【Java容器】_<Java容器>全部问题与内容精选-阿里云

史上最全的Java容器集合之LinkedHashMap（源码解读）

概述LinkedHashMap是HashMap的子类，它的大部分实现与HashMap相同，两者最大的区别在于，HashMap的对哈希表进行迭代时是无序的，而 LinkedHashMap对哈希表迭代是有序的，LinkedHashMap默认的规则是，迭代输出的结果保持和插入key-value pair的...

史上最全的Java容器集合之HashMap（源码解读）（二）

HashMap的成员方法put方法//向哈希表中添加元素 public V put(K key, V value) { return putVal(hash(key), key, value, false, true); } 复制代码向用户开放的put方法调用的是putVal方法：putVal方法...

「大师课」搞定 Java 开发基础

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Java Spring Boot 2.6.0开发实战-1024程序员节创造营公益课

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Java Web开发-Web应用、Tomcat、HTTP请求与响应

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史上最全的Java容器集合之HashMap（源码解读）（一）

一什么是MapMap是一个接口，他是key-value的键值对，一个map不能包含重复的key，并且每一个key只能映射一个value；Map接口提供了三个集合视图：key的集合，value的集合，key-value的集合；Map内元素的顺序取决于Iterator的具体实现逻辑&#x...

史上最全的Java容器集合之equals 和 hashCode

equals()方法Object原生的equals方法： public boolean equals(Object obj) { return (this == obj); } 复制代码从代码中可以看出，原生的equals方法使用的是“==”来比较的。学过Java的人都应该知道，“=&.....

史上最全的Java容器集合之Vector和LinkedList(源码解读)

Vector 源码分析其实Vector要讲的东西不多了，因为它和ArrayList的代码很像，就是再每个方法上加了锁，如下图因为大部分和前面差不多，我来说说不同的点吧看图上面的这个是Vetor和ArrayList不同的另一个点它的增长因子是可以自己定义的。我们来看grow方法这段代码是扩容代码，...

史上最全的Java容器集合之ArrayList(源码解读)（二）

add(int, E)方法public void add(int index, E element) { // 插入数组位置检查 rangeCheckForAdd(index); // 确保容量，如果需要扩容的话则自动扩容 ensureCapacityInternal(size + 1); // I...

史上最全的Java容器集合之ArrayList(源码解读)（上）

一、ArrayList认识概念概念：ArrayList是一个其容量能够动态增长的动态数组。但是他又和数组不一样，下面会分析对比。它继承了AbstractList，实现了List、RandomAccess, Cloneable, java.io.Serializable。RandomAccess接口，...

史上最全的Java容器集合之基础数据结构（手撕链表）

数组第一个数组是一种效率最高的存储和随机访问的方式数组是一种连续存储线性结构，元素类型相同，大小相等,存取速度快无论使用哪种类型的数组，数组的标识符[] ,它其实是一个引用，指在堆中创建了一个真实的对象(这个对象对我们程序员是不可见的)，我自己找了半天，我说他既然有length属性，那我肯定能在Ja...

史上最全的Java容器集合之入门

集合的由来通常，我们的Java程序需要根据程序运行时才知道创建了多少个对象。但若非程序运行，程序开发阶段，我们根本不知道到底需要多少个数量的对象，甚至不知道它的准确类型。为了满足这些常规的编程需要，我们要求能在任何时候，任何地点创建任意数量的对象，而这些对象用什么来容纳呢？我们首先想到...

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更新时间 2023-11-24 18:41:51

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