じゃんけんゲームは、対象向けを利用して

      

     ：
    1）    ，         ，     ，        ，     ，     ，     。
    2）        。            。
     ：
   Java    
    ：
    1)    ，  ：  （Player）   ：  （Computer）         
    2)     ：     ，     ，     。       
    3)             ，          。

package FingerGuess;

/**
 * Description:   
 *
 * @Author Fann
 * @Data 2018/12/8
 */
public class Constant {
    public static final int ROCK = 0;//A    
    public static final int SCISSORS = 1;//B    
    public static final int PAPER = 2;//C   
}

package FingerGuess;

import java.util.Random;
import java.util.Scanner;

/**
 * Description:
 *
 * @Author Fann
 * @Data 2018/12/8
 */
public class GuessFingerGame {
    public int score_Player; //    
    public int score_Computer;//    
    Scanner in = new Scanner( System.in );  //       
    Random random = new Random(  );  //           


    //    ,    .
    public void gameStart() throws Exception {
        System.out.println("    :-----------------");
        for (int i = 0; i < 3; i++) {
            System.out.println("   "+i+"   (  0    ,  1    ,  2   ):");
            int player = in.nextInt();

            int computer = random.nextInt(3);  //0-2
            if(computer == Constant.ROCK){
                System.out.println("     :0(  )");
            }else if(computer == Constant.SCISSORS){
                System.out.println("     :1(  )");
            }else{
                System.out.println("     :2( )");
            }


            int result = compare( player,computer );
            //          ,    .
            if(result == 1){ //    ,    
                score_Player++;
            }else if(result == -1){ //    ,    
                score_Computer++;
            }
        }
        //     ,    .
        gameEnd();
    }


    public void showScore(){
        System.out.print("player   :"+score_Player+"     :"+score_Computer);
    }

    /**
     *              
     *    1         0        -1     
     */
    public int compare(int player,int computer) throws Exception {
        //    
        if(player < 0 || player > 2 || computer < 0 || computer > 2){
            throw new Exception( "    " );
        }

        if(player == Constant.ROCK){ //     
            if(computer == Constant.ROCK){
                return 0;  //           .
            }else if(computer == Constant.PAPER){
                return -1;  //    ,     
            }else{
                return 1;
            }
        }

        if(player == Constant.PAPER){ //    
            if(computer == Constant.ROCK){
                return 1;   //     ,     
            }else if(computer == Constant.PAPER){
                return 0;  //     ,    .
            }else{
                return -1;
            }
        }

        if(player == Constant.SCISSORS){ //     
            if(computer == Constant.SCISSORS){
                return 0;  //      ,    .
            }else if(computer == Constant.ROCK){
                return -1;  //     ,  -1.
            }else{
                return 1;
            }
        }
        return 2;
    }


    /**
     *     ,     .
     */
    public void gameEnd(){
        System.out.println("    :-------------");
        if(score_Computer > score_Player){
            System.out.println("  "+score_Computer+" ，  "+score_Player+" ,         ！！");
        }else if(score_Player == score_Computer){
            System.out.println("  "+score_Computer+" ，  "+score_Player+" ,         ！！");
        }else{
            System.out.println("  "+score_Computer+" ，  "+score_Player+" ,         ！！");
        }
    }
}

package FingerGuess;

import java.util.Scanner;

/**
 * Description:
 *
 * @Author Fann
 * @Data 2018/12/8
 */
public class Main {
    public static void main(String[] args) throws Exception {
        //         
        Scanner in = new Scanner( System.in );

        while (true){
            GuessFingerGame game = new GuessFingerGame();
            game.gameStart();
            System.out.println("        y/n?");
            if(in.nextLine().equalsIgnoreCase( "n" )){
                break;
            }
        }
        System.out.println("    ");
    }
}