title: Shuffling a 2D array in Java
body: <p>I'm trying to shuffle a 2D object array in Java. I thought Collections.shuffle would do the trick, but it looks like it only shuffles the objects in each row, but does not mix rows together, which I wanted it to do. Any built in methods or easy to implement methods that can shuffle a 2D array for me? The array is <code>cards[13][4]</code>.</p>