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<!DOCTYPE HTML>
<html lang="zh-CN">
<head><meta name="generator" content="Hexo 3.9.0">
<meta charset="utf-8">
<meta name="keywords" content="YangMing's Blog">
<meta name="description" content="YangMing's Blog">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
<meta name="renderer" content="webkit|ie-stand|ie-comp">
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<meta name="format-detection" content="telephone=no">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
<title>YangMing's Blog</title>
<link rel="icon" type="image/png" href="/favicon.png">
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<body>
<header class="navbar-fixed">
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<div class="brand-logo">
<a href="/" class="waves-effect waves-light">
<img src="/medias/logo.png" class="logo-img" alt="LOGO">
<span class="logo-span">YangMing's Blog</span>
</a>
</div>
<a href="#" data-target="mobile-nav" class="sidenav-trigger button-collapse"><i class="fa fa-navicon"></i></a>
<ul class="right">
<li class="hide-on-med-and-down">
<a href="/" class="waves-effect waves-light">
<i class="fa fa-home"></i>
<span>首页</span>
</a>
</li>
<li class="hide-on-med-and-down">
<a href="/tags" class="waves-effect waves-light">
<i class="fa fa-tags"></i>
<span>标签</span>
</a>
</li>
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<a href="/categories" class="waves-effect waves-light">
<i class="fa fa-bookmark"></i>
<span>分类</span>
</a>
</li>
<li class="hide-on-med-and-down">
<a href="/archives" class="waves-effect waves-light">
<i class="fa fa-archive"></i>
<span>归档</span>
</a>
</li>
<li class="hide-on-med-and-down">
<a href="/about" class="waves-effect waves-light">
<i class="fa fa-user-circle-o"></i>
<span>关于</span>
</a>
</li>
<li class="hide-on-med-and-down">
<a href="/friends" class="waves-effect waves-light">
<i class="fa fa-address-book"></i>
<span>友情链接</span>
</a>
</li>
<li>
<a href="#searchModal" class="modal-trigger waves-effect waves-light">
<i id="searchIcon" class="fa fa-search" title="搜索"></i>
</a>
</li>
</ul>
<div id="mobile-nav" class="side-nav sidenav">
<div class="mobile-head bg-color">
<img src="/medias/logo.png" class="logo-img circle responsive-img">
<div class="logo-name">YangMing's Blog</div>
<div class="logo-desc">
杨明的个人博客
</div>
</div>
<ul class="menu-list mobile-menu-list">
<li>
<a href="/" class="waves-effect waves-light">
<i class="fa fa-fw fa-home"></i>
首页
</a>
</li>
<li>
<a href="/tags" class="waves-effect waves-light">
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标签
</a>
</li>
<li>
<a href="/categories" class="waves-effect waves-light">
<i class="fa fa-fw fa-bookmark"></i>
分类
</a>
</li>
<li>
<a href="/archives" class="waves-effect waves-light">
<i class="fa fa-fw fa-archive"></i>
归档
</a>
</li>
<li>
<a href="/about" class="waves-effect waves-light">
<i class="fa fa-fw fa-user-circle-o"></i>
关于
</a>
</li>
<li>
<a href="/friends" class="waves-effect waves-light">
<i class="fa fa-fw fa-address-book"></i>
友情链接
</a>
</li>
<li><div class="divider"></div></li>
<li>
<a href="https://github.com/learneryog" class="waves-effect waves-light" target="_blank">
<i class="fa fa-github-square fa-fw"></i>Fork Me
</a>
</li>
</ul>
</div>
</div>
<style>
.nav-transparent .github-corner {
display: none !important;
}
.github-corner {
position: absolute;
z-index: 10;
top: 0;
right: 0;
border: 0;
transform: scale(1.1);
}
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color: #0f9d58;
fill: #fff;
height: 64px;
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animation: a 0.56s ease-in-out;
}
.github-corner .octo-arm {
animation: none;
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@keyframes a {
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to {
transform: rotate(0);
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20%,
60% {
transform: rotate(-25deg);
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40%,
80% {
transform: rotate(10deg);
}
}
</style>
<a href="https://github.com/learneryog" class="github-corner tooltipped hide-on-med-and-down" target="_blank"
data-tooltip="Fork Me" data-position="left" data-delay="50">
<svg viewBox="0 0 250 250" aria-hidden="true">
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<style>
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width: 45px;
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line-height: 55px;
border-radius: 45px;
background: transparent;
cursor: pointer;
z-index: 100;
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#prev-cover {
position: absolute;
top: 48%;
left: 8px;
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#next-cover {
position: absolute;
top: 48%;
right: 8px;;
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#prev-cover i {
margin-right: 3px;
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#next-cover i {
margin-left: 3px;
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.carousel-control:hover {
background-color:rgba(0, 0, 0, .4);
}
.carousel-control i {
color: #fff;
font-size: 2.4rem;
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</style>
<div class="carousel carousel-slider center index-cover" data-indicators="true" style="margin-top: -64px;">
<div id="prev-cover" class="left waves-effect carousel-control">
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<div class="carousel-item red white-text bg-cover about-cover">
<div class="container">
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<div class="col s10 offset-s1 m8 offset-m2 l8 offset-l2">
<div class="brand">
<div class="title center-align">
杨明的博客
</div>
<div class="description center-align">
<span id="jinrishici-sentence">正在加载今日诗词....</span>
</div>
</div>
</div>
</div>
<script>
// 每天切换 banner 图. Switch banner image every day.
$('.bg-cover').css('background-image', 'url(/medias/banner/' + new Date().getSeconds() + '.jpg)');
</script>
<div class="cover-btns">
<a href="#indexCard" class="waves-effect waves-light btn">
<i class="fa fa-angle-double-down"></i>开始阅读
</a>
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<i class="fa fa-github-alt"></i>Github
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<a href="mailto:[email protected]" class="tooltipped" target="_blank" data-tooltip="邮件联系我" data-position="top" data-delay="50">
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<div class="carousel-item amber white-text carousel-post bg-cover"
style="background-image: url('/medias/featureimages/17.jpg');">
<div class="container">
<div class="row">
<div class="col s10 offset-s1">
<div class="title center-align">ArrayList与LinkList对比</div>
<div class="description center-align">
本文简要总结一下java中ArrayList与LinkedList的区别，这在面试中也是常常会问到的一个知识点。
先来看一下ArrayList和LinkedList的关系是怎样的：
从继承体系可以看到，ArrayList与Linked
</div>
<div class="cover-btns">
<a href="/2019/05/04/ArrayList与LinkedList对比/" class="waves-effect waves-light btn" target="_blank">
<i class="icon fa fa-eye fa-fw"></i>阅读更多
</a>
</div>
</div>
</div>
</div>
</div>
<div class="carousel-item amber white-text carousel-post bg-cover"
style="background-image: url('/medias/featureimages/8.jpg');">
<div class="container">
<div class="row">
<div class="col s10 offset-s1">
<div class="title center-align">ORM与反射</div>
<div class="description center-align">
ORM（Object Relation Mapping）对象关系模型关系模型（数据库表）： 表、字段、字段类型对象模型（java实体类）：类、属性、属性类型通过ORM框架解除模型之间的阻抗。
利用反射实现ORM中的准备预编译SQL语句
</div>
<div class="cover-btns">
<a href="/2019/05/25/ORM与反射/" class="waves-effect waves-light btn" target="_blank">
<i class="icon fa fa-eye fa-fw"></i>阅读更多
</a>
</div>
</div>
</div>
</div>
</div>
<div class="carousel-item amber white-text carousel-post bg-cover"
style="background-image: url('/medias/featureimages/6.jpg');">
<div class="container">
<div class="row">
<div class="col s10 offset-s1">
<div class="title center-align">Ubuntu环境下安装配置Docker</div>
<div class="description center-align">
安装环境：Ubuntu 18.04
1. 系统要求Ubuntu系统对Docker的支持十分成熟，只要是64位的即可。Docker目前支持的最低的Ubuntu版本为14.04 LTS，但实际上从稳定性上考虑，推荐使用16.04 LTS或1
</div>
<div class="cover-btns">
<a href="/2019/05/30/Ubuntu环境下安装配置Docker/" class="waves-effect waves-light btn" target="_blank">
<i class="icon fa fa-eye fa-fw"></i>阅读更多
</a>
</div>
</div>
</div>
</div>
</div>
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style="background-image: url('/medias/featureimages/8.jpg');">
<div class="container">
<div class="row">
<div class="col s10 offset-s1">
<div class="title center-align">hashCode和equals方法</div>
<div class="description center-align">
hashCode和equals方法是Object类中的两个常用方法。其定义如下：
// hashCode()方法默认是native方法：
public native int hashCode();
// equals(obj)默认比较的是
</div>
<div class="cover-btns">
<a href="/2019/05/21/hashCode和equals方法/" class="waves-effect waves-light btn" target="_blank">
<i class="icon fa fa-eye fa-fw"></i>阅读更多
</a>
</div>
</div>
</div>
</div>
</div>
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style="background-image: url('/medias/featureimages/30.jpg');">
<div class="container">
<div class="row">
<div class="col s10 offset-s1">
<div class="title center-align">线程池</div>
<div class="description center-align">
为什么要用线程池？单线程方式存在以下几个问题：
线程的工作周期：假设线程创建所需时间为T1，线程执行任务所需时间为T2，线程销毁所需的时间为T3，往往是T1+T3大于T2，所以如果频繁的创建线程会损耗过多的额外时间。
如果有任务来了，再去
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单例模式是最简单的设计模式之一，这种设计模式是一种创建型的模式，提供了创建对象的最佳方式。
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一、ArrayList的继承体系和特点ArrayList总体继承体系图如下：
ArrayList的特点主要有以下几点：
ArrayList在内存中分配连续的存储空间，可理解为长度可变的数组。
ArrayList存储元素可以重复，存储顺序
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