I am using Eclipse Java EE Edition. I cannot execute a query by using
the object of EntityManager. It throws a Null Pointer Exception in the
line which includes the statement "q.getResultList();". It says that
"No API environment is registered for this thread". What is the wrong
with this usage? I didn't try to upload my application to Google
server's anymore.
EntityManagerFactory emf =
Persistence.createEntityManagerFactory("transactions-optional");
EntityManager em = emf.createEntityManager();
ShineeUser u = new ShineeUser();
u.setTitle("ilk user");
String query = "select from " + ShineeUser.class.getName();
try {
em.persist(u);
Query q = em.createQuery(query);
q.getResultList();
} finally {
//
}
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