Java如何刪除檔案？

在java程式設計中，如何刪除檔案？

此範例顯示如何使用File類的delete()方法刪除檔案。

package com.yiibai;

import java.io.*;

public class DeleteFile {
    public static void main(String[] args) { 
     String filename  = "be-delete-file.txt";
      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");
      }
   }
}

執行上述範例程式碼，將產生以下結果 -

The file has been successfully deleted
exception occouredjava.io.FileNotFoundException: be-delete-file.txt (系統找不到指定的檔案。)
File does not exist or you are trying to read a file that has been deleted

範例-2

以下是刪除一個檔案的另一個範例。

package com.yiibai;

import java.io.File;

public class DeleteFile2 {
    public static void main(String[] args) {
        try {
            File file = new File("F:/worksp/javaexamples/java_files/afile.txt");
            if (file.delete()) {
                System.out.println(file.getName() + " is deleted!");
            } else {
                System.out.println("Delete operation is failed.");
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

執行上述範例程式碼，將產生以下結果 -

afile.txt is deleted!