ArrayIndexOutOfBoundsException when initializing a 2dimensional array of objectts

Question

I have a very simple question but i can\'t figure out why I\'m having this exception. I\'m trying to create a 2-dimensional Array of objects for a sudoku puzzle, but when I\'m i

Answer 1

grid = new Cell[lines][lines]; creates an array of size [0][0] because lines is still 0 when that statement is run.

Whavetever changes you make to lines later on won't affect the array size, which will remain [0][0]...

Simpler example:

int size = 0;
Object[] array = new Object[size];
size = 1;
System.out.println(array.length); //prints 0, not 1