public boolean addFarmObjectToGrid(FarmObject obj) {
if (grid[obj.getX()][obj.getY()] != null) {
return false;
}
grid[obj.getX()][obj.getY()] = obj;
return true;
}
private void move(FarmObject obj) {
grid[obj.getX()][obj.getY()] = null;
grid[obj.getNewX()][obj.getNewY()] = obj;
}