//JPQL
    TypedQuery<Cat> queryJpql = em.createQuery(
            "SELECT c FROM Cat c JOIN c.owner o WHERE o.name=:ownerName", Cat.class);
    queryJpql.setParameter("ownerName", "Bill");
    List<Cat> catsJpql = queryJpql.getResultList();
    catsJpql.forEach(System.out::println);

    //Querydsl
    JPAQuery queryFactory = new JPAQuery(em);
    QCat cat = QCat.cat;
    QOwner owner = QOwner.owner;
    List<Cat> catsQdsl = queryFactory.from(cat)
            .join(cat.owner, owner)
            .where(owner.name.eq("Bill"))
            .list(cat);
    catsQdsl.forEach(System.out::println);

    //Criteria Query
    CriteriaBuilder cb = em.getCriteriaBuilder();
    CriteriaQuery<Cat> criteriaQuery = cb.createQuery(Cat.class);
    Root<Cat> catQ = criteriaQuery.from(Cat.class);
    Join<Cat, Owner> ownerQ = catQ.join(Cat_.owner);
    criteriaQuery.where(cb.equal(ownerQ.get(Owner_.name), "Bill"));
    TypedQuery<Cat> query = em.createQuery(criteriaQuery);
    List<Cat> catsCrQ = query.getResultList();
    catsCrQ.forEach(System.out::println);