使用Java编写一个数独游戏

好的，我可以为您提供一个简单的Java数独游戏代码示例：

import java.util.Scanner;

public class SudokuGame {
    private int[][] board;
    private static final int BOARD_SIZE = 9;
    private static final int BOX_SIZE = 3;

    public SudokuGame() {
        board = new int[BOARD_SIZE][BOARD_SIZE];
    }

    public void startGame() {
        Scanner scanner = new Scanner(System.in);
        System.out.println("Welcome to Sudoku Game!");
        System.out.println("Please enter the numbers for each row, use 0 for empty cells.");
        System.out.println("Example for row 1: 530070000 (means 5 3 0 0 7 0 0 0 0)");
        for (int i = 0; i < BOARD_SIZE; i++) {
            System.out.printf("Enter row %d: ", i + 1);
            String input = scanner.nextLine();
            while (!validateInput(input)) {
                System.out.println("Invalid input, please enter again.");
                System.out.printf("Enter row %d: ", i + 1);
                input = scanner.nextLine();
            }
            for (int j = 0; j < BOARD_SIZE; j++) {
                board[i][j] = Character.getNumericValue(input.charAt(j));
            }
        }
        System.out.println("Game starts now!");
        printBoard();
        while (!isBoardCompleted()) {
            System.out.print("Enter row: ");
            int row = scanner.nextInt();
            System.out.print("Enter column: ");
            int column = scanner.nextInt();
            System.out.print("Enter number: ");
            int number = scanner.nextInt();
            while (!isValidMove(row - 1, column - 1, number)) {
                System.out.print("Invalid move, please try again.\nEnter row: ");
                row = scanner.nextInt();
                System.out.print("Enter column: ");
                column = scanner.nextInt();
                System.out.print("Enter number: ");
                number = scanner.nextInt();
            }
            board[row - 1][column - 1] = number;
            printBoard();
        }
        System.out.println("Congratulations, you win!");
    }

    private boolean validateInput(String input) {
        if (input.length() != BOARD_SIZE) {
            return false;
        }
        for (int i = 0; i < BOARD_SIZE; i++) {
            if (!Character.isDigit(input.charAt(i))) {
                return false;
            }
        }
        return true;
    }

    private boolean isBoardCompleted() {
        for (int i = 0; i < BOARD_SIZE; i++) {
            for (int j = 0; j < BOARD_SIZE; j++) {
                if (board[i][j] == 0) {
                    return false;
                }
            }
        }
        return true;
    }

    private boolean isValidMove(int row, int column, int number) {
        if (board[row][column] != 0) {
            return false;
        }
        for (int i = 0; i < BOARD_SIZE; i++) {
            if (board[row][i] == number || board[i][column] == number) {
                return false;
            }
        }
        int boxRow = row / BOX_SIZE * BOX_SIZE;
        int boxColumn = column / BOX_SIZE * BOX_SIZE;
        for (int i = boxRow; i < boxRow + BOX_SIZE; i++) {
            for (int j = boxColumn; j < boxColumn + BOX_SIZE; j++) {
                if (board[i][j] == number) {
                    return false;
                }
            }
        }
        return true;
    }

    private void printBoard() {
        for (int i = 0; i < BOARD_SIZE; i++) {
            if (i % BOX_SIZE == 0) {
                System.out.println(" -------------------------");
            }
            for (int j = 0; j < BOARD_SIZE; j++) {
                if (j % BOX_SIZE == 0) {
                    System.out.print("| ");
                }
                System.out.print(board[i][j] == 0 ? " " : Integer.toString(board[i][j]));
                System.out.print(' ');
            }
            System.out.println("|");
        }
        System.out.println(" -------------------------");
    }

    public static void main(String[] args) {
        SudokuGame game = new SudokuGame();
        game.startGame();
    }
}

这个程序使用控制台进行输入和输出，首先要求用户输入一个数独游戏的初始状态，然后程序会依次提示用户输入每一步的行、列和数字，并判断这一步是否合法，直到用户成功填完整个数独。