Better option than array[][]?

Question

Is there a better(faster) option, I'm thinking something from Collections, for working with multideminsional problems where a double array is typically used? Or should I stick with imbedded for loops and double arrays.

Answer 1

For Clarification:
int[][] myArray = new int[100][100];
for(int i = 0; i < myArray.length; i++){
     for(int j = 0; j < myArray.length; j++){
          myArray[i][j] = (int)(Math.random() * 20);