3、IntelliJ IDEA 之 HelloWorld 的实现
<h2 id="31新建工程">3.1、新建工程</h2><p><img src="https://img2024.cnblogs.com/blog/2052479/202603/2052479-20260306160852363-278893046.png" alt="图片" loading="lazy"></p>
<p>如上图所示，在欢迎界面点击“新建项目”按钮。</p>
<p><img src="https://img2024.cnblogs.com/blog/2052479/202603/2052479-20260306162942434-813573119.png" alt="图片" loading="lazy"></p>
<p>如上图所示，设置新项目的编程语言、名称、位置以及 JDK 版本；然后点击“创建”按钮即可新建一个工程。</p>
<blockquote>
<p>注意：JDK 需要事先安装好，具体请参考 OracleJDK的下载安装与配置 。</p>
</blockquote>
<blockquote>
<p>提示：新建第一个工程后，会自动激活旗舰版的试用订阅；为验证社区版的功能范围，本文主动停用订阅。<br>
<img src="https://img2024.cnblogs.com/blog/2052479/202603/2052479-20260306163446757-335744830.png" alt="图片" loading="lazy"></p>
</blockquote>
<h2 id="32编写代码">3.2、编写代码</h2>
<h3 id="321示例类">3.2.1、示例类</h3>
<p><img src="https://img2024.cnblogs.com/blog/2052479/202603/2052479-20260306165928464-1478504014.png" alt="图片" loading="lazy"></p>
<p>如上图所示，新建工程后，会自动创建一个示例类，示例类中有示例代码；不需要的，右击菜单删掉即可。</p>
<h3 id="322新建包">3.2.2、新建包</h3>
<p><img src="https://img2024.cnblogs.com/blog/2052479/202603/2052479-20260306170127168-1474338013.png" alt="图片" loading="lazy"></p>
<p><img src="https://img2024.cnblogs.com/blog/2052479/202603/2052479-20260306170217448-1919744011.png" alt="图片" loading="lazy"></p>
<p><img src="https://img2024.cnblogs.com/blog/2052479/202603/2052479-20260306170247485-1437280517.png" alt="图片" loading="lazy"></p>
<h3 id="323新建java类">3.2.3、新建Java类</h3>
<p><img src="https://img2024.cnblogs.com/blog/2052479/202603/2052479-20260306170427734-473035210.png" alt="图片" loading="lazy"></p>
<p><img src="https://img2024.cnblogs.com/blog/2052479/202603/2052479-20260306170516129-1261299872.png" alt="图片" loading="lazy"></p>
<p><img src="https://img2024.cnblogs.com/blog/2052479/202603/2052479-20260306170625544-1722568240.png" alt="图片" loading="lazy"></p>
<pre><code>package online.liaojy.idea;
public class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello，World");
}
}
</code></pre>
<h2 id="33运行程序">3.3、运行程序</h2>
<p><img src="https://img2024.cnblogs.com/blog/2052479/202603/2052479-20260306171101809-82698049.png" alt="图片" loading="lazy"></p>
<p>如上图所示，点击代码左侧的运行图标，即可看到运行结果。</p>
</div>
<div id="MySignature" role="contentinfo">
<p>本文来自博客园，作者：Javaer1995，转载请注明原文链接：https://www.cnblogs.com/Javaer1995/p/19679270</p><br><br>
来源：https://www.cnblogs.com/Javaer1995/p/19679270
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