java记录-N皇后递归

@Getter
class Queen {
    private int[][] board = new int[1024][1024];
    private int count = 0;
    private int sum = 0;
    
public int cal(int n, int x, int y) {
            for (int j = x; j < n; j++) {
                if (checkBoard(j, y, n)) {
                    board[y][j] = 1;
                    count = count + 1;
                    if (count == n) {
                        sum = sum + 1;
                        for (int row = 0; row < n; row++) {
                            for (int col = 0; col < n; col++) {
                                System.out.print(board[row][col] + "t");
                            }
                            System.out.println();
                        }
                        System.out.println();
                    }
                    cal(n, 0, y + 1);
                    board[y][j] = 0;
                    count = count - 1;
                }
            }
        return 1;
    }
    private boolean checkBoard(int x, int y, int n) {
        int tempX = x;
        int tempY = y;
        // |方向判断
        while (tempY > 0) {
            tempY--;
            if (board[tempY][tempX] == 1) {
                return false;
            }
        }
        tempX = x;
        tempY = y;
        // /方向判断
        while (tempX < n - 1 && tempY > 0) {
            tempX++;
            tempY--;
            if (board[tempY][tempX] == 1) {
                return false;
            }
        }
        tempX = x;
        tempY = y;
        // 方向判断
        while (tempX > 0 && tempY > 0) {
            tempX--;
            tempY--;
            if (board[tempY][tempX] == 1) {
                return false;
            }
        }
        return true;
    }
}