list all files in the folder and also sub folders

Question

Possible Duplicate    List all files from a directory recursively with Java       How can i return a file array that include all files on the folder and also sub folders my method just work for folder and it doesn t include sub folders    public File   listf String directoryName                         list file     File directory   new File directoryName           get all the files from a directory     File   fList   directory listFiles         for  File file   fList            if  file isFile                  System out println file getAbsolutePath               else if  file isDirectory                  listf file getAbsolutePath                         System out println fList       return fList

User · Answer

You can return a List instead of an array and things gets much simpler       public static List lt File gt  listf String directoryName            File directory   new File directoryName            List lt File gt  resultList   new ArrayList lt File gt                 get all the files from a directory         File   fList   directory listFiles            resultList addAll Arrays asList fList            for  File file   fList                if  file isFile                      System out println file getAbsolutePath                   else if  file isDirectory                      resultList addAll listf file getAbsolutePath                                        System out println fList           return resultList

User · Answer

Using you current code  make this tweak   public void listf String directoryName  List lt File gt  files        File directory   new File directoryName           Get all files from a directory      File   fList   directory listFiles        if fList    null          for  File file   fList                      if  file isFile                      files add file                 else if  file isDirectory                      listf file getAbsolutePath    files

User · Answer

Use FileUtils from Apache commons   listFiles  public static Collection lt File gt  listFiles File directory                                           String   extensions                                           boolean recursive  Finds files within a given directory  and optionally its subdirectories  which match an array of extensions  Parameters  directory - the directory to search in extensions - an array of extensions  ex    java   xml    If this parameter is null  all files are returned  recursive - if true all subdirectories are searched as well Returns  an collection of java io File with the matching files

[java] list all files in the folder and also sub folders

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