人机猜拳

1.选取对战角色

　　选择猜拳的对手

2.猜拳

　　开始对战,用户选择出拳,与对手进行比较,提示胜负信息

3.记录分数

　　每局猜拳结束,获胜一方加1分(平局都不加分),结束游戏时,显示对战次数及对战最终结果

创建类方法

import java.util.Scanner;

public class Cai {
    int se1;
    int se2;
    String choice1;
    String choice2;
    String choiceMan;
    boolean a1;
    boolean a2;
    int random = (int) (Math.random() * 3);

    public void A() {
        Scanner input = new Scanner(System.in);
        do {
            System.out.print("
请出拳：1.剪刀 2.石头 3.布（输入相应数字）：");
            se1 = input.nextInt();
            a1 = false;
            switch (se1) {
            case 1:
                choice1 = "剪子";
                break;
            case 2:
                choice1 = "石头";
                break;
            case 3:
                choice1 = "布";
                break;
            default:
                System.out.println("请做出正确选择!");
                a1 = true;
                break;
            }
        } while (a1 == true);
    }

    public void B() {
        if (random == 0.0) {
            random = 3;
        }
        switch (random) {
        case 1:
            choice2 = "剪子";
            break;
        case 2:
            choice2 = "石头";
            break;
        case 3:
            choice2 = "布";
            break;
        }
    }

    public void C() {
        Scanner input = new Scanner(System.in);
        do {
            System.out.print("请选择对方的角色（1.刘备 2.孙权 3.曹操）:");
            se2 = input.nextInt();
            a2 = false;
            switch (se2) {
            case 1:
                choiceMan = "刘备";
                break;
            case 2:
                choiceMan = "孙权";
                break;
            case 3:
                choiceMan = "曹操";
                break;
            default:
                System.out.println("请做出正确选择!");
                a2 = true;
                break;
            }
        } while (a2 == true);
    }

    public void D() {
        System.out.println("--------------------欢迎进入游戏世界------------------");
        System.out.println("

");
        System.out.println("		***************");
        System.out.println("		**c猜拳，开始**");
        System.out.println("		***************");
        System.out.println("

");
        System.out.println("出拳规则：1.剪刀	2.石头	3.布");
    }
}

使用main方法执行

import java.util.Scanner;

public class Cai01 {
    public static void main(String[] args) {
        Cai cen = new Cai();
        Scanner input = new Scanner(System.in);
        String choice = null;
        int bot = 0;
        cen.D();
        cen.C();
        System.out.println("你选择了" + cen.choiceMan + "对战
");
        System.out.print("要开始吗？（开始按y）");
        do {
            choice = input.next();
            if (choice.equals("y")) {
                cen.A();
                System.out.println("你出拳：" + cen.choice1);
                cen.B();
                System.out.println(cen.choiceMan + "出拳：" + cen.choice2);
                System.out.print("结果说：");
                if (cen.se1 == cen.random) {
                    System.out.println("和局，真衰！嘿嘿，等着瞧吧！
");
                } else if ((cen.se1 == 1 && cen.random == 3)
                        || (cen.se1 == 2 && cen.random == 1)
                        || (cen.se1 == 3 && cen.random == 2)) {
                    System.out.println("恭喜，你赢了！
");
                } else {
                    System.out.println("^_^,你输了，真笨！
");
                }
                System.out.print("是否开始下一轮？（开始按y）：");
                bot++;
            } else {
                break;
            }
        } while (choice.equals("y"));
        System.out.println("-------------------------");
        System.out.println(cen.choiceMan + " VS " + "匿名");
        System.out.println("对战次数：" + bot);
        System.out.println("结果：呵呵，笨笨，下次加油啊！");
        System.out.println("-------------------------");
    }
}