How do I randomly fill an array in Java?

Question

I\'m writing a program that creates a 2D array from a integer n. I then have to fill the array with values from 1 to the nn array size and check to see if it is a magic

Answer 1

To create a random square matrix of values from 0 to n*n-1:

System.out.print("Enter an whole number: ");
int n = scan.nextInt();
int size = n * n;

// create see dvalues
List values = new ArrayList(size);
for (int i=0; i

It's only a slight modification to use the range 1 to n*n.

The first stage seeds the range with unique values then uses the standard function Collections.shuffle() to randomize the order.