switch部分我换用if总会出错，请那位大神帮我一下，谢谢

import java.util.Scanner;
public class Teste{
    public static void main(String[] args){
        Scanner in=new Scanner(System.in);
        System.out.println("————猜拳游戏————");
        System.out.println("请出拳：(1、剪刀 2、石头 3、布)");
        int people=in.nextInt();
        int computer=(int)(Math.random()*3)+1;
        String Marks="拳头";//这是给人做标记的;
        String Marks2="拳头";//这是给电脑做标记的；
        switch(people){
            case 1:
            Marks="剪刀";
            break;
            case 2:
            Marks="石头";
            break;
            case 3:
            Marks="布";
            break;
        }
        switch(computer){
            case 1:
            Marks2="剪刀";
            break;
            case 2:
            Marks2="石头";
            break;
            case 3:
            Marks2="布";
            break;
        }
        System.out.println(computer);
        /************start**************/
         int result = 0;
        if(Math.abs(people-computer)== 2){
        result = -(people-computer);
        }else{
          result = people-computer;
        }
        if(result == 0){
        System.out.println("平局你出的的是："+Marks+"电脑出的是："+Marks2);
        }
        if(result > 0){
        System.out.println("你赢了你出的是："+Marks+"电脑出的是："+Marks2);
        }
        if(result < 0){
        System.out.println("你输了你出的是："+Marks+"电脑出的是："+Marks2);
        }
        /************end***********/
        if(people==computer){
            System.out.println("平局你出的的是："+Marks+"电脑出的是："+Marks2);
        }else if(people==1&&computer==2||people==2&&computer==3||people==3&&computer==1){
            System.out.println("你输了你出的是："+Marks+"电脑出的是："+Marks2);
        }else{
            System.out.println("你赢了你出的是："+Marks+"电脑出的是："+Marks2);
        }
    }
}//你看看有没有对你有帮助

//不好意思瞎扯了，悲剧啊，你写个函数就可以了，你看看
import java.util.Scanner;
public class Teste{
    public String result(int num){
        if(num == 1){
            return "剪刀";
        }
        if(num == 2){
            return "石头";
        }
        if(num == 3){
            return "布";
        }
        return "未知";
       }
    public static void main(String[] args){
        Scanner in=new Scanner(System.in);
        System.out.println("————猜拳游戏————");
        System.out.println("请出拳：(1、剪刀 2、石头 3、布)");
        int people=in.nextInt();
        int computer=(int)(Math.random()*3)+1;
//        String Marks="拳头";//这是给人做标记的;
//        String Marks2="拳头";//这是给电脑做标记的；
//        switch(people){
//            case 1:
//            Marks="剪刀";
//            break;
//            case 2:
//            Marks="石头";
//            break;
//            case 3:
//            Marks="布";
//            break;
//        }
//        switch(computer){
//            case 1:
//            Marks2="剪刀";
//            break;
//            case 2:
//            Marks2="石头";
//            break;
//            case 3:
//            Marks2="布";
//            break;
//        }
        Teste test = new Teste();
        System.out.println(computer);
         int result = 0;
        if(Math.abs(people-computer)== 2){
        result = -(people-computer);
        }else{
          result = people-computer;
        }
        if(result == 0){
        System.out.println("平局你出的的是："+test.result(people)+"电脑出的是："+test.result(computer));
        }
        if(result > 0){
        System.out.println("你赢了你出的是："+test.result(people)+"电脑出的是："+test.result(computer));
        }
        if(result < 0){
        System.out.println("你输了你出的是："+test.result(people)+"电脑出的是："+test.result(computer));
        }
        if(people==computer){
            System.out.println("平局你出的的是："+test.result(people)+"电脑出的是："+test.result(computer));
        }else if(people==1&&computer==2||people==2&&computer==3||people==3&&computer==1){
            System.out.println("你输了你出的是："+test.result(people)+"电脑出的是："+test.result(computer));
        }else{
            System.out.println("你赢了你出的是："+test.result(people)+"电脑出的是："+test.result(computer));
        }
    }
}

谢谢了，不多说了，我得回去好好研究研究