剪包锤小游戏（java，命令行）

1. /*  =================== 剪包锤游戏 ========================
2.         功能：
3.     玩家选择玩游戏或者不玩，出“剪子，包子，锤子”中的一个。
4.     程序随机出招，然后判断输赢情况，并打印出来
5.     可以循环玩，直到玩家愿意退出为止。
6.         不足的地方：
7.     异常处理。如果玩家输入错误会得到提示并更正输入，
8.     但如果连续两次错误输入，程序就会结束。
9.     也就是说，异常判断只有一次有效，不清楚原因。。
10. ============================================================*/
12. import java.util.*;
14. // --------------- 主程序 --------------------
15. // --------------------------------------------
16. public class Game_JBC {
17.     public static void main(String[] args) {
18.         Scanner in = new Scanner(System.in);
19.         int i;
21.         //循环开始
22.         do {
23.             System.out.print("开始玩吗？(1.玩 / 2.不玩)：");
24.             i = in.nextInt();
25.             //异常判断
26.             read_data:
27.             if(i!=1 && i!=2) {
28.                 System.out.print("只可以输入“1”或者“2”，请重新输入：");
29.                 i = in.nextInt();
30.                 break read_data;
31.             }
32.             //游戏开始
33.             read_data:
34.             if (i==1) {
35.                 int p;
36.                 System.out.print("出什么呢？(1.剪子 / 2.包子 / 3.锤子)： ");
37.                 p = in.nextInt();
38.                 //异常判断
39.                 if(p!=1 && p!=2 && p!=3){
40.                     System.out.print("只可以输入“1~3”，请重新输入： ");
41.                     p = in.nextInt();
42.                     break read_data;
43.                 }
45.                 JBC game = new JBC(p);
46.                 game.computer_cho();
47.                 System.out.println("你出的是：" + game.player_cho());
48.                 System.out.println("电脑出了：" + game.computer_cho());
49.                 game.decide();
50.                 
51.                 //继续否？
52.                 System.out.println("------------------------------");
53.                 System.out.println("要在玩一次吗~");
54.             }
56.         }while(i==1);
57.         //循环结束，退出游戏
58.         System.out.println("Bye!");
59.     }
60. }
64. // --------------- 类部分 --------------------
65. // --------------------------------------------
66. class JBC {
67.     //构造器
68.     JBC(int p) {
69.         player = p;
70.     }
72.     //得到cmputer的出招
73.     public String computer_cho() {
74.         Random x = new Random();
75.         computer = x.nextInt(3);
76.         //return computer;
77.         switch (computer) {
78.             case 0:
79.                 computer_do = "剪子";
80.                 break;
81.             case 1:
82.                 computer_do = "包子";
83.                 break;
84.             case 2:
85.                 computer_do = "锤子";
86.                 break;
87.         }
88.         return computer_do;
89.     }
91.     //得到玩家的出招
92.     public String player_cho() {
93.         switch (player) {
94.             case 1:
95.                 player_do = "剪子";
96.                 break;
97.             case 2:
98.                 player_do = "包子";
99.                 break;
100.             case 3:
101.                 player_do = "锤子";
102.                 break;
103.         }
104.         return player_do;
105.     }
106.     
107.     //判断输赢
108.     public void decide() {
109.         System.out.print("结果是：");
110.         if (player_do == "包子"){
111.             if (computer_do == "包子")
112.                 System.out.println("平了！");
113.             else if (computer_do == "剪子")
114.                 System.out.println("你输了！");
115.             else
116.                 System.out.println("你赢了！");
117.             }
118.         else if (player_do == "剪子"){
119.             if (computer_do == "包子")
120.                 System.out.println("你赢了！");
121.             else if (computer_do == "剪子")
122.                 System.out.println("平了！");
123.             else
124.                 System.out.println("你输了！");
125.             }
126.         else {
127.             if (computer_do == "包子")
128.                 System.out.println("你输了！");
129.             else if (computer_do == "剪子")
130.                 System.out.println("你赢了！");
131.             else
132.                 System.out.println("平了！");
133.         }
134.     }
135.     
136.     //私有成员
137.     private int player;
138.     private int computer;
139.     private String player_do;
140.     private String computer_do;
141. }