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Even i'm casting Object into int, But this exception occur...

Actually my Hibernate-JPA method was return Object then i'm converting that Object into int...

Hear is my Hiberanate code..

@Transactional
public Object getAttendanceList(User user){

    Query query = entityManager.createQuery("select Count(ad) from AttendanceDemo ad inner join ad.attendee at  where at.user=:user",
            Long.class);
    query.setParameter("user", user);
    return query.getSingleResult();
}

Now i'm converting this Object as int..

int k = (Integer) userService.getAttendanceList(currentUser);

i'm converting Object to Integer... hear any problem

Please help me...

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Looks like getAttendanceList is returning you Long. Can you post the code for the same –  zerocool Jun 18 at 8:29
 
Are you sure you're returning an Integer? ClassCastException says that you're not returning an Integer... –  Matteo N. Jun 18 at 8:31
 
Yes.. i want to store getAttendanceList() method return value into k. then only ClassCastException coming and now i'm casting to (Integer) but again that exception come.. –  SWEE Jun 18 at 8:34

2 Answers

up vote 1 down vote accepted

Use:

((Long) userService.getAttendanceList(currentUser)).intValue();

instead.

The .intValue() method is defined in class Number, which Long extends.

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But IDE shows... The method intValue() is undefined for the type Object –  SWEE Jun 18 at 8:30
1  
Why not use ((Number) userService.getAttendanceList(currentUser)).intValue(); –  johnchen902 Jun 18 at 8:30
 
@user2496295 see my edit, I forgot the Long cast –  fge Jun 18 at 8:31
 
@johnchen902 yes, that is true... But in this case I am not sure OP really wants that. Or that the db model will change from Long to some other numeric type overnight ;) –  fge Jun 18 at 8:33
 
oh... thankyou.. fge.. it's working... but when we write like ((Number) userService.getAttendanceList(currentUser)).intValue(); it is not working why??? –  SWEE Jun 18 at 8:40
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up vote 1 down vote

The number of results can (theoretically) be greater than the range of an integer. I would refactor the code and work with the returned long value instead.

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