标签：
http://arron-li.iteye.com/blog/645008
arraylist
增强for 循环 http://www.cnblogs.com/linjiqin/archive/2011/02/10/1950929.html
ArrayList的ConcurrentModificationException
原文地址：http://www.cnblogs.com/pashansongshu/p/4513778.html
