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<title>17. Commenter / IntelliJ Platform SDK DevGuide</title>
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<h1>17. Commenter</h1>
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<p>A commenter allows user to comment the code at the cursor or selected code automatically via <em>⌘/</em>.</p>
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<a name="define-a-commenter" class="elem-anchor"></a>
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<h3>17.1. Define a commenter<a href="#define-a-commenter" class="anchor-link"><span></span></a></h3>
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<pre><code class="code-block__wrapper code-block _highlighted lang_java"><span class="kn">package</span> <span class="n">com</span><span class="o">.</span><span class="na">simpleplugin</span><span class="o">;</span>
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<span class="kn">import</span> <span class="nn">com.intellij.lang.Commenter</span><span class="o">;</span>
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<span class="kn">import</span> <span class="nn">org.jetbrains.annotations.Nullable</span><span class="o">;</span>
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<span class="kd">public</span> <span class="kd">class</span> <span class="nc">SimpleCommenter</span> <span class="kd">implements</span> <span class="n">Commenter</span> <span class="o">{</span>
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<span class="nd">@Nullable</span>
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<span class="nd">@Override</span>
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<span class="kd">public</span> <span class="n">String</span> <span class="nf">getLineCommentPrefix</span><span class="o">()</span> <span class="o">{</span>
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<span class="k">return</span> <span class="s">"#"</span><span class="o">;</span>
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<span class="o">}</span>
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<span class="nd">@Nullable</span>
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<span class="nd">@Override</span>
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<span class="kd">public</span> <span class="n">String</span> <span class="nf">getBlockCommentPrefix</span><span class="o">()</span> <span class="o">{</span>
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<span class="k">return</span> <span class="s">""</span><span class="o">;</span>
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<span class="o">}</span>
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<span class="nd">@Nullable</span>
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<span class="nd">@Override</span>
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<span class="kd">public</span> <span class="n">String</span> <span class="nf">getBlockCommentSuffix</span><span class="o">()</span> <span class="o">{</span>
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<span class="k">return</span> <span class="kc">null</span><span class="o">;</span>
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<span class="o">}</span>
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<span class="nd">@Nullable</span>
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<span class="nd">@Override</span>
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<span class="kd">public</span> <span class="n">String</span> <span class="nf">getCommentedBlockCommentPrefix</span><span class="o">()</span> <span class="o">{</span>
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<span class="k">return</span> <span class="kc">null</span><span class="o">;</span>
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<span class="o">}</span>
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<span class="nd">@Nullable</span>
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<span class="nd">@Override</span>
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<span class="kd">public</span> <span class="n">String</span> <span class="nf">getCommentedBlockCommentSuffix</span><span class="o">()</span> <span class="o">{</span>
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<span class="k">return</span> <span class="kc">null</span><span class="o">;</span>
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<span class="o">}</span>
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<span class="o">}</span>
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</code></pre>
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<a name="register-the-commenter" class="elem-anchor"></a>
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<h3>17.2. Register the commenter<a href="#register-the-commenter" class="anchor-link"><span></span></a></h3>
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<pre><code class="code-block__wrapper code-block _highlighted lang_xml"><span class="nt"><lang.commenter</span> <span class="na">language=</span><span class="s">"Simple"</span> <span class="na">implementationClass=</span><span class="s">"com.simpleplugin.SimpleCommenter"</span><span class="nt">/></span>
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</code></pre>
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<a name="run-the-project" class="elem-anchor"></a>
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<h3>17.3. Run the project<a href="#run-the-project" class="anchor-link"><span></span></a></h3>
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<p><img src="img/commenter.png" alt="Commenter" /></p>
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<p><a href="code_style_settings.html"><span>Previous</span></a>
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<a href="quick_fix.html"><span>Next</span></a></p>
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<div class="last-modified">
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Last modified: 28 December 2015
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