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在JDK1.8之前，HashMap使用数组+链表实现，即使用链表处理冲突，同一hash值的节点都存储在一个链表里。但是当位于一个桶中的元素较多，即hash值相等的元素较多时，通过key值依次查找的效率较低。而JDK1.8中，HashMap采用数组+链表+红黑树实现，当链表长度...

Java 集合框架03---ArrayList的源码分析

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上篇我们分析了Java集合的总体类图，下面我们接着来具体探究一下相关的源码。Collection 简介Collection 的定义public interface Collection<E> extends Iterable<E>{}Collection是一个接口，是高度抽象...

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上一章我们学习了HashMap的源码，这一节我们来讨论一下HashTable，HashTable和HashMap在某种程度上是类似的。我们依然遵循以下步骤：先对HashTable有个整体的认识，然后学习它的源码，深入剖析HashTable。 1.HashTab...

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java集合框架02——Collection架构与源码分析

Collection是一个接口，它主要的两个分支是List和Set。如下图所示： List和Set都是接口，它们继承与Collection。List是有序的队列，可以用重复的元素；而Set是数学概念中的集合，不能有...

java集合框架04——LinkedList和源码分析

上一章学习了ArrayList，并分析了其源码，这一章我们将对LinkedList的具体实现进行详细的学习。依然遵循上一章的步骤，先对LinkedList有个整体的认识，然后学习它的源码，深入剖析LinkedList。 LinkedList简介首先...

java集合框架03——ArrayList和源码分析

上一章学习了Collection的架构，并阅读了部分源码，这一章开始，我们将对Collection的具体实现进行详细学习。首先学习List。而ArrayList又是List中最为常用的，因此本章先学习ArrayList。先对ArrayList有个整体的认识，然后学习它的源码...

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