參考：
http://initbinder.com/articles/cheat-sheet-for-selecting-maplistset-in-java.html
http://www.sergiy.ca/guide-to-selecting-appropriate-map-collection-in-java/
原文釋出時間為：2012-04-16
參考：
http://initbinder.com/articles/cheat-sheet-for-selecting-maplistset-in-java.html
http://www.sergiy.ca/guide-to-selecting-appropriate-map-collection-in-java/
原文釋出時間為：2012-04-16
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