JPQL查询：查找集合中的最大对象

I have two entities

我有两个实体

Class A{

@OneToMany(mappedBy = "a", cascade = CascadeType.REMOVE)
private List<B> b;

private Integer credits;
//other fields
}

Class B{

@ManyToOne
@JoinColumn(name = "a_fk")
private A a;

private Integer reputations;
//other fields
}
Class A{

@OneTo