Java 控制台五子棋游戏

Java 控制台五子棋游戏

• 思路
• 效果
• 代码

思路

这是疯狂java第四章习题：
难点：

• 如何遍历左斜线和右斜线的棋子
• 怎么判断5个棋子连在一起了
  这里通过设置两个计数器（countBlack和countWhite）遇到黑子countBlack加1，清零countWhite，如果countBlack=5退出计数，黑子胜利。遇到白子countWhite加1，清零countBlack，如果countWhite=5退出计数，白子胜利。

---

效果

代码

package FourPointSeven;

import javax.xml.namespace.QName;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.math.BigDecimal;

public class Gobang {
    //定义棋盘的大小
    private static int BOARD_SIZE = 15;
    private static int countBlack = 0;
    private static int countWhite = 0;
    private static Gobang gobang;
    //定义一个二维数组来充当棋盘
    private String[][] board;
    public void initBoard(){
        board = new String[BOARD_SIZE][BOARD_SIZE];
        for (var i= 0; i < BOARD_SIZE; i++){
            for (var j = 0; j < BOARD_SIZE; j++){
                board[i][j]="┼";
            }
        }
    }

    public void printBoard(){
        for (var i= 0; i < BOARD_SIZE; i++){
            for (var j = 0; j < BOARD_SIZE; j++){
                System.out.print(board[i][j]);
            }
            System.out.print('
');
        }
    }

    public static void main(String[] args) throws Exception{
        String[] posStrArr = new String[1];
        int xPos=0,yPos=0;
        gobang = new Gobang();
        gobang.initBoard();
        gobang.printBoard();
        //键盘输入
        var br = new BufferedReader(new InputStreamReader(System.in));
        String inputStr = null;
        while (true){
            System.out.println("请输入您的下棋坐标，应以x y的格式");
            inputStr = br.readLine();
            if (inputStr.equals("q")){
                break;
            }
            try{
                posStrArr = inputStr.split(" ");
                //把字符串转换成用户下棋坐标
                xPos = Integer.parseInt(posStrArr[0]);
                yPos = Integer.parseInt(posStrArr[1]);
                if (xPos<=0||yPos<=0||xPos>15||yPos>15){
                    throw new Exception("输入的坐标超出范围");
                }
                //把对应数组元素赋为“⚫”
                while (true){
                    if (gobang.board[xPos - 1][yPos - 1].equals("┼")){
                        gobang.board[xPos - 1][yPos - 1] = "●";
                        break;
                    }else {
                        System.out.println("这里已经有棋子了，请重新输入：");
                        inputStr = br.readLine();
                        posStrArr = inputStr.split(" ");
                        xPos = Integer.parseInt(posStrArr[0]);
                        yPos = Integer.parseInt(posStrArr[1]);
                    }
                }
                //电脑下棋
                while (true){
                    var cxPos = (int)(Math.random()*BOARD_SIZE);//生成一个1~15的整数
                    var cyPos = (int)(Math.random()*BOARD_SIZE);
                    if (gobang.board[cxPos][cyPos].equals("┼")){
                        gobang.board[cxPos][cyPos] = "○";
                        break;
                    }
                }
                gobang.printBoard();
            }catch (Exception e){
                System.out.println("您输入的格式有误！请重新输入！");
            }
            //扫描判断谁赢了
            //按每一行扫描
            for (var i = 0; i < BOARD_SIZE;i++) {
                for (var j = 0; j < BOARD_SIZE; j++){
                    if (gobang.board[i][j].equals("●")){
                        if (blackAdd())break;
                    }else if (gobang.board[i][j].equals("○")){
                        if(whiteAdd())break;
                    }
                }
                if (isVictory()==1||isVictory()==2){
                    break;
                }
            }
            //按列扫描
            for (var j = 0; j < BOARD_SIZE;j++) {
                for (var i = 0; i < BOARD_SIZE; i++) {
                    if (gobang.board[i][j].equals("●")) {
                        if (blackAdd())break;
                    } else if (gobang.board[i][j].equals("○")) {
                        if(whiteAdd())break;
                    }
                }
                if (isVictory()==1 || isVictory()==2){
                    break;
                }
            }
            //按 “/”扫描
            for (var i = 0; i < BOARD_SIZE;i++){
                for (var j = 0;j <= i;j++){
                   if (gobang.board[j][i-j].equals("●")){
                       if (blackAdd())break;
                   }else if (gobang.board[j][i-j].equals("○")){
                       if(whiteAdd())break;
                   }
                }
                if (isVictory()==1||isVictory()==2){
                    break;
                }
            }
            for (var i = 0; i < BOARD_SIZE; i++){
                for (var j =0 ;j <=i ;j++){
                    if (gobang.board[14-i+j][14-j].equals("●")){
                        if (blackAdd())break;
                    }else if (gobang.board[14+j-i][14-j].equals("○")){
                        if(whiteAdd())break;
                    }
                }
                if (isVictory()==1||isVictory()==2){
                    break;
                }
            }
            //按“”扫描
            for (var i = 0; i < BOARD_SIZE;i++){
                for (var j = 0; j <= i;j++){
                    if (gobang.board[14-i+j][j].equals("●")){
                        if (blackAdd())break;
                    }else if (gobang.board[14-i+j][j].equals("○")){
                        if(whiteAdd())break;
                    }
                }
                if (isVictory()==1||isVictory()==2){
                    break;
                }
            }
            for (var i = 0; i < BOARD_SIZE; i++){
                for (var j = 0; j <= i; j++){
                    if (gobang.board[j][14-i+j].equals("●")){
                        if (blackAdd())break;
                    }else if (gobang.board[j][14-i+j].equals("○")){
                        if(whiteAdd())break;
                    }
                }
                if (isVictory()==1||isVictory()==2){
                    break;
                }
            }
        }
    }

    private static int isVictory(){
        if (countBlack == 5 ){
            System.out.println("黑子胜利！！！劈里啪啦！");
            //重新初始化棋盘
            gobang.initBoard();
            gobang.printBoard();
            emptyCount();
            return 1;
        }else if (countWhite ==5){
            System.out.println("白子胜利！！！劈里啪啦！");
            //重新初始化棋盘
            gobang.initBoard();
            gobang.printBoard();
            emptyCount();
            return 2;
        } else {
            emptyCount();
        }
        return -1;
    }
    private static void emptyCount(){
        countBlack = 0;
        countWhite = 0;
    }

    private static boolean blackAdd(){
        countBlack++;
        if (countBlack == 5){
            return true;
        }else {
            countWhite = 0;
        }
        return false;
    }

    private static boolean whiteAdd(){
        countWhite++;
        if (countWhite == 5)
        {
            return true;
        }else {
            countBlack = 0;
        }
        return false;
    }
}