https://zhuanlan.zhihu.com/p/24687801?refer=dreawer
http://www.cnblogs.com/skywang12345/p/3323085.html
https://github.com/CarpenterLee/JCFInternals
http://www.cnblogs.com/whgk/category/909062.html
http://www.cnblogs.com/xiaoxi/category/929860.html
Collection
線程安全性
Vector铜秆、Stack：線程安全债沮，ArrayList、LinkedList：非線程安全
實現(xiàn)方式
LinkedList：雙向鏈表，ArrayList徙鱼，Vector，Stack：數(shù)組
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ArrayList
LinkedList
Vector和Stack
CopyOnWriteArrayList
Map
HashMap
HashMap
LinkedMap
