java - How to create a multi-dimension array generator? -

i'm trying generate multi-dimensional array works upon random integers generated. i'm unable because doesn't work properly.

public class gen(){     public static void main(string[] args){          int randomrow, randomcol;          int[][] array1 = new int[61][50];          for(int row = 0; row < array1.length; row++){             for(int col = 0; col < array1.length; col++){                 randomrow = 1 + (int)(math.random() * 100);                 randomcol = 1 + (int)(math.random() * 100);                 array1[row][col] = array1[randomrow][randomcol];                 system.out.println(array1[row][col] + "/n");             }         }      } } 

but not work. reason why?

i think trying put random numbers between 0 , 99 in array. correct? if so:

random random = new random(); (int = 0; < array.length; i++)     (int j = 0; j < array[i].length; j++)         array[i][j] = 1 + random.nextint(100); 

note if using java 8 there simpler technique generate array of random integers assigning random value each position:

array[] = random.ints(60, 1, 101).toarray();