JPA - EntityManger.refresh Examples

    private static void displayEntities(EntityManagerFactory emf) {
        //loading all entities
        EntityManager em = emf.createEntityManager();
        Query query = em.createQuery("Select e from Employee e");
        List<Employee> list = (List<Employee>) query.getResultList();
        for (Employee employee : list) {
            //sending to ui for display
            displayEntity(employee);
            print("refreshing employee", employee);
            //now refreshing entity before doing something with it
            em.refresh(employee);
            print("after refreshing employee", employee);
        }
    }

    private static void displayEntity(Employee employee) {
        System.out.println("-- displaying employee --");
        System.out.println(employee);
        employee.setDepartment("Sales");
        print("employee modified in displayEntity()", employee);
    }