2023.9.18

通过java的自带类写出了登录系统的框架，其中SWing类其中包含了设置框，设置字体以及颜色，还可以设置绝对位置。

package denglujiemian;

import javax.swing.*;
import java.awt.*;
import java.util.ArrayList;
import java.util.Random;

public class denglu {
    public static void main(String[] args) {
        JFrame jFrame = new JFrame("登录");
        //设置窗口大小
        jFrame.setSize(900,507);
        //先将布局管理器置为null
        jFrame.setLayout(null);
        //添加标签【用户名】
        JLabel textUser = new JLabel("用户名:");
        textUser.setForeground(new Color(0xFF0000));
        textUser.setFont(new Font("黑体", Font.PLAIN,30));
        textUser.setBounds(200,140,200,100);
        jFrame.add(textUser);

        //添加输入框【用户名输入框】
        JTextField user = new JTextField(20);
        user.setFont(new Font("黑体", Font.PLAIN,18));
        user.setSelectedTextColor(new Color(0xFF0000));
        user.setBounds(330,170,280,40);
        jFrame.add(user);
        //添加验证码【验证码】
        String Str=y2();
        JLabel yzm=new JLabel(Str+" :");
        yzm.setForeground(new Color(0xFF0000));
        yzm.setFont(new Font("黑体",Font.PLAIN,30));
        yzm.setBounds(200,250,200,100);
        jFrame.add(yzm);
        //添加验证码输入框【输入框】
        JTextField kuang = new JTextField(20);
        kuang.setFont(new Font("黑体", Font.PLAIN,18));
        kuang.setSelectedTextColor(new Color(0xFF0000));
        kuang.setBounds(330,280,280,40);
        jFrame.add(kuang);

        //添加标签【密码】
        JLabel textPassword = new JLabel("密码  :");
        textPassword.setForeground(new Color(0xFF0000));
        textPassword.setFont(new Font("黑体", Font.PLAIN,30));
        textPassword.setBounds(200,200,200,100);
        jFrame.add(textPassword);

        //添加密码输入框【密码】
        JPasswordField password = new JPasswordField(20);
        password.setBounds(330,230,280,40);
        jFrame.add(password);

        //添加按钮【登录】
        JButton jButton = new JButton("登录");
        jButton.setForeground(new Color(0x023BF6));
        jButton.setBackground(new Color(0x38FF00));
        jButton.setFont(new Font("黑体", Font.PLAIN,20));
        jButton.setBorderPainted(false);
        jButton.setBounds(300,330,100,50);
        jFrame.add(jButton);

        //添加按钮【注册】
        JButton register = new JButton("注册");
        register.setForeground(new Color(0x0029FF));
        register.setBackground(new Color(0xECA871));
        register.setFont(new Font("黑体", Font.PLAIN,20));
        register.setBorderPainted(false);
        register.setBounds(500,330,100,50);
        jFrame.add(register);

        jFrame.setVisible(true);

    }
    public static String y2(){
        ArrayList list=new ArrayList<>();
        for(int i=0;i<26;i++){
            list.add((char)('a'+i));
            list.add((char)('A'+i));
        }
        String yanzheng="";
        Random random=new Random();
        for(int i=0;i<5;i++){
            int w=random.nextInt(list.size());
            char c=(char)list.get(w);
            yanzheng=yanzheng+c;
        }
        return yanzheng;
    }
}