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                # 如何在 Java 中創建文件 > 原文: [https://beginnersbook.com/2014/01/how-to-create-a-file-in-java/](https://beginnersbook.com/2014/01/how-to-create-a-file-in-java/) 在本教程中,我們將了解如何使用`createNewFile()`方法在 Java 中創建文件。如果文件在指定位置不存在并且返回`true`,則此方法創建一個空文件。如果文件已存在,則此方法返回`false`。它拋出: [`IOException`](https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html) - 如果在創建文件期間發生輸入/輸出錯誤。 [`SecurityException`](https://docs.oracle.com/javase/7/docs/api/java/lang/SecurityException.html) - 如果存在安全管理器且其[`SecurityManager.checkWrite(java.lang.String)`](https://docs.oracle.com/javase/7/docs/api/java/lang/SecurityManager.html#checkWrite(java.lang.String))方法拒絕對該文件的寫訪問。 **完整代碼:** 下面的代碼將在 C 盤中創建一個名為`newfile.txt`的`txt`文件。您可以更改以下代碼中的路徑,以便在不同目錄或不同驅動器中創建文件。 ```java package beginnersbook.com; import java.io.File; import java.io.IOException; public class CreateFileDemo { public static void main( String[] args ) { try { File file = new File("C:\\newfile.txt"); /*If file gets created then the createNewFile() * method would return true or if the file is * already present it would return false */ boolean fvar = file.createNewFile(); if (fvar){ System.out.println("File has been created successfully"); } else{ System.out.println("File already present at the specified location"); } } catch (IOException e) { System.out.println("Exception Occurred:"); e.printStackTrace(); } } } ``` #### 參考: [Javadoc:`createNewFile()`](https://docs.oracle.com/javase/7/docs/api/java/io/File.html#createNewFile())
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