arrays - How to get number of files in a directory and subdirectory from a path in java? -

i have foldername.txt file has list of folders path. how can total count of total number of files present inside folder path.

for 1 path i'm able this.

new file("folder").listfiles().length. 

but problems i'm not able read path foldername.txt file .

i'm trying

file objfile = objpath.tofile();      try(bufferedreader in = new bufferedreader(                              new filereader(objfile))){           string line = in.readline();             while(line != null){              string[] linesfile = line.split("\n"); 

but when i'm trying access linesfile array i'm getting exception. linesfile[1] exception in thread "main" java.lang.arrayindexoutofboundsexception:.

my question why i'm getting java.lang.arrayindexoutofboundsexception ?. , how read individual directory path , total number of files inside it. there way read total number of files in subdirectory too.

foldername.txt has structure this.

e:/folder1

e:/folder2

exception because :

readline() method reads entire line input removes newline characters it.so it's unable split around \n

here code want,.

i have folderpath.txt has list of directory this.

d:\305

d:\deployment

d:\heapdumps

d:\program files

d:\programming

this code gives want + can modify according need

public class main {  public static void main(string args[]) throws ioexception {      list<string> folderspath = new arraylist<string>();     file folderpathfile = new file("c:\\users\\ankur\\desktop\\folderpath.txt");      /**      * read folderpath.txt , path , store      * folderspath list      */     bufferedreader reader = new bufferedreader(new filereader(folderpathfile));     string line = reader.readline();     while(line != null){         folderspath.add(line);         line = reader.readline();     }     reader.close();      /**      * map path(i.e folder) total no of       * files present in path (i.e folder)      */     map<string, integer> nooffilesinfolder = new hashmap<string, integer>();     (string pathoffolder:folderspath){         file[] files2 = new file(pathoffolder).listfiles();//get arrays of files         int totalfilescount = files2.length;//get total no of files present         nooffilesinfolder.put(pathoffolder,totalfilescount);     }      system.out.println(nooffilesinfolder); }  } 

output:

{d:\program files=1, d:\heapdumps=16, d:\deployment=48, d:\305=4, d:\programming=13}

edit : counts total number of files present inside subdirectory too.

/**this counts          * total number of files present inside subdirectory too.          */         map<string, integer> nooffilesinfolder = new hashmap<string, integer>();         (string pathoffolder:folderspath){             int filescount = 0;             file[] files2 = new file(pathoffolder).listfiles();//get arrays of files             (file f2 : files2){                 if (f2.isdirectory()){                     filescount += new file(f2.tostring()).listfiles().length;                  }                 else{                     filescount++;                 }             }             system.out.println(filescount);             nooffilesinfolder.put(pathoffolder, filescount);         }          system.out.println(nooffilesinfolder);     }