File Directory listing in Java | Java Example

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File dir = new File("directoryName");   String[] children = dir.list();   if (children == null) {       // Either dir does not exist or is not a directory   } else {       for (int i=0; i < children.length; i++) {           // Get filename of file or directory           String filename = children[i];       }   }     // It is also possible to filter the list of returned files.   // This example does not return any files that start with `.'.   FilenameFilter filter = new FilenameFilter() {       public boolean accept(File dir, String name) {           return !name.startsWith(".");       }   };   children = dir.list(filter);     // The list of files can also be retrieved as File objects   File[] files = dir.listFiles();     // This filter only returns directories   FileFilter fileFilter = new FileFilter() {       public boolean accept(File file) {           return file.isDirectory();       }   };   files = dir.listFiles(fileFilter);