java - Unable to Access files in Directory -


i have directory structure follows:

db_set  -d1    - db_1.txt  -d2    - db_2.txt   -d3    - db_3.txt  -d4    - db_4.txt  -d5    - db_5.txt

i want store db_1.txt, db_2.txt, db_3.txt, db_4.txt, db_5.txt in arraylist. how can this? partial code:

file folder = new file("./webcontent/datasets/db_set/"); file[] listoffiles = folder.listfiles(); system.out.println("listoffiles: "+listoffiles); arraylist<file> sub_dir = new arraylist<file>(); (int = 0; < listoffiles.length; i++) {     if (listoffiles[i].isfile()) {         system.out.println("file " + listoffiles[i].getname());       }     else if (listoffiles[i].isdirectory()) {         sub_dir.add(listoffiles[i]);     } }

you need go 2 levels deep.

        file folder = new file("./webcontent/datasets/db_set/");         file[] listofsubdirectories = folder.listfiles(new filefilter() {             @override             public boolean accept(file file) {                 return file.isdirectory();             }         });         arraylist<file> fileslist = new arraylist<file>();         (file dir : listofsubdirectories) {             file[] files = dir.listfiles(new filefilter() {                 @override                 public boolean accept(file file) {                     return file.isfile();                 }             });              (file f : files) {                 fileslist.add(f);                    }         }

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