There are no elements available in the array if you declare it like this: new int[0][0];
new int[1][1]; has 1 x 1 elements: [0][0].
new int[2][2]; has 2 x 2 elements: [0][0], [1][0], [0][1] and [1][1].
...

You have to declare the array with the length you want + 1, because the array index starts with zero.

new int[1]; has 1 element: [0], length is 1.
new int[2]; has 2 elements: [0] and [1], length is 2.
...

-------------------
Visit my Blog http://limaso.de

solved it (without declaring array length):