public class LikeThis
{
   public static void main(String[] args)
   {
	 //example data
	 int[][] array = new int[5][10];
	 double value = 23.5;
 
	 /*
	 create the Random object with the
	 time in miliseconds as the seed
	 */
	 long seed = new Date().getTime();
	 Random randNumGen = new Radnom(seed);
 
	 //get the coordinates
	 int x = randNumGen.nextInt(5);
	 int y = randNumGen.nextInt(10);
 
	 //access and modify the array
	 array[x][y] = value;
   }
}