ai2017 2022-02-12 23:13 开发者_如何学运维 白雪公主，灰姑娘，长发公主，睡美人详细介绍看这里：白雪公主http://baike.baidu.com/view/24079.html?wtp=tt灰姑娘http://baike.baidu.com/view/29175.html?wtp=t
Is ArrayList an array or a list in java? what is the time complexity for the get operat开发者_开发技巧ion, is it O(n) or O(1)?An ArrayList in Java is a List that is backed by an array.
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