摘要: 1.集合存在的理由 数据多了用对象存,对象多了用集合存! 它是变长的,可以接受各种不同的对象,是数组不能替代的!2.大致结构3.各子类数据结构:所以有什么特性自然明了 ArrayList:数组 LinkedList:双向非循环链表 HashSet:hash表4.父接口Collection都... 阅读全文
posted @ 2015-08-12 15:35 洱海 阅读(170) 评论(0) 推荐(0) 编辑
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