The following code confuses the inspection system, making IDEA think there is an error when there isn't: package jpatest; import javax.persistence.EntityManager; import javax.persistence.EntityManagerFactory; import javax.persistence.Persistence; import javax.persistence.Query; import java.util.Collection; public class JPATest { public static void main(String[] args) { EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("EmployeeService"); EntityManager entityManager = entityManagerFactory.createEntityManager(); Query query3 = entityManager.createQuery("select new jpatest.IdAndSalary(e.id, e.salary) from Employee e"); Collection result = query3.getResultList(); System.out.println("result.iterator().next() = " + result.iterator().next()); entityManager.close(); entityManagerFactory.close(); } }