sudoku check subgrid error

Hi can anyone tell me what im doing wrong 开发者_开发问答here? i want to check each subgrid for repeated values in a 9by 9 square.

my method works first by creating each subgrid a one dimensional array which can then check each row for each subgrid. and for it to go to each subgrid i provide its coordinates myself. it checks the first grid 0,0 but does not check other subgrids for repeated values.

can anyone tell me what im doing wrong?

public class SudokuPlayer
{
private int [][]  game;
public enum CellState { EMPTY, FIXED, PLAYED };
private CellState[][] gamestate;
private int [][] copy;

private static final int GRID_SIZE=9;

private boolean whichGameToReset;
private int len;
private int stateSize;
private int row;
private int col;

private boolean coordinates(int startX, int startY)
{


           row=startX;
           col=startY;
          if(isBoxValid()==false)
          {
              return false; 
          }

           return true;
    }



public boolean check()
{
    if(coordinates(0,0)==false)
    {
        return false;
    }
    if(coordinates(0,3)==false)
    {
        return false;
    }
    if(coordinates(0,6)==false)
    {
        return false;
    }
    if(coordinates(1,0)==false)
    {
        return false;
    }
    if( coordinates(1,3)==false)
    {
        return false;
    }
    if( coordinates(1,6)==false)
    {
        return false;
    }
    if(coordinates(2,0)==false)
    {
        return false;
    }
    if(coordinates(2,3)==false)
    {
        return false;
    }
    if(coordinates(2,6)==false)
    {
        return false;
    }

    return true;
}




private boolean isBoxValid()
{

    int[] arrayCopy = new int[game.length];


    int currentRow = (row/3)*3;
    int currentCol = (col/3)*3;
    int i = 0;

    for ( int r =currentRow; r < 3; r++)
    {

        for( int c =currentCol; c < 3; c++)
        {
            arrayCopy[i] = game[r][c];
            i++;
        }
    }

    for ( int p =0; p < arrayCopy.length; p++)
    {
        for ( int j = p+1; j < arrayCopy.length; j++)
        {
            if ( arrayCopy[p] == arrayCopy[j] && arrayCopy[j]!=0)
            {
                return false;
            }
        }
    }

    return true;
}
}

The problem is in your isBoxValid() method. You are initializing r and c to be currentRow and currentCol, respectively, but you run the loop up to a hard coded value of 3, not 3+currentRow or 3+currentCol. When currentRow and currentCol are 0, it works fine, but for other numbers, not so much.

Oh, another thing that's nice about writing concise code: it's easier to see where your errors are. Take another look at the numbers you've hard-coded into check(): you're incrementing the columns by 3 and the rows by 1. That would be much easier to spot if you compressed it into a pair of for loops.