The existing custom exception NonMatchingChecksumException extends the IllegalArgumentException class. Since this class extends a RunTimeException, it is not "necessary" to declare in the convert method in HashStoreConverter.
To assist the client with exception handling, declare that a NonMatchingChecksumException will be thrown in the convert method.
The existing custom exception
NonMatchingChecksumExceptionextends theIllegalArgumentExceptionclass. Since this class extends aRunTimeException, it is not "necessary" to declare in theconvertmethod inHashStoreConverter.To assist the client with exception handling, declare that a
NonMatchingChecksumExceptionwill be thrown in theconvertmethod.