<div id="readability-page-1" class="page"><div>
    
    <article>
        <ul id="markdown-toc">
  <li><a href="#요약" id="markdown-toc-요약">요약</a></li>
  <li><a href="#checkstyle의-수식어-순서-경고" id="markdown-toc-checkstyle의-수식어-순서-경고">checkstyle의 수식어 순서 경고</a></li>
  <li><a href="#jls를-찾아보자" id="markdown-toc-jls를-찾아보자">JLS를 찾아보자</a></li>
</ul>

<h2 id="요약">요약</h2>

<p>Java Language Specification에서 권장하는 키워드 정렬 순서는 다음과 같다.</p>

<ol>
  <li><code>Annotations</code></li>
  <li><code>public</code></li>
  <li><code>protected</code></li>
  <li><code>private</code></li>
  <li><code>abstract</code></li>
  <li><code>static</code></li>
  <li><code>final</code></li>
  <li><code>transient</code></li>
  <li><code>volatile</code></li>
  <li><code>synchronized</code></li>
  <li><code>native</code></li>
  <li><code>strictfp</code></li>
</ol>

<h2 id="checkstyle의-수식어-순서-경고">checkstyle의 수식어 순서 경고</h2>

<p>다음과 같은 메소드를 작성했다고 하자.</p>

<div><pre><code><span>//                 ↓ 여기에 경고</span>
<span>final</span> <span>synchronized</span> <span>protected</span> <span>void</span> <span>hello</span><span>()</span> <span>{</span>
  <span>System</span><span>.</span><span>out</span><span>.</span><span>println</span><span>(</span><span>"Hello, World!"</span><span>);</span>
<span>}</span>
</code></pre></div>

<p>그리고 checkstyle을 돌려보면 다음과 같이 <code>protected</code>가 JLS에서 권장하는 modifier 순서에 맞지 않는다는 경고를 띄운다. (<a href="https://github.com/checkstyle/checkstyle/blob/master/src/main/resources/google_checks.xml">google_checks 사용</a>)</p>

<div><pre><code>'protected' modifier out of order with the JLS suggestions.
</code></pre></div>

<h2 id="jls를-찾아보자">JLS를 찾아보자</h2>

<p>JLS는 "Java Language Specification"을 의미한다. 여기에서 봐야 하는 곳은 8.1.1, 8.3.1, 8.4.3 절이다.</p>

<blockquote>

  <p><a href="https://docs.oracle.com/javase/specs/jls/se8/html/jls-8.html#jls-8.1.1"><strong>8.1.1. Class Modifiers</strong></a></p>

  <p>A class declaration may include class modifiers.</p>

  <div><pre><code>ClassModifier:
  (one of)
  Annotation public protected private
  abstract static final strictfp
</code></pre></div>
</blockquote>

<blockquote>

  <p><a href="https://docs.oracle.com/javase/specs/jls/se8/html/jls-8.html#jls-8.3.1"><strong>8.3.1. Field Modifiers</strong></a></p>

  <div><pre><code>FieldModifier:
  (one of)
  Annotation public protected private
  static final transient volatile
</code></pre></div>
</blockquote>

<blockquote>

  <p><a href="https://docs.oracle.com/javase/specs/jls/se8/html/jls-8.html#jls-8.4.3"><strong>8.4.3. Method Modifiers</strong></a></p>

  <div><pre><code>MethodModifier:
  (one of)
  Annotation public protected private
  abstract static final synchronized native strictfp
</code></pre></div>
</blockquote>

<p>모두 조합해보면 다음과 같이 정리할 수 있다.</p>

<p><code>Annotations</code>, <code>public</code>, <code>protected</code>, <code>private</code>, <code>abstract</code>, <code>static</code>, <code>final</code>, <code>transient</code>, <code>volatile</code>, <code>synchronized</code>, <code>native</code>, <code>strictfp</code></p>


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Java 키워드 정렬 순서

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