How to write a three-piece chess game in Java

The game operation is as shown in the figure:

Principle:

Mainly relies on the 3x3 two-dimensional array

Achievement:

1. Main–Main Program

public class Main {
    public static void main(String[] args) {
      Player player=new Player();//玩家
      Game game=new Game(player);

      //一次循环代表一次游戏
      while (true){
          game.Init();//初始化
          game.play();//开始游戏

          game.destory();//释放

          boolean q=player.queryContinue();
          //一局游戏结束后，询问用户是否开始下一局游戏
          if (!q){
              System.out.println("欢迎下次继续游戏！");
              break;
          }
      }
    }
}

2.AI–Computer

import java.util.Random;
//返回AI对象的落子位置
//用数组表示 第几行第几列 从0开始
//所以有效范围是[0,2]
public class AI {
    private final Random random=new Random();
    public int[] getPosition(){
        int r=random.nextInt(3);//生成[0,2]的随机整数 0 1 2
        int c=random.nextInt(3);
        return new int[]{r,c};
    }
}

3.Player–Player

import java.util.Scanner;

//返回玩家落子位置
//用数组表示 第几行第几列 从0开始
//所以有效范围是[0,2]
public class Player {
    private final Scanner sc=new Scanner(System.in);

    public int[] getPosition(){
        System.out.println("请输入要落子的位置，行列有效取值范围为[0,2]");
        System.out.print(">>>");
        int r,c;
       while (true){
           System.out.print(">>>");
           r=sc.nextInt();
           c=sc.nextInt();

           if (r>=0&&r<=2&&c>=0&&c<=2){
               break;
           }
           System.out.println("行列有效范围为[0,2],请重新输入");

       }
        return new int[]{r,c};
    }
    //询问用户是否继续下一局
    public boolean queryContinue(){
        System.out.println("本局游戏结束，开始新游戏请输入true，否则输入false");
        System.out.print(">>>");
        return sc.nextBoolean();
    }
}

4. ChessBoard–Chessboard

import java.util.Arrays;

//棋盘 用来实例化对象
//棋盘对象
//功能 1、落子 2、判断棋盘状态
public class ChessBoard {
   private static final int empty=0;//空白位置用0表示
   private static final int circle=1;//落子为o的位置
   private static final int cross=2;//落子为x的位置
   private final int[][] array={
           {empty,empty,empty},
           {empty,empty,empty},
           {empty,empty,empty}
   };

   public boolean moveCircleAt(int row,int column){//落一个o
      if (array[row][column]!=empty){ //落子前需要先判断该位置是否为空白
         return false;
      }
      array[row][column]=circle;
      return true;
   }

   public boolean moveCrossAT(int row,int column){//某个位置落个x
      if (array[row][column]!=empty){
         return false;
      }
      array[row][column]=cross;
      return true;
   }

   //棋盘的四种状态
   public static final int CIRCLE_WIN=0;//执o者赢  //三横三竖两对角成直线
   public static final int CROSS_WIN=1;//执x者赢
   public static final int DRAW=2;//平局 //没有成直线 但无落子位置了
    public static final int CONTINUE=3;//继续

   public int getState(){//得到棋盘的状态
      //判断行
      for (int i=0;i<3;i++){
         if(array[i][0]==array[i][1]&&array[i][1]==array[i][2]){
            if (array[i][0]==circle){
               System.out.println("恭喜你赢了！");
               return CIRCLE_WIN;
            }
            else if (array[i][0]==cross){
               System.out.println("很遗憾你输了！");
               return CROSS_WIN;
            }
         }
      }

      for (int i=0;i<3;i++){
         if (array[0][i]==array[1][i]&&array[1][i]==array[2][i]){
            if (array[0][i]==circle){
               System.out.println("恭喜你赢了！");
               return CIRCLE_WIN;
            }
            else if(array[0][i]==cross){
               System.out.println("很遗憾你输了！");
               return CROSS_WIN;
            }
         }
      }

      //正负对角线
      //正负对角线
      if ((array[0][0]==array[1][1]&&array[1][1]==array[2][2])
              ||(array[0][2]==array[1][1]&&array[1][1]==array[2][0])){
         if (array[1][1]==circle){
            System.out.println("恭喜你赢了！");
            return CIRCLE_WIN;
         }
         else if (array[1][1]==cross){
            System.out.println("很遗憾你输了！");
            return CROSS_WIN;
         }
      }
      //无获胜
      for (int i=0;i<3;i++){
        for (int j=0;j<3;j++){
           if (array[i][j]==empty){
              return CONTINUE;
           }
        }
      }
      return DRAW;//无获胜也无空白 平局
   }

   private static String show(int i){ //显示
      switch (i){
         case empty:
            return " ";
         case circle:
            return "o";
         case cross:
            return "x";
         default:
            return "1";
      }
   }

   @Override
   public String toString() {
      String s="---------\n";
      for (int i=0;i<2;i++){ //前两行
         s+=String.format("|%s|%s|%s|\n",show(array[i][0]),show(array[i][1]),show(array[i][2]));
         s+="---------\n";
      }
      //最后一行
      s+=String.format("|%s|%s|%s|\n",show(array[2][0]),show(array[2][1]),show(array[2][2]));
      s+="---------";

      return s;
   }

   public void reset() {
      for (int i=0;i<3;i++){
         Arrays.fill(array[i],empty);//所有位置再次设置为空白
      }
   }
}

5. Game–Game

import java.util.Arrays;

public class Game {
    private final ChessBoard chessboard;
    private final Player player;
    private final AI ai;

    public Game(Player player){
        this.chessboard=new ChessBoard();
        this.player=player;
        this.ai=new AI();
    }

    //初始化
    public void Init(){
        System.out.println("欢迎进入三子棋游戏");
        System.out.println(chessboard);
    }

    //回合制游戏，游戏主流程
    public void play(){
        while (true){  //一次循环=player回合+AI回合
           if (playerTurn()){//玩家回合
               break;
           }
           if (aiTurn()){//ai回合
               break;
           }
        }
    }

    private boolean aiTurn() {
        System.out.println("AI回合：");
        while (true) {
            int[] rc=ai.getPosition();
            int row=rc[0];
            int column=rc[1];
            if(chessboard.moveCrossAT(row, column)){
                break;
            }
        }
        System.out.println(chessboard);

        return chessboard.getState()!=ChessBoard.CONTINUE;

    }

    private boolean playerTurn() {
        System.out.println("玩家回合：");

        while (true) {
            int[] rc=player.getPosition();
            int row=rc[0];
            int column=rc[1];
            if(chessboard.moveCircleAt(row, column)){
                break;
            }
            System.out.println("该位置已经有棋子，请重新选择位置");
        }
        System.out.println(chessboard);
        return chessboard.getState()!=ChessBoard.CONTINUE;
    }
    //新一局游戏开始时 游戏的界面需要重置 否则会是上一局游戏的结局界面
    public void destory(){
        chessboard.reset();
    }

}

Running results:

1. Test the legality of the position

2. Test the board status/win or loss

3. Test draw

The above is the detailed content of How to write a three-piece chess game in Java. For more information, please follow other related articles on the PHP Chinese website!