Java arraylist扩容的相关内容

【Java】ArrayList扩容规则

初始大小ArrayList的初始大小由你选定的构造函数决定，如果你使用无参构造函数，那么初始大小为0，是一个空数组。而如果你选用有参数的构造函数，那么初始大小为你输入的大小因此如果问你ArrayList的初始容量，不要直接回答10，而是回答0。扩容规则当ArrayList存储不下数据之后，就会发生扩...

Java—ArrayList（扩容机制）

对于ArrayList集合可能大家并不陌生，但ArrayList集合的扩容机制大家是否了解呢？我们今天着重来看看适用于什么场景？检索比较多的场景ArrayList特点1、ArrayList集合底层采用了数据这种数据结构，是Object类型2、ArrayList的默认初始容量为10，扩容因子为1.53...

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java源码分析：ArrayList的扩容机制

ArrayList是java中最常用的集合之一，底层的数据结构是数组，在学习集合时，阅读源码是必不可少的环节之一，阅读源码可以有效的帮助我们深入了解其工作原理，下面根据源码详细的介绍下扩容机制，环境为jdk1.8。首先看看它的无参构造，ArrayList无参构造方法如下： /**...

Java ArrayList自动扩容机制

Java ArrayList自动扩容机制动态扩容1、add(E e)方法中 ① ensureCapacityInternal(size+1),确保内部容量，size是添加前数组内元素的数量 ② elementData[size++] = e 添加元素到...

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更新时间 2023-07-30 09:10:47

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