JAVA打字游戏demo

刚学JAVA，开始不知道写什么，先看的别人写的，原文链接
游戏类

package type_Game;

import java.util.Scanner;

public class Player {
    
    

    private int rank;   // 级别
    private int curScore;   // 分数

    public Player() {
    
    
    }

    public Player(int rank, int curScore) {
    
    
        this.rank = rank;   // 难度等级
        this.curScore = curScore;   // 分数
    }

    public void Score(){
    
    
        int flag = 1;
        String s = "";
        Scanner sc = new Scanner(System.in);
        while (flag == 1 && this.rank < 7){
    
    
//            随等级增加，难度增加
            for (int i = 0; i < this.rank; i++) {
    
    
                s+=(char)(Math.random()*26+'A');    //  获取A-Z
            }
            System.out.println("------请输入与下面相同的字母------");
            System.out.println("------"+s+"-------");
            long startTime = System.currentTimeMillis();    // 获取开始时间
            String letter = sc.next();
            long endTime = System.currentTimeMillis();  //  获取结束时间
//            判断输入的与字母是否相等，相等则加分并增加等级，继续循环
            if(s.equalsIgnoreCase(letter)){
    
    
                this.curScore += 10;
                System.out.println("------输入正确，你当前分数为"+this.curScore+"\n你当前等级为"+this.rank);
                System.out.println("共用"+(endTime-startTime)/1000+"秒");
                this.rank++;
                flag = 1;
                s = "";
                if (this.rank>7){
    
    
                    System.out.println("------你已通关------");
                }
            }
            else if (!s.equals(letter)){
    
    
                System.out.println("------输入错误，游戏结束------");
                flag = 0;
            }
        }

    }
}

用户类

package type_Game;

import java.util.Scanner;

public class User {
    
    
    private String name;
    private String password;

    public User() {
    
    
    }

    public User(String name, String password) {
    
    
        this.name = name;
        this.password = password;
    }

    public void enter(){
    
    
        Scanner sc = new Scanner(System.in);
        System.out.println("------请输入姓名------");
        String name = sc.next();
        System.out.println("------请输入密码------");
        String password = sc.next();
        if(name.equals(this.name) && password.equals(this.password)){
    
    
            System.out.println("------欢迎你"+name+"游戏马上开始------");
        }
        else{
    
    
            System.out.println("姓名密码不对,请重新输入");
            enter();
        }
    }
}

主类

package type_Game;

import java.util.Scanner;

public class Main {
    
    
    public static void main(String[] args) {
    
    
        User us = new User("张三丰", "123123");
        us.enter();
        Player player = new Player(1, 0);
        player.Score();
    }
}