» » How to Delete folder and subfolders using Java 8

  • How to delete folder with all files and sub folders in it using java 8.
  • We can use java 8 Stream to delete folder recursively 
  • Files.walk(rootPath, FileVisitOption.FOLLOW_LINKS)
  • .sorted(Comparator.reverseOrder())
  • .map(Path::toFile)
  • .peek(System.out::println)
  • .forEach(File::delete);

  1. Files.walk -  this method return all files/directories below the parent folder
  2. .sorted - sort the list in reverse order, so the folder itself comes after the including subfolders and files
  3. .map - map the file path to file
  4. .peek - points to processed entry
  5. .forEach - on every File object calls the .delete() method 




#1: Java Example program to delete folders and subfolders using java 8 stream

  1. package com.instanceofjava;

  2. import java.io.File;
  3. import java.io.IOException;
  4. import java.nio.file.FileVisitOption;
  5. import java.nio.file.Files;
  6. import java.nio.file.Path;
  7. import java.nio.file.Paths;
  8. import java.util.Comparator;
  9. /**
  10.  * @author www.Instanceofjava.com
  11.  * @category interview questions
  12.  * 
  13.  * Description: delete folders and sub folders using java 8
  14.  *
  15.  */

  16. public class DeleteFolder {

  17. public static void main(String[] args) {
  18. Path rootPath = Paths.get("C:\\Users\\Saidesh kilaru\\Desktop\\folder1");
  19. try {
  20. Files.walk(rootPath, FileVisitOption.FOLLOW_LINKS)
  21.     .sorted(Comparator.reverseOrder())
  22.     .map(Path::toFile)
  23.     .peek(System.out::println)
  24.     .forEach(File::delete);
  25. } catch (IOException e) {
  26. e.printStackTrace();
  27. }
  28. }

  29. }

Output:

  1. C:\Users\Saidesh kilaru\Desktop\folder1\subfolder\file2 in sub folder.docx
  2. C:\Users\Saidesh kilaru\Desktop\folder1\subfolder
  3. C:\Users\Saidesh kilaru\Desktop\folder1\file1.docx
  4. C:\Users\Saidesh kilaru\Desktop\folder1



Instance Of Java

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