I have to populate a 2D array and print the result

Question

I have the following function:

the purpose is to have the 1st column as serial number 0 through 63, rest of the columns will start with 63, 62, 56. But once the value is 63, the next value would be 0 and then it will keep increasing by 1. so the 2nd row will have 0, 63, 57. 3rd row will have 1, 0, 58 and so on..

public void lookup_table(int x) {
int i = 64, j= 4 , a, b;
int arr_lookup [][] = new int [i][j];
for (a = 0; a < 64; a++){
arr_lookup[a][0] = a ;
if (a == 0) {
arr_lookup[a][1] = 63;
arr_lookup [a][2] = 62;
arr_lookup [a] [3] = 56;
}
else {
if (arr_lookup [a-1][1]== 63 )
arr_lookup[a][1] = 0;
else
arr_lookup [a][1] = arr_lookup [a-1][1] + 1;
if (arr_lookup [a-1][2]== 63 )
arr_lookup[a][2] = 0;
else
arr_lookup [a][2] = arr_lookup [a-1][2] +1;
if (arr_lookup [a-1][3]== 63 )
arr_lookup[a][3] = 0;
else
arr_lookup [a][3] = arr_lookup [a-1][3] +1;
}
}
System.out.println(arr_lookup[a][0]+'-'+arr_lookup[a][1]+'-'+arr_lookup[a][2]+'-'+arr_lookup[a][3]);
}

Answer 1

To populate the array, you could have a for loop for each dimension that populates it
To print the result, you'd have to do
System.out.println(Arrays.toString(arr_lookup));