public class GameOfLife
{
  private final int GRID_SIZE = 64;
  public boolean [][] grid = new boolean[GRID_SIZE][GRID_SIZE];
  //default constructor
  public GameOfLife()
  {
    for(int i=0;i<GRID_SIZE;++i)
    {
      for(int j=0;j<GRID_SIZE;++j)
    {
      grid[i][j] = false;
    }
    }
  }

  public int getGridSize()
  {
    return GRID_SIZE;
  }

  public int getLiveNeighbors(int i,int j)
  {
    int neighbors = 0;
    for( int tmp_i = i-1; tmp_i <= i+1; ++tmp_i )
    {
      for( int tmp_j = j-1; tmp_j <= j+1; ++tmp_j )
      {
        if( tmp_i < 0 || tmp_i >= GRID_SIZE || tmp_j < 0 || tmp_j >= GRID_SIZE )
        {}
        else
        {
          if( grid[tmp_i][tmp_j] )
          {
            neighbors++;
          }
        }
      }
    }
    return neighbors;
  }

  public void nextIteration()
  {
    boolean [][] newGrid = new boolean[GRID_SIZE][GRID_SIZE];

    for(int i=0;i<GRID_SIZE;++i)
    {
      for(int j=0;j<GRID_SIZE;++j)
      {
        newGrid[i][j] = grid[i][j];
      }
    }

    for( int i=0;i<GRID_SIZE;++i)
    {
      for( int j=0;j<GRID_SIZE;++j)
      {
        int my_neighbors = getLiveNeighbors(i,j);
        if( !newGrid[i][j] && my_neighbors == 3)
        {
          grid[i][j] = true;
        }

        else if( newGrid[i][j] && ( my_neighbors == 2 || my_neighbors == 3 ) )
        {
          grid[i][j] = true;
        }

        else
        {
          grid[i][j] = false;
        }
      }
    }
    System.out.println("Change of assignment");
  }
}