
    public static void createShow() {
    
    
        //创建JFrame实例
        JFrame frame = new JFrame("欢迎您");
        //设置窗体宽高
        frame.setSize(600, 400);
        frame.setLocationRelativeTo(null); //设置窗口居中显示
        //设置窗体禁止调节大小
        frame.setResizable(false);
        //创建面板
        JPanel jPanel = new JPanel();
        jPanel.setLayout(null);

        JLabel label = new JLabel("欢迎您!");
        label.setBounds(250, 0, 100, 25);
        label.setFont(new Font("微软雅黑", Font.BOLD, 25));
        label.setForeground(Color.red);
        jPanel.add(label);
        //关闭窗口结束程序
        frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE);
        //显示窗口
        frame.setVisible(true);

        //添加面板
        frame.add(jPanel);
        //设置可见
        frame.setVisible(true);
    }
}

Register class (almost the same as Login)

package com.qiku.work.work0926;

import javax.swing.*;
import java.awt.*;


public class Register {
    
    
    public static void reShow() {
    
    
        //创建JFrame实例
        JFrame frame = new JFrame("欢迎注册");
        //设置窗体宽高
        frame.setSize(800, 400);
        frame.setLocationRelativeTo(null); //设置窗口居中显示
        //设置窗体禁止调节大小
        frame.setResizable(false);
        //创建面板
        JPanel jPanel = new JPanel();
        jPanel.setLayout(null);

        JLabel label = new JLabel("欢迎来到注册页面!");
        label.setBounds(280, 0, 250, 25);
        label.setFont(new Font("微软雅黑", Font.BOLD, 25));
        label.setForeground(Color.red);
        jPanel.add(label);
        //关闭窗口结束程序
        frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE);
        //显示窗口
        frame.setVisible(true);

        //添加面板
        frame.add(jPanel);
        //设置可见
        frame.setVisible(true);
    }
}