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<!doctype html>
<html class="no-js" lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>
JavaSE
</title>
<link href="atom.xml" rel="alternate" title="JavaSE" type="application/atom+xml">
<link rel="stylesheet" href="asset/css/foundation.min.css" />
<link rel="stylesheet" href="asset/css/docs.css" />
<script src="asset/js/vendor/modernizr.js"></script>
<script src="asset/js/vendor/jquery.js"></script>
<script src="asset/highlightjs/highlight.pack.js"></script>
<link href="asset/highlightjs/styles/github.css" media="screen, projection" rel="stylesheet" type="text/css">
<script>hljs.initHighlightingOnLoad();</script>
<script type="text/javascript">
function before_search(){
var searchVal = 'site:hobson.top ' + document.getElementById('search_input').value;
document.getElementById('search_q').value = searchVal;
return true;
}
</script>
</head>
<body class="antialiased hide-extras">
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<li id=""><a target="self" href="index.html">Home</a></li>
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<input type="hidden" id="search_q" name="q" value="" />
<input tabindex="1" type="search" id="search_input" placeholder="Search"/>
</form>
</li>
</ul>
</div></div>
</div>
</section>
</nav>
<nav class="tab-bar show-for-small">
<a href="javascript:void(0)" class="left-off-canvas-toggle menu-icon">
<span> JavaSE</span>
</a>
</nav>
<aside class="left-off-canvas-menu">
<ul class="off-canvas-list">
<li><a href="index.html">HOME</a></li>
<li><a href="archives.html">Archives</a></li>
<li><a href="about.html">ABOUT</a></li>
<li><label>Categories</label></li>
<li><a href="JavaSE.html">JavaSE</a></li>
</ul>
</aside>
<a class="exit-off-canvas" href="#"></a>
<section id="main-content" role="main" class="scroll-container">
<script type="text/javascript">
$(function(){
$('#menu_item_index').addClass('is_active');
});
</script>
<div class="row">
<div class="large-8 medium-8 columns">
<div class="markdown-body home-categories">
<div class="article">
<a class="clearlink" href="15054541063906.html">
<h1>01 - 基础知识</h1>
<div class="a-content">
<div class="a-content-text">
<ul>
<li>
<a href="#toc_0">Java概述</a>
<ul>
<li>
<a href="#toc_1">Java历史背景</a>
</li>
<li>
<a href="#toc_2">Java的三大平台:</a>
</li>
<li>
<a href="#toc_3">Java语言特性</a>
</li>
</ul>
</li>
<li>
<a href="#toc_4">Java开发环境配置</a>
<ul>
<li>
<a href="#toc_5">JDK提供开发环境支持</a>
</li>
<li>
<a href="#toc_6">环境变量的配置</a>
</li>
</ul>
</li>
<li>
<a href="#toc_7">Java编译运行机制</a>
</li>
</ul>
<h2 id="toc_0">Java概述</h2>
<h3 id="toc_1">Java历史背景</h3>
<ul>
<li><p>1982年，SUN(Stanford University Network)公司诞生于美国斯坦福大学校园，并于1986年上市。Java在NASDAQ（纳斯达克：是全美证券商协会自动报价系统）的标识为SUNW，2007年改为SUN。2009年4月20日19点40分，美国数据软件巨头甲骨文公司（Oracle）宣布以74亿美元收购SUN公司。</p></li>
<li><p>1995年5月，SUNW推出Java。它是Java面向对象程序设计语言和Java平台的总称。</p>
</div>
</div>
</a>
<div class="read-more clearfix">
<div class="more-left left">
<a href="15054541063906.html">Read more</a>
<span class="date">2017/9/15</span>
<span>posted in </span>
<span class="posted-in"><a href='JavaSE.html'>JavaSE</a></span>
</div>
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<span class="comments">
<a href="hobson.top/15054541063906.html#disqus_thread">comments</a>
<a class="ds-thread-count" data-thread-key="15054541063906.html" data-count-type="comments" href="15054541063906.html#ds-thread"></a>
</span>
</div>
</div>
</div><!-- article -->
<div class="article">
<a class="clearlink" href="15055422144925.html">
<h1>02 - 基本语法</h1>
<div class="a-content">
<div class="a-content-text">
<h2 id="toc_0"><mark>注意</mark></h2>
<ol>
<li>Java语言<strong>严格区分大小写</strong>，main和Main是完全不同的概念。</li>
<li>一个Java源文件里可以定义多个类，但其中最多<strong>只能有一个类被定义成<code>public</code>类</strong>。若源文件中包括了public类，<strong>源文件必须和该public类同名</strong>。</li>
<li>一个源文件中包含N个Java类时，成功编译后会生成N份字节码文件，即每个类都会生成一份单独的class文件，且字节码文件名和其对应的类名相同。</li>
<li>若一个类要运行，则必须拥有main方法,因为main方法是程序的入口.</li>
</ol>
</div>
</div>
</a>
<div class="read-more clearfix">
<div class="more-left left">
<a href="15055422144925.html">Read more</a>
<span class="date">2017/9/16</span>
<span>posted in </span>
<span class="posted-in"><a href='JavaSE.html'>JavaSE</a></span>
</div>
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<a href="hobson.top/15055422144925.html#disqus_thread">comments</a>
<a class="ds-thread-count" data-thread-key="15055422144925.html" data-count-type="comments" href="15055422144925.html#ds-thread"></a>
</span>
</div>
</div>
</div><!-- article -->
<div class="row">
<div class="large-6 columns">
<p class="text-left" style="padding-top:25px;">
</p>
</div>
<div class="large-6 columns">
<p class="text-right" style="padding-top:25px;">
</p>
</div>
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</div><!-- large 8 -->
<div class="large-4 medium-4 columns">
<div class="hide-for-small">
<div id="sidebar" class="sidebar">
<div id="site-info" class="site-info">
<h1>JavaSE</h1>
<div class="site-des"></div>
<div class="social">
<a target="_blank" class="github" target="_blank" href="chb4work@163.com" title="GitHub">GitHub</a>
<a target="_blank" class="rss" href="atom.xml" title="RSS">RSS</a>
</div>
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<h2>Categories</h2>
</div>
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<p class="cat-list">
<a href="JavaSE.html"><strong>JavaSE</strong></a>
</p>
</div>
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<div id="site-categories" class="side-item">
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<h2>Recent Posts</h2>
</div>
<div class="side-content">
<ul class="posts-list">
<li class="post">
<a href="15054541063906.html">01 - 基础知识</a>
</li>
<li class="post">
<a href="15055422144925.html">02 - 基本语法</a>
</li>
</ul>
</div>
</div>
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<p class="copyright">Copyright © 2015
Powered by <a target="_blank" href="http://www.mweb.im">MWeb</a>,
Theme used <a target="_blank" href="http://github.com">GitHub CSS</a>.</p>
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