* 简易五子棋代码锻炼

import java.util.Arrays;
import java.util.Scanner;

/**

• 简易五子棋

*/
public class Gobang {

public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    boolean finish = false; // 游戏是否结束
    int turn = 1; // 当前下棋者标记,1则PLAYER1下棋，-1则PLAYER2下棋
    int x = 0, y = 0; // 当前棋子的横纵坐标
    final char PLAYER1 = '*';// 玩家1使用的字符
    final char PLAYER2 = 'o';// 玩家2使用的字符
    final char EMPTY = '-';// 空棋盘使用的字符

    /* 棋盘初始化 */
    char checkerboard[][] = new char[10][10];
    for (int i = 0; i < checkerboard.length; i++) {
        Arrays.fill(checkerboard[i], EMPTY);
    }

    game : while (!finish) {
        /* 打印棋盘 */
        System.out.println("---------------------");
        System.out.println("  0 1 2 3 4 5 6 7 8 9");
        for (int i = 0; i < checkerboard.length; i++) {
            System.out.print(i + " ");
            for (int j = 0; j < checkerboard[i].length; j++) {
                System.out.print(checkerboard[i][j] + " ");
            }
            System.out.println();
        }
        System.out.println("---------------------");

        /* 判断当前下棋者 */
        if (turn == 1) {
            System.out.println("请" + PLAYER1 + "输入棋子坐标：");
        } else {
            System.out.println("请" + PLAYER2 + "输入棋子坐标：");
        }

        /* 输入棋子坐标 */
        String str = sc.nextLine();

        x = Integer.parseInt(String.valueOf(str.charAt(0)));
        y = Integer.parseInt(String.valueOf(str.charAt(1)));

        /* 判断坐标是否在棋盘之内 */
        if (x < 0 || x > 8 || y < 0 || y > 8) {
            System.out.println("***您输入的坐标有误请重新输入！***");
            continue;
        }

        /* 判断坐标上是否有棋子 */
        if (checkerboard[x][y] == EMPTY) {
            if (turn == 1) {
                checkerboard[x][y] = PLAYER1;
            } else {
                checkerboard[x][y] = PLAYER2;
            }
        } else {
            System.out.println("***您输入位置已经有其他棋子，请重新选择！***");
            continue;
        }

        /* 五子棋输赢算法那*/
        for (int i = 0; i < checkerboard.length; i++) {
            for (int j = 0; j < checkerboard[i].length; j++) {
                char flagch = checkerboard[i][j];
                if (flagch == EMPTY) {// 如果此处没有棋子
                    continue;// 不进行输赢判断
                }
                /* 判断棋子左侧 */
                if (y - 4 >= 0) {
                    if (checkerboard[i][j - 1] == flagch
                            && checkerboard[i][j - 2] == flagch
                            && checkerboard[i][j - 3] == flagch
                            && checkerboard[i][j - 4] == flagch) {
                        finish = true;
                        break game;
                    }
                }

                /* 判断棋子右侧 */
                if (y + 4 <= 9) {
                    if (checkerboard[i][j + 1] == flagch
                            && checkerboard[i][j + 2] == flagch
                            && checkerboard[i][j + 3] == flagch
                            && checkerboard[i][j + 4] == flagch) {
                        finish = true;
                        break game;
                    }
                }
                /* 判断棋子上方 */
                if (x - 4 >= 0) {
                    if (checkerboard[i - 1][j] == flagch
                            && checkerboard[i - 2][j] == flagch
                            && checkerboard[i - 3][j] == flagch
                            && checkerboard[i - 4][j] == flagch) {
                        finish = true;
                        break game;
                    }
                }
                /* 判断棋子下方 */
                if (x + 4 <= 9) {
                    if (checkerboard[i + 1][j] == flagch
                            && checkerboard[i + 2][j] == flagch
                            && checkerboard[i + 3][j] == flagch
                            && checkerboard[i + 4][j] == flagch) {
                        finish = true;
                        break game;
                    }
                }
                /* 判断棋子西北 */
                if (x - 4 >= 0 && y - 4 >= 0) {
                    if (checkerboard[i - 1][j - 1] == flagch
                            && checkerboard[i - 2][j - 2] == flagch
                            && checkerboard[i - 3][j - 3] == flagch
                            && checkerboard[i - 4][j - 4] == flagch) {
                        finish = true;
                        break game;
                    }
                }
                /* 判断棋子西南 */
                if (x + 4 <= 9 && y - 4 >= 0) {
                    if (checkerboard[i + 1][j - 1] == flagch
                            && checkerboard[i + 2][j - 2] == flagch
                            && checkerboard[i + 3][j - 3] == flagch
                            && checkerboard[i + 4][j - 4] == flagch) {
                        finish = true;
                        break game;
                    }
                }
                /* 判断棋子东北 */
                if (x - 4 >= 0 && y + 4 <= 9) {
                    if (checkerboard[i - 1][j + 1] == flagch
                            && checkerboard[i - 2][j + 2] == flagch
                            && checkerboard[i - 3][j + 3] == flagch
                            && checkerboard[i - 4][j + 4] == flagch) {
                        finish = true;
                        break game;
                    }
                }
                /* 判断棋子东南 */
                if (x + 4 <= 9 && y + 4 <= 9) {
                    if (checkerboard[i + 1][j + 1] == flagch
                            && checkerboard[i + 2][j + 2] == flagch
                            && checkerboard[i + 3][j + 3] == flagch
                            && checkerboard[i + 4][j + 4] == flagch) {
                        finish = true;
                        break game;
                    }
                }
            }
        }
        turn *= -1; // 更换下棋者标记
    }

    /* 输出最后胜利的棋盘 */
    System.out.println("---------------------");
    System.out.println("  0 1 2 3 4 5 6 7 8 9");
    for (int i = 0; i < checkerboard.length; i++) {
        System.out.print(i + " ");
        for (int j = 0; j < checkerboard[i].length; j++) {
            System.out.print(checkerboard[i][j] + " ");
        }
        System.out.println();
    }
    System.out.println("---------------------");
    /* 输出赢家 */
    if (turn == 1) {
        System.out.println("*棋胜利！");
    } else {
        System.out.println("o棋胜利！");
    }
    sc.close();
}

}