方法返回null空指针报错

Question

调用一个方法返回了null，但这个对象我没有调用，程序就报空指针错误
这个是调用的方法

public TmVhcVehicleMovement findByPreVehicleIdAndUlocNo(Long vehicleId, Long ulocId)
   {
     String hql = "from TmVhcVehicleMovement where tmVhcVehicleId=:tmVhcVehicleId and tmBasUlocId=:tmBasUlocId";
    Map<String, Long> params = new HashMap();
     params.put("tmVhcVehicleId", vehicleId);
    params.put("tmBasUlocId", ulocId);
    List<TmVhcVehicleMovement> list = find(hql, params);
     if (StringUtil.isNotEmpty(list)) {
       return (TmVhcVehicleMovement)list.get(0);
   }
     return null;
  }

这个是我去做判断的时候

if(vhcVehicleMovementBO.findByPreVehicleIdAndUlocNo(vhcVehicle.getId(),trUloc.getId())==null){
                        System.out.println("11111-------------------------------");
}

这里没有进到输出11111，直接就报空指针了，这是为啥

Answer 1

可能是这两个是对象是空