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02 - 基本语法 - JavaSE
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<h1>02 - 基本语法</h1>
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<span class="date">2017/9/16</span>
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<h2 id="toc_0"><mark>注意</mark></h2>
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<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>
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<li>一个Java源文件<strong>只定义一个类</strong>,不同的类使用不同的源文件定义;</li>
<li>将每个源文件中单独定义的类都定义成<code>public</code>的，保持<strong>文件名与类名一致</strong>;</li>
<li>定义一个<strong>主类</strong>，放<strong>main函数</strong>，用来测试运行。<strong>不要把main函数写在普通类里面</strong>。</li>
<li>平时学习时，在普通类里面定义main方法，是为了方便测试，开发时不会这样用。</li>
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