在使用Java的时候，我们都会遇到使用集合（Collection）的时候，但是Java API提供了多种集合的实现，我在使用和面试的时候频频遇到这样的“抉择” 。 :）（主要还是面试的时候）久而久之，也就有了一点点的心得体会，写出来以供大家讨论 。-In the use of Java, we would encounter with a collection (Collection) of the time, but a collection of Java API provides a variety of implementation, I frequently use and when the interview encounter such a " choice."　:) (Mainly when the interview) over time, and will have a little bit of feelings and experiences, to write out for discussion.