import java.util.*; 

class Slices {
  public static void main(String[] args) {
    int[] a = {3, 2, 1};

    int[][] b = {{3, 2, 1},
                 {5, 2, 8},
                 {7, 6, 1}};

    System.out.println( b[1][2] ); // prints 8

int[][] c[] = // same as int[][][] c; or int[] c[][]; or int c[][][];

    {{{1, 0, 0, 1},
      {1, 1, 0, 1},
      {1, 0, 1, 1},
      {1, 0, 0, 1}}     ,

     {{1, 1, 1, 1},
      {0, 0, 1, 0},
      {0, 1, 0, 0},
      {1, 1, 1, 1}}     ,

     {{1, 0, 0, 1},
      {1, 1, 0, 1},
      {1, 0, 1, 1},
      {1, 0, 0, 1}}     ,

     {{1, 1, 1, 1},
      {0, 0, 1, 0},
      {0, 1, 0, 0},
      {1, 1, 1, 1}}     };


int index = 3;

int[][] slice = c[index];

for (int[] row : slice) {
  System.out.println( Arrays.toString(row) );
}

  }
}