Generate Magnetic url from hash, JAVA code

magnet.java

 public String generateMagneticUrl(String hash,String movieName) throws UnsupportedEncodingException {
        //magnet:?xt=urn:btih:TORRENT_HASH&dn=Url+Encoded+Movie+Name&tr=http://track.one:1234/announce&tr=udp://track.two:80

        String baseString = "magnet:?xt=urn:btih:"+hash+"&dn=";
        String encodedMovieName = URLEncoder.encode(movieName, "utf-8").replace("+", "%20");
        baseString+=encodedMovieName;
        String tracker1 = "udp://open.demonii.com:1337/announce";
        String tracker2 = "udp://tracker.openbittorrent.com:80";
        String tracker3 = "udp://tracker.coppersurfer.tk:6969";
        String tracker4 = "udp://glotorrents.pw:6969/announce";
        String tracker5 = "udp://tracker.opentrackr.org:1337/announce";
        String tracker6 = "udp://torrent.gresille.org:80/announce";
        String tracker7 = "udp://p4p.arenabg.com:1337";
        String tracker8 = "udp://tracker.leechers-paradise.org:6969";

        String[] trackerArray = {tracker1,tracker2,tracker3,tracker4,tracker5,tracker6,tracker7,tracker8};
        String trackers ="";


        for (String trackerItem: trackerArray) {
            trackers+="&tr="+URLEncoder.encode(trackerItem, "utf-8").replace("+", "%20");
        }

        return baseString+trackers;

    }