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Java简介.html
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<div id='write' class = 'is-mac'><div class='md-toc' mdtype='toc'><p class="md-toc-content"><span class="md-toc-item md-toc-h2" data-ref="c6"><a class="md-toc-inner" style="" href="#header-c6">Java简介</a></span><span class="md-toc-item md-toc-h3" data-ref="c7"><a class="md-toc-inner" style="" href="#header-c7">1. 面向对象编程简介</a></span><span class="md-toc-item md-toc-h4" data-ref="c8"><a class="md-toc-inner" style="" href="#header-c8">三大基本特性</a></span><span class="md-toc-item md-toc-h4" data-ref="c19"><a class="md-toc-inner" style="" href="#header-c19">五大基本原则</a></span><span class="md-toc-item md-toc-h4" data-ref="c36"><a class="md-toc-inner" style="" href="#header-c36">面向对象编程与面向过程的区别</a></span><span class="md-toc-item md-toc-h3" data-ref="c41"><a class="md-toc-inner" style="" href="#header-c41">2. Java简介</a></span></p></div><h2><a name='header-c6' class='md-header-anchor '></a>Java简介</h2><h3><a name='header-c7' class='md-header-anchor '></a>1. 面向对象编程简介</h3><h4><a name='header-c8' class='md-header-anchor '></a>三大基本特性</h4><ol><li>封装性</li><li>继承性</li><li>多态性</li></ol><h4><a name='header-c19' class='md-header-anchor '></a>五大基本原则</h4><ol><li>单一职责原则</li><li>开放封闭原则</li><li>替换原则</li><li>依赖原则</li><li>借口分离原则</li></ol><h4><a name='header-c36' class='md-header-anchor '></a>面向对象编程与面向过程的区别</h4><p>设计一个方法,用于描述狼吃羊这个 事情,某只狼吃了某只羊,你可以面 向过程地吃,eat(狼A, 羊A),也可以 面向对象地吃,狼A.eat(羊A)</p><p><a href='http://www.cnblogs.com/loveyou999/p/4843758.html'>更多文章</a></p><h3><a name='header-c41' class='md-header-anchor '></a>2. Java简介</h3><p>1995年,SUN公司推出JAVA 是一款高级编程语言 2004年,JDK1.5发布(重要版本) 2009年,ORACLE公司收购SUN,取得了JAVA的版权目前,JAVA是应用最为广泛的计算机语言 JAVA重要特性-跨平台-(一次编译,到处运行) 原因:在编译后的文件和操作系统之间多了一层虚拟机 虚拟机:解释编译后文件并通知系统要执行哪些操作,充当中介功能</p><p></p><p></p></div>
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