인프런 커뮤니티 질문&답변

public Member save(Member member){
    member.setId(sequence++);
    store.put(member.getId(), member);
    return member;
}

 

public Member save(){
        Member member = new Member();
        member.setId(sequence++);
        store.put(member.getId(), member);
        return member;
    }

혹시 어떤 방법이 좋은지랑 무슨 차이가 있는지 알수 있을까요