一、棋盘类

 1 package 井字棋游戏;
 2 
 3 public class ChessBoard {
 4     private int number;
 5     Person player = new Person(); // 创建棋手
 6     String[][] board = new String[3][3]; // 创建棋盘
 7     // 设置棋子个数
 8     public void setNumber(int number) {
 9         this.number = number;
10     }
11     // 获得棋子数
12     public int getNumber() {
13         return this.number;
14     }
15     // 打印棋盘 
16     public void printBoard() {
17         for (int i = 0; i < 3; i++) {
18             System.out.println("-------------");
19             for (int j = 0; j < 3; j++) {
20                 if (board[i][j] == null) 
21                     System.out.printf("|   ");
22                 else
23                     System.out.printf("| %s ", board[i][j]);
24             }
25             System.out.println("|");
26         }
27         System.out.println("-------------");
28     }
29     // 判断位置是否合法
30     public boolean judgement(int row, int column) {
31         if (board[row][column] == null)  //该位置无棋子
32             return true;
33         else if (row > 2 || row < 0 || column > 2 || column < 0)  //越界
34             return false;
35         else   //该位置有棋子
36             return false;
37     }
38     // 放置棋子
39     public boolean putChess(String chess) {
40         player.chessPlace(chess);
41     // 若棋子位置合法，则存入数组
42         if (judgement(player.row, player.column)) {
43             board[player.row][player.column] = player.chesspiece;
44             return true;
45         }
46         else {
47             System.out.println("This site has been taken up, please choose another!");
48             return false;
49         }
50     }
51     // 胜利的条件
52     public boolean winCondition() {
53         int i, j;
54         // 判断行
55         for (i = 0; i < 3; i++) {
56             if (board[i][0] == board[i][1] && board[i][1] == board[i][2] && board[i][0] != null) {
57                 System.out.printf("%s player won!
", board[i][0]);
58                 return true;
59             }
60         }
61         //判断列
62         for (j = 0; j < 3; j++) {
63             if (board[0][j] == board[1][j] && board[1][j] == board[2][j] && board[0][j] != null) { 
64                 System.out.printf("%s player won!
", board[0][j]);
65                 return true;
66             }
67         }
68         //判断对角线
69         if (board[0][0] == board[1][1] && board[1][1] == board[2][2] && board[1][1] != null) {
70             System.out.printf("%s player won!
", board[0][0]);
71             return true;
72         }
73         if (board[0][2] == board[1][1] && board[1][1] == board[2][0] && board[1][1] != null) {
74             System.out.printf("%s player won!
", board[0][2]);
75             return true;
76         }
77         return false;
78     }
79 }

二、棋手类

 1 package 井字棋游戏;
 2 
 3 import java.util.Scanner;
 4 public class Person {
 5     Scanner s = new Scanner(System.in);
 6     int row, column;
 7     String chesspiece; // 棋子类型
 8     // 选择棋子
 9     public void chooseChess() {
10         String playerone, playertwo;
11         do {
12             System.out.printf("The first player chooses chess(X or O)：");
13             playerone = s.nextLine();
14         }while(!(playerone.equals("X") || playerone.equals("x") || playerone.equals("O") || playerone.equals("o")));
15         if (playerone.equals("X") || playerone.equals("x")){
16             playertwo = "O";
17             System.out.printf("The first player is %s, the second player is %s
", playerone,playertwo); 
18         }
19         else {
20             playertwo = "X";
21             System.out.printf("The first player is %s, the second player is %s
", playerone,playertwo); 
22         }
23     }
24     // 选择棋子的位置
25     public void chessPlace(String chesspiece) {    
26         do {
27             System.out.printf("Enter a row (1, 2 or 3) for player %s:", chesspiece);
28             row = s.nextInt() - 1;
29             s.nextLine();
30         }while(row < 0 || row > 2);
31         do {
32             System.out.printf("Enter a column (1, 2 or 3) for player %s:", chesspiece);
33             column = s.nextInt() - 1;
34             s.nextLine();
35         }while(column < 0 || column > 2);
36         this.chesspiece = chesspiece;
37     }
38     // 选择是否开始下一局
39     public boolean reStart() {
40         Scanner s = new Scanner(System.in);
41         String flag;
42         System.out.printf("Do you want a new game?(Y or N):");
43         flag = s.nextLine();
44         s.close();
45         if (flag.equals("Y") || flag.equals("y"))
46             return true;
47         else
48             return false;
49     }
50 }

三、测试

package 井字棋游戏;

public class Test {
    public static void main(String[] args) {
        while (true) {
            int i = 0;
            ChessBoard p = new ChessBoard();
            p.player.chooseChess();
            p.printBoard();
            while(!p.winCondition()) {
                if (p.getNumber() % 2 == 0) {
                    boolean judge = p.putChess("X");
                    if (!judge) continue; // 如果位置不合法，则重新下
                }
                else {
                    boolean judge = p.putChess("O");
                    if (!judge) continue; // 如果位置不合法，则重新下
                }
                i++; // 棋子数加一
                p.setNumber(i);  // 设置棋子数
                p.printBoard();
                if(p.getNumber() == 9) {
                    System.out.println("This is a draw!");
                    break;
                }
            }
            if (!p.player.reStart()) {
                System.out.println("Game Over!");
                break;
            }
        }
    }
}

Java井字棋游戏

一、棋盘类

二、棋手类

三、测试

效果如下：