java - 必须为2个玩家编写井字游戏

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import java.util.Scanner;

public class gameBoard
{

public static void main(String[] args)
{
    String str1;
    Scanner scan =  new Scanner(System.in);
    System.out.println("Player 1 please enter 1 or 2, 1 = O, 2 = X");
    int a = scan.nextInt();
    if(a == 1){
        String str2 = "O";
        str1 = str2;
    }else{
        String str2 = "X";
        str1 = str2;
    }
    System.out.println("Player 1 please enter the ROW (1, 2 or 3) you want: ");
    int b = scan.nextInt();
    if (b == 1 || b == 2 || b == 3){
        System.out.println("Player 1 please enter the COLUMN you want: ");
        int c = scan.nextInt();
        if( c == 1 || c == 2 || c == 3){
            if ( b == 2 && c == 2){
                System.out.println("   |   |   ");
                System.out.println("-----------");
                System.out.println("   | " + str1 + " |   ");
                System.out.println("-----------");
                System.out.println("   |   |   ");
            }
            if (b == 1 && c == 1){
                System.out.println(str1 + " |   |   ");
                System.out.println("-----------");
                System.out.println("  |   |   ");
                System.out.println("-----------");
                System.out.println("  |   |   ");
            }
            if (b == 2 && c == 1){
                System.out.println("   |   |   ");
                System.out.println("-----------");
                System.out.println(str1 + "  |   |   ");
                System.out.println("-----------");
                System.out.println("   |   |   ");
            }
            if (b == 3 && c == 1){
                System.out.println("   |   |   ");
                System.out.println("-----------");
                System.out.println("   |  |   ");
                System.out.println("-----------");
                System.out.println(str1 + "   |   |   ");
            }
            if (b == 1 && c == 2){
                System.out.println("   | " +str1 +  " |   ");
                System.out.println("-----------");
                System.out.println("   |   |   ");
                System.out.println("-----------");
                System.out.println("   |   |   ");
            }
            if( b == 3 && c == 2){
                System.out.println("   |   |   ");
                System.out.println("-----------");
                System.out.println("   |  |   ");
                System.out.println("-----------");
                System.out.println("   | " + str1 + "|   ");
            }
            if (b == 1 && c == 3){
                System.out.println("   |   |" + str1);
                System.out.println("-----------");
                System.out.println("   |  |   ");
                System.out.println("-----------");
                System.out.println("   |   |   ");
            }
            if (b == 2 && c == 3){
                System.out.println("   |   |   ");
                System.out.println("-----------");
                System.out.println("   |  | " + str1);
                System.out.println("-----------");
                System.out.println("   |   |   ");
            }
            if ( b == 3 && c == 3){
                System.out.println("   |   |   ");
                System.out.println("-----------");
                System.out.println("   |   |   ");
                System.out.println("-----------");
                System.out.println("   |   | " + str1);
            }
            System.out.println("Player 2 please enter 1 or 2, 1 = O, 2 = X");
            int e = scan.nextInt();
            if(e == 1){
                String str2 = "O";
                str1 = str2;
            }else{
                String str2 = "X";
                str1 = str2;
        }
        System.out.println("Player 2 please enter the ROW (1, 2 or 3) you want: ");
        int f = scan.nextInt();
        if (f == 1 || f == 2 || f == 3){
            System.out.println("Player 2 please enter the COLUMN you want: ");
            int g = scan.nextInt();
            if( g == 1 || g == 2 || g == 3){
                if ( f == 2 && g == 2){
                    System.out.println("   |   |   ");
                    System.out.println("-----------");
                    System.out.println("   | " + str1 + " |   ");
                    System.out.println("-----------");
                    System.out.println("   |   |   ");
                }
                if (f == 1 && g == 1){
                    System.out.println(str1 + " |   |   ");
                    System.out.println("-----------");
                    System.out.println("  |   |   ");
                    System.out.println("-----------");
                    System.out.println("  |   |   ");
                }
                if (f == 2 && g == 1){
                    System.out.println("   |   |   ");
                    System.out.println("-----------");
                    System.out.println(str1 + "  |   |   ");
                    System.out.println("-----------");
                    System.out.println("   |   |   ");
                }
                if (f == 3 && g == 1){
                    System.out.println("   |   |   ");
                    System.out.println("-----------");
                    System.out.println("   |  |   ");
                    System.out.println("-----------");
                    System.out.println(str1 + "   |   |   ");
                }
                if (f == 1 && g == 2){
                    System.out.println("   | " +str1 +  " |   ");
                    System.out.println("-----------");
                    System.out.println("   |   |   ");
                    System.out.println("-----------");
                    System.out.println("   |   |   ");
                }
                if( f == 3 && g == 2){
                    System.out.println("   |   |   ");
                    System.out.println("-----------");
                    System.out.println("   |  |   ");
                    System.out.println("-----------");
                    System.out.println("   | " + str1 + "|   ");
                }
                if (f == 1 && g == 3){
                    System.out.println("   |   |" + str1);
                    System.out.println("-----------");
                    System.out.println("   |  |   ");
                    System.out.println("-----------");
                    System.out.println("   |   |   ");
                }
                if (f == 2 && g == 3){
                    System.out.println("   |   |   ");
                    System.out.println("-----------");
                    System.out.println("   |  | " + str1);
                    System.out.println("-----------");
                    System.out.println("   |   |   ");
                }
                if ( f == 3 && g == 3){
                    System.out.println("   |   |   ");
                    System.out.println("-----------");
                    System.out.println("   |   |   ");
                    System.out.println("-----------");
                    System.out.println("   |   | " + str1);
                }
                System.out.println("");
            }

    }



}

}
}
}

我现在完全用if语句来编写此东西，我觉得这是解决此任务的一种内在错误的方法。我可以得到每个玩家的第一个举动，但是我想不出一种方法来“保存”第一个玩家移动后棋盘的状态，它只是打印出玩家1的第一个举动的棋盘，然后打印玩家2的第一个棋盘。第一步，但它们不在同一块板上。我在这里感觉有点不合时宜...

最佳答案

您应该更倾向于使用字段（用于“保存”）和方法（用于重复使用代码位）

试试这个例子：

import java.util.Scanner;

public class GameBoard {
    // Use a matrix to emulate a 3*3 grid.
    private String[][] board = new String[3][3];
    private String[][] players = { { "Player 1", "X" }, { "Player 2", "O" } };
    private int currentPlayer = -1;

    public boolean isBoardFull() {
        for (String[] row : board) {
            for (String col : row) {
                if (col == null) {
                    return false;
                }
            }
        }

        return true;
    }

    public boolean gameIsWon() {
        // I shall leave this to your imagination ;)
        return false;
    }

    public void printBoard() {
        for (String[] row : board) {
            for (String col : row) {
                System.out.print("|" + (col == null ? " " : col) + "|");
            }

            System.out.println("\n---------");
        }
    }

    public void play() {
        // Try-with-resource (Java 7+)

        try (Scanner scanner = new Scanner(System.in)) {
            while (!isBoardFull()) {
                currentPlayer = (currentPlayer + 1) % 2;

                boolean valid = false;

                // Loop until a certain player makes a valid move
                while (!valid) {
                    System.out.print(players[currentPlayer][0] + ", choose your row: \n> ");
                    int row = scanner.nextInt() - 1;

                    System.out.print(players[currentPlayer][0] + ", you have chosen row " + (row + 1) + ". Choose your column: \n> ");
                    int col = scanner.nextInt() - 1;

                    if (board[row][col] == null) {
                        board[row][col] = players[currentPlayer][1];

                        printBoard();

                        if (gameIsWon()) {
                            System.out.println(players[currentPlayer][0] + " wins!");

                            return;
                        }

                        valid = true; // This will allow players to switch turns
                    } else {
                        System.out.println("This slot is taken, try again!");
                    }
                }
            }

            System.out.println("Draw!");
        }
    }

    public static void main(String[] args) {
        new GameBoard().play();
    }
}

关于java - 必须为2个玩家编写井字游戏，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/23274163/