JoinFetch.java

EntityManager em = emf.createEntityManager();
em.getTransaction().begin();

Author a = em.createQuery("SELECT a FROM Author a JOIN FETCH a.books WHERE a.id = 1", Author.class).getSingleResult();

em.getTransaction().commit();
em.close();
	
log.info(a.getFirstName()+" "+a.getLastName()+" wrote "+a.getBooks().size()+" books.");

ThrowLazyInitializationException.java

EntityManager em = emf.createEntityManager();
em.getTransaction().begin();

Author a = em.createQuery("SELECT a FROM Author a WHERE id = 1", Author.class).getSingleResult();

em.getTransaction().commit();
em.close();
	
log.info(a.getFirstName()+" "+a.getLastName()+" wrote "+a.getBooks().size()+" books.");