黄蓉填充九宫格

public static void main(String[] args) {
    int count = 1;
    int x = 0;
    int y = 1;
    int[][] arr = new int[3][3];

    arr[0][1] = 1;

    while (count < 9) {
        int[] index = getIndex(arr, x, y);
        x = index[0];
        y = index[1];
        arr[x][y] = ++count;
    }
    System.out.println(Arrays.toString(arr[0]));
    System.out.println(Arrays.toString(arr[1]));
    System.out.println(Arrays.toString(arr[2]));
}

public static int[] getIndex(int[][] arr, int x, int y) {
   int tempX = x - 1 < 0 ? 2 : x - 1;
   int tempY = y + 1 > 2 ? 0 : y + 1;

   if (arr[tempX][tempY] != 0) {
       return new int[]{x + 1, y};
   } else {
       return new int[]{tempX, tempY};
   }
}