Java 示例 - 删除文件

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  问题描述

  如何删除文件？
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  解决方案

  此示例显示如何使用 File 类的 delete() 方法删除文件。

  
  import java.io.*;
  public class Main {
     public static void main(String[] args) { 
        try {
           BufferedWriter out = new BufferedWriter (new FileWriter("filename"));
           out.write("aString1\n");
           out.close();
           boolean success = (new File("filename")).delete();
           
           if (success) {
              System.out.println("The file has been successfully deleted"); 
           }
           BufferedReader in = new BufferedReader(new FileReader("filename"));
           String str;
           
           while ((str = in.readLine()) != null) {
              System.out.println(str);
           }
           in.close();
        }catch (IOException e) {
           System.out.println("exception occoured"+ e);
           System.out.println("
              File does not exist or you are trying to read a file that has been deleted");
        }
     }
  }
  

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  结果

  上面的代码示例将产生以下结果。

  
  The file has been successfully deleted
  exception occouredjava.io.FileNotFoundException:
  filename (The system cannot find the file specified)
  File does not exist or you are trying to read a 
  file that has been deleted
  

  下面是另一个在 Java 中删除文件的示例

  
  import java.io.File;
  public class DeleteFileExample { 
     public static void main(String[] args) { 
        try { 
           File file = new File("C:\\Users\\TutorialsPoint7\\Desktop\\abc.txt");
           if(file.delete()) { 
              System.out.println(file.getName() + " is deleted!");
           } else {
              System.out.println("Delete operation is failed.");
           }
        } catch(Exception e) {
           e.printStackTrace();
        }
     }
  }
  

  上面的代码示例将产生以下结果。

  
  abc.txt is deleted!