Java井字棋游戏

试着写了一个井字棋游戏，希望各位能给予一些宝贵的建议。

一、棋盘类

package 井字棋游戏;

public class ChessBoard {
    private int number;
    Person player = new Person(); // 创建棋手
    String[][] board = new String[3][3]; // 创建棋盘
    // 设置棋子个数
    public void setNumber(int number) {
        this.number = number;
    }
    // 获得棋子数
    public int getNumber() {
        return this.number;
    }
    // 打印棋盘 
    public void printBoard() {
        for (int i = 0; i < 3; i++) {
            System.out.println("-------------");
            for (int j = 0; j < 3; j++) {
                if (board[i][j] == null) 
                    System.out.printf("|   ");
                else
                    System.out.printf("| %s ", board[i][j]);
            }
            System.out.println("|");
        }
        System.out.println("-------------");
    }
    // 判断位置是否合法
    public boolean judgement(int row, int column) {
        if (board[row][column] == null)  //该位置无棋子
            return true;
        else if (row > 2 || row < 0 || column > 2 || column < 0)  //越界
            return false;
        else   //该位置有棋子
            return false;
    }
    // 放置棋子
    public boolean putChess(String chess) {
        player.chessPlace(chess);
    // 若棋子位置合法，则存入数组
        if (judgement(player.row, player.column)) {
            board[player.row][player.column] = player.chesspiece;
            return true;
        }
        else {
            System.out.println("This site has been taken up, please choose another!");
            return false;
        }
    }
    // 胜利的条件
    public boolean winCondition() {
        int i, j;
        // 判断行
        for (i = 0; i < 3; i++) {
            if (board[i][0] == board[i][1] && board[i][1] == board[i][2] && board[i][0] != null) {
                System.out.printf("%s player won!
", board[i][0]);
                return true;
            }
        }
        //判断列
        for (j = 0; j < 3; j++) {
            if (board[0][j] == board[1][j] && board[1][j] == board[2][j] && board[0][j] != null) { 
                System.out.printf("%s player won!
", board[0][j]);
                return true;
            }
        }
        //判断对角线
        if (board[0][0] == board[1][1] && board[1][1] == board[2][2] && board[1][1] != null) {
            System.out.printf("%s player won!
", board[0][0]);
            return true;
        }
        if (board[0][2] == board[1][1] && board[1][1] == board[2][0] && board[1][1] != null) {
            System.out.printf("%s player won!
", board[0][2]);
            return true;
        }
        return false;
    }
}

二、棋手类

package 井字棋游戏;

import java.util.Scanner;
public class Person {
    Scanner s = new Scanner(System.in);
    int row, column;
    String chesspiece; // 棋子类型
    // 选择棋子
    public void chooseChess() {
        String playerone, playertwo;
        do {
            System.out.printf("The first player chooses chess(X or O)：");
            playerone = s.nextLine();
        }while(!(playerone.equals("X") || playerone.equals("x") || playerone.equals("O") || playerone.equals("o")));
        if (playerone.equals("X") || playerone.equals("x")){
            playertwo = "O";
            System.out.printf("The first player is %s, the second player is %s
", playerone,playertwo); 
        }
        else {
            playertwo = "X";
            System.out.printf("The first player is %s, the second player is %s
", playerone,playertwo); 
        }
    }
    // 选择棋子的位置
    public void chessPlace(String chesspiece) {    
        do {
            System.out.printf("Enter a row (1, 2 or 3) for player %s:", chesspiece);
            row = s.nextInt() - 1;
            s.nextLine();
        }while(row < 0 || row > 2);
        do {
            System.out.printf("Enter a column (1, 2 or 3) for player %s:", chesspiece);
            column = s.nextInt() - 1;
            s.nextLine();
        }while(column < 0 || column > 2);
        this.chesspiece = chesspiece;
    }
    // 选择是否开始下一局
    public boolean reStart() {
        Scanner s = new Scanner(System.in);
        String flag;
        System.out.printf("Do you want a new game?(Y or N):");
        flag = s.nextLine();
        s.close();
        if (flag.equals("Y") || flag.equals("y"))
            return true;
        else
            return false;
    }
}

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;
            }
        }
    }
}

效果如下：