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

The problem is that the default value for an int is 0.

So when you create your Sudoku object, grid = new Cell[lines][lines]; is equivalent to grid = new Cell[0][0];

Either change your makeGrid method or provide a size in your constructor.

public void makeGrid(int size) {
     this.lines = size;
     grid = new Cell[size][size];
     for(int i=0;i