deleting folder from java

Question

In Java  I want to delete all the contents that are present in a folder which includes files and folders    public void startDeleting String path            List lt String gt  filesList   new ArrayList lt String gt             List lt String gt  folderList   new ArrayList lt String gt             fetchCompleteList filesList  folderList  path           for String filePath   filesList                File tempFile   new File filePath               tempFile delete                      for String filePath   folderList                File tempFile   new File filePath               tempFile delete                     private void fetchCompleteList List lt String gt  filesList       List lt String gt  folderList  String path        File file   new File path       File   listOfFile   file listFiles        for File tempFile   listOfFile            if tempFile isDirectory                  folderList add tempFile getAbsolutePath                 fetchCompleteList filesList                   folderList  tempFile getAbsolutePath               else               filesList add tempFile getAbsolutePath                           This code does not work  what is the best way to do this

User · Answer

It could be problem with nested folders  Your code deletes the folders in the order they were found  which is top-down  which does not work  It might work if you reverse the folder list first   But I would recommend you just use a library like Commons IO for this

User · Answer

It will delete a folder recursively   public static void folderdel String path       File f  new File path       if f exists             String   list  f list            if list length  0               if f delete                     System out println  folder deleted                    return                                  else               for int i 0  i lt list length  i                     File f1  new File path      list i                    if f1 isFile   amp  amp  f1 exists                         f1 delete                                      if f1 isDirectory                         folderdel    f1                                               folderdel path

User · Answer

I found this piece of code more understadable and working   public static boolean deleteDir File dir        if  dir isDirectory              String   children   dir list            for  int i   0  i  lt  children length  i                  boolean success   deleteDir new File dir  children i                 if   success                    return false                                     return dir delete       The directory is empty now and can be deleted

User · Answer

The javadoc for File delete       public boolean delete        Deletes the file or directory denoted by this abstract pathname  If this pathname  denotes a directory  then the directory must be empty in order to be deleted     So a folder has to be empty or deleting it will fail  Your code currently fills the folder list with the top most folder first  followed by its sub folders  Since you iterrate through the list in the same way it will try to delete the top most folder before deleting its subfolders  this will fail   Changing these line      for String filePath   folderList            File tempFile   new File filePath           tempFile delete            to this      for int i   folderList size  -1 i gt  0 i--            File tempFile   new File folderList get i            tempFile delete            should cause your code to delete the sub folders first    The delete operation also returns false when it fails  so you can check this value to do some error handling if necessary

User · Answer

I have something like this    public static boolean deleteDirectory File directory        if directory exists             File   files   directory listFiles            if null  files               for int i 0  i lt files length  i                      if files i  isDirectory                          deleteDirectory files i                                      else                       files i  delete                                                        return directory delete

User · Answer

You should delete the file in the folder first   then the folder This way you will recursively call the method

User · Answer

I wrote a method for this sometime back  It deletes the specified directory and returns true if the directory deletion was successful          Delets a dir recursively deleting anything inside it      param dir The dir to delete     return true if the dir was successfully deleted     public static boolean deleteDirectory File dir        if   dir exists       dir isDirectory                 return false             String   files   dir list        for int i   0  len   files length  i  lt  len  i                 File f   new File dir  files i            if f isDirectory                  deleteDirectory f            else                 f delete                        return dir delete

User · Answer

You re storing all  sub-  files and folder recursively in a list  but with your current code you store the parent folder before you store the children  And so you try to delete the folder before it is empty  Try this code      if tempFile isDirectory                 children first         fetchCompleteList filesList  folderList  tempFile getAbsolutePath                parent folder last         folderList add tempFile getAbsolutePath

User · Answer

Using the FileUtils deleteDirectory   method can help to simplify the process of deleting directory and everything below it recursively   Check this question

User · Answer

Try this     public static boolean deleteDir File dir        if  dir isDirectory              String   children   dir list         for  int i 0  i lt children length  i          return deleteDir new File dir  children i                 The directory is now empty or this is a file so delete it    return dir delete

User · Answer

If you use Apache Commons IO it s a one-liner   FileUtils deleteDirectory dir     See FileUtils deleteDirectory       Guava used to support similar functionality   Files deleteRecursively dir      This has been removed from Guava several releases ago     While the above version is very simple  it is also pretty dangerous  as it makes a lot of assumptions without telling you  So while it may be safe in most cases  I prefer the  official way  to do it  since Java 7    public static void deleteFileOrFolder final Path path  throws IOException     Files walkFileTree path  new SimpleFileVisitor lt Path gt          Override public FileVisitResult visitFile final Path file  final BasicFileAttributes attrs        throws IOException         Files delete file         return CONTINUE              Override public FileVisitResult visitFileFailed final Path file  final IOException e          return handleException e              private FileVisitResult handleException final IOException e          e printStackTrace       replace with more robust error handling       return TERMINATE              Override public FileVisitResult postVisitDirectory final Path dir  final IOException e        throws IOException         if e  null return handleException e         Files delete dir         return CONTINUE

[java] deleting folder from java

Examples related to java

Examples related to file

Examples related to directory