java编译器：必须对其进行捕获或声明以便抛出

今晚凌晨用IDEA编译一段封装Mathout的程序时候，遇到该错误；

原因是，当原来方法使用throws Exception时我需要在调用它时也写上：

//Ahapublic List<RecommendedItem> useCF(DataModel bcModel,long userID,int howMany) throws TasteException{        //BookCrossingRecommender BCR = new BookCrossingRecommender(bcModel);        /*try {            BookCrossingRecommender BCR = new BookCrossingRecommender(bcModel);        }catch (TasteException e){System.out.println("NO!!!!!!!!!!!!");}*/        BookCrossingRecommender BCR = new BookCrossingRecommender(bcModel);        return BCR.recommend(userID,howMany);    }//Aha