public static void main(String[] args) { EntityManagerFactory emf = Persistence.createEntityManagerFactory("nwind-pu"); EntityManager em = emf.createEntityManager(); int id = 2; Supplier supp = em.find(Supplier.class, id); System.out.println("Supplier Id:" + supp.getSupplierId()); System.out.println("Supplier Name:" + supp.getCompanyName()); System.out.println("Products in this category are"); for (Product p : supp.getProducts()) { System.out.println("\t" + p.getProductName()); } }