《Java集合详解系列》是我在完成夯实Java基础篇的系列博客后准备开始整理的新系列文章。 为了更好地诠释知识点，形成体系文章，本系列文章整理了很多优质的博客内容，如有侵权请联系我，一定删除。 这些文章将整理到我在GitHub上的《Java面试指南》仓库 ...

Certain principles hold for the use of iterators: In general, you should be able to have multiple traversals in progress at the same time; that is, an iterator should allow for the concept of nested ...

A Collection in simple terms means when a group of similar things, often a group created by someone is known as a collection. A collection when collected works like a container – it groups multiple ...

之所以把HashSet和HashMap放在一起讲解，是因为二者在Java里有着相同的实现，前者仅仅是对后者做了一层包装，也就是说HashSet*里面有一个*HashMap（适配器模式）。因此本文将重点分析HashMap。 HashMap实现了Map接口，即允许放入key为null的元素，也允许插入value为null的 ...

One of the nasty little traps a Java developer can run into occurs when Collection.contains(Object) is not used with appropriate understanding. I demonstrate this ...