Objects and Classes cannot find symbol variable.

I feel like the problem is that I do not reset the array before each case, but I am not sure how to do that.

Something like this may do the trick:

Code:

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public void resetBoard()
{
    for(int i = 0; i < rows; i++)
          for(int j = 0; j < columns; i++)
              board[rows][column] = null;
}

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You bypass each of the case statements when direction==0

But you were getting the exception at LegalMove() case 5 (assuming that's line 75). So EITHER putting

Code:

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System.out.println("row="+row+"column="+column);

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at the start of that case block will print some useful diagnostic information OR you don't get the exception.