Read Image Metadata from single file with Java -

i want read image metadata single file. tried following code:

http://johnbokma.com/java/obtaining-image-metadata.html

when run it, build successful nothing happens.

public class metadata {      public static void main(string[] args) {         metadata meta = new metadata();         int length = args.length;         ( int = 0; < length; i++ )         meta.readanddisplaymetadata( args[i] );     }      void readanddisplaymetadata( string filename ) {         try {              file file = new file( filename );             imageinputstream iis = imageio.createimageinputstream(file);             iterator<imagereader> readers = imageio.getimagereaders(iis);              if (readers.hasnext()) {                  // pick first available imagereader                 imagereader reader = readers.next();                  // attach source reader                 reader.setinput(iis, true);                  // read metadata of first image                 iiometadata metadata = reader.getimagemetadata(0);                  string[] names = metadata.getmetadataformatnames();                 int length = names.length;                 (int = 0; < length; i++) {                     system.out.println( "format name: " + names[ ] );                     displaymetadata(metadata.getastree(names[i]));                 }             }         }         catch (exception e) {             e.printstacktrace();         }     }  } 

please :)

you haven't specified path file correctly. change below should indicate this!

public static void main(string[] args) {     metadata meta = new metadata();     int length = args.length;     ( int = 0; < length; i++ ) {         if (new file(args[i]).exists()) {             meta.readanddisplaymetadata( args[i] );         } else {             system.out.println("cannot find file: " + args[i]);         }     } } 

edit - simpler code example

we statically defining file use.

public static void main(string[] args) {     metadata meta = new metadata();     string filename = "c:\\users\\luckheart\\pictures\\sample pictures\\koala.jpg";     if (new file(filename).exists()) {         meta.readanddisplaymetadata(filename);     } else {         system.out.println("cannot find file: " + filename);     } }