에러사전

Exception in thread "main" java.lang.NullPointerException: Cannot invoke "hello.core.member.Member.getName()" because "findMember" is null
at hello.core.MemberApp.main(MemberApp.java:17)

MemoryMemberRepository

 @Override
  public void save(Member member) {
    store.put(member.getId(),member);  //이 부분 작성안해서 오류난 것

  }