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+---
+title: nsLocalFile
+slug: Mozilla/Tech/XPCOM/Reference/Components/nsLocalFile
+tags:
+  - Components
+  - 'Components:Frozen'
+  - XPCOM
+  - XPCOM API Reference
+translation_of: Mozilla/Tech/XPCOM/Reference/Components/nsLocalFile
+---
+<p>« <a href="/ja/docs/XPCOM_API_Reference">XPCOM API Reference</a></p>
+
+<h3 id=".E8.A6.81.E7.B4.84" name=".E8.A6.81.E7.B4.84">要約</h3>
+
+<p><code><a href="ja/NsILocalFile">nsILocalFile</a></code> を実装するコンポーネント。</p>
+
+<dl>
+ <dt>Class ID</dt>
+ <dd><code>2e23e220-60be-11d3-8c4a-000064657374</code></dd>
+ <dt>ContractID</dt>
+ <dd><code>@mozilla.org/file/local;1</code></dd>
+</dl>
+
+<h3 id=".E3.82.B5.E3.83.9D.E3.83.BC.E3.83.88.E3.81.95.E3.82.8C.E3.81.9F.E3.82.A4.E3.83.B3.E3.82.BF.E3.83.95.E3.82.A7.E3.83.BC.E3.82.B9" name=".E3.82.B5.E3.83.9D.E3.83.BC.E3.83.88.E3.81.95.E3.82.8C.E3.81.9F.E3.82.A4.E3.83.B3.E3.82.BF.E3.83.95.E3.82.A7.E3.83.BC.E3.82.B9">サポートされたインタフェース</h3>
+
+<p><code><a href="ja/NsILocalFile">nsILocalFile</a></code>, <code><a href="ja/NsIFile">nsIFile</a></code></p>
+
+<h3 id=".E3.82.B3.E3.83.A1.E3.83.B3.E3.83.88" name=".E3.82.B3.E3.83.A1.E3.83.B3.E3.83.88">コメント</h3>
+
+<p>このコンポーネントは XPCOM コンポーネントマネージャを通してアクセスします。</p>
+
+<h3 id=".E3.82.B3.E3.83.BC.E3.83.89.E4.BE.8B" name=".E3.82.B3.E3.83.BC.E3.83.89.E4.BE.8B">コード例</h3>
+
+<pre>function getFileSize(path) {
+  var file =
+      Components.classes["@mozilla.org/file/local;1"].
+      createInstance(Components.interfaces.nsILocalFile);
+  file.initWithPath(path);
+  return file.fileSize;
+}
+</pre>