CallQueryWithSettings.java

// call the named query
Query nq = this.em.createNamedQuery("selectAuthorOfBook2");
List<AuthorValue> authors = nq.getResultList();

CallSimpleQuery.java

// call the named query
TypedQuery<Author> nq = this.em.createNamedQuery("selectAuthorOfBook", Author.class);
nq.setParameter("title", "%Java%");
List<Author> authors = nq.getResultList();

DefineQueryWithSettings.java

// define the named query
Query q = this.em.createNativeQuery("SELECT a.id, a.firstName, a.lastName FROM Author a", "AuthorValue");
q.setFirstResult(0);
q.setMaxResults(5);
this.em.getEntityManagerFactory().addNamedQuery("selectAuthorOfBook2", q);

DefineSimpleQuery.java

// define the named query
Query q = this.em.createQuery("SELECT a FROM Book b JOIN b.authors a WHERE b.title LIKE :title GROUP BY a");
this.em.getEntityManagerFactory().addNamedQuery("selectAuthorOfBook", q);