Newgrounds Audio Portal downloader

package ng.dl;

import java.io.*;
import java.net.*;
import java.util.ArrayList;
import java.util.regex.*;

public class ngdl {

    public static void main(String[] args) throws Exception {

        if (args.length != 1) System.out.println("Indiquez le pseudo de l'artiste à télécharger. par exemple, pour http://paragonx9.newgrounds.com/ il faut entrer 'paragonx9'.\nExemple d'utilisation : >java ngdl paragonx9");
        else {

            ArrayList<String> links = new ArrayList<String>();
            ArrayList<String> titles = new ArrayList<String>();

            // on récupère le code source de la page
            System.out.println("Recuperation du code source de la page...");
            String src = getSourceCode("http://"+args[0]+".newgrounds.com/audio/");
            System.out.println("Code source récupéré.");

            // on récupère le nom de l'artiste (titre de la page)
            String artistName = "Unknown Artist";
            Pattern p0 = Pattern.compile("<title>.+'s Audio</title>");
            Matcher matcher0 = p0.matcher(src);
            matcher0.find();
            artistName = matcher0.group().replace("<title>","").replace("'s Audio</title>","");
            System.out.println("Nom de l'artiste : "+artistName);

            // on récupère les liens des fichiers audio à télécharger
            Pattern p = Pattern.compile("<a class=\"feature\" href=\"http://www.newgrounds.com/audio/listen/[0-9]+\">");
            Matcher matcher = p.matcher(src);
            while (matcher.find()) {
                String dlLink = matcher.group().replace("<a class=\"feature\" href=\"", "").replace("\">","").replace("listen","download");
                links.add(dlLink);
                //System.out.println("lien trouve : "+dlLink);
            }

            // on récupère les titres des fichiers audio à télécharger
            Pattern p2 = Pattern.compile("<span class=\"ftitle\">[^<]+</span>");
            Matcher matcher2 = p2.matcher(src);
            while (matcher2.find()) {
                String songName = matcher2.group().replace("<span class=\"ftitle\">","").replace("</span>", "");
                titles.add(songName);
                //System.out.println("titre trouve : "+songName);
            }

            System.out.println("Nb liens : "+links.size()+"\nNb titres : "+titles.size());

            for (int i = 0; i < links.size(); i++) {
                String fn = artistName+" - "+titles.get(i).split("- ")[titles.get(i).split("- ").length-1];
                fn = fn.replace("\\", "").replace("/", "").replace(":", "").replace("*", "").replace("<", "").replace(">", "").replace("|", "");
                System.out.println("Chanson "+(i+1)+"/"+links.size()+" : "+fn);
                if (!new File("Newgrounds Audio Portal/"+artistName+"/").exists()) {
                    new File("Newgrounds Audio Portal/"+artistName+"/").mkdirs();
                }
                String filePath = "Newgrounds Audio Portal/"+artistName+"/"+fn+".mp3";
                saveFileFromURL(links.get(i), filePath);
            }
        }

    }

    public static void saveFileFromURL(String url_to_file, String path_of_file)
    {
        InputStream input = null;
        FileOutputStream writeFile = null;

        try
        {
            URL url = new URL(url_to_file);
            URLConnection connection = url.openConnection();
            int fileLength = connection.getContentLength();

            if (fileLength == -1) {
                System.out.println("Invalide URL or file.");
            } else {

                System.out.println("DL : "+url_to_file);
                input = connection.getInputStream();
                String fileName = path_of_file;
                writeFile = new FileOutputStream(fileName);
                byte[] buffer = new byte[1024];
                int read;

                while ((read = input.read(buffer)) > 0)
                    writeFile.write(buffer, 0, read);
                writeFile.flush();

                System.out.println("OK : "+fileName+"\n------------------------------------------");

            }
        }
        catch (IOException e)
        {
            System.out.println("Error while trying to download the file.");
            e.printStackTrace();
        }
        finally
        {
            try
            {
                writeFile.close();
                input.close();
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
        }
    }

    public static String getSourceCode(String url) throws IOException {

        URL oracle = new URL(url);
        BufferedReader in = new BufferedReader(new InputStreamReader(oracle.openStream()));

        String inputLine, ret = "";

        while ((inputLine = in.readLine()) != null) ret += inputLine;

        in.close();

        return ret;

    }
}