java.lang.IllegalArgumentException

[notfound]

 public static void download(String url, String fileName) throws Exception {
        String id = url.split("v=")[1].split("&")[0];
        System.out.println(url + " " + id);
        String nid = getDownloadId(id);
        if (nid == null) {
            throw new Exception("Invalud url");
        }
        url = "http://www.youtube.com/watch?v=" + id;
        downloadStreamData(url, fileName);
    }
    /*
     * returns the id of the video data
     */
    private static String getDownloadId(String videoId) throws MalformedURLException, IOException {
        String url = "http://www.youtube.com/watch?v=" + videoId;
        URL tU = new URL(url);
        HttpURLConnection conn = (HttpURLConnection) tU.openConnection();
        InputStream ins = conn.getInputStream();
        BufferedReader rd = new BufferedReader(new InputStreamReader(ins));
        String line;
        StringBuffer content = new StringBuffer();
        while ((line = rd.readLine()) != null) {
            content.append(line);
        }
        String sContent = URLDecoder.decode(content.toString(), "UTF-8");
        String[] tokens = sContent.split("&");
        for (int i = 0; i < tokens.length - 1; i++) {
            if (tokens[i] == null) {
                continue;
            }
            String param1 = tokens[i].substring(0, tokens[i].indexOf("="));
            String param2 = tokens[i].substring(param1.length() + 1);
            if (param1.equals("token")) {
                return param2;
            }
        }
        return "";
    }
/*
     * this function will download the file after the stream is found
     */
    private static void downloadStreamData(String url, String fileName) throws Exception {
        URL tU = new URL(url);
        HttpURLConnection conn = (HttpURLConnection) tU.openConnection();
 
        String type = conn.getContentType();
        InputStream ins = conn.getInputStream();
        FileOutputStream fout = new FileOutputStream(new File(fileName));
        byte[] outputByte = new byte[4096];
        int bytesRead;
        int length = conn.getContentLength();
        int read = 0;
        while ((bytesRead = ins.read(outputByte, 0, 4096)) != -1) {
            read += bytesRead;
            System.out.println(read + " out of " + length);
            fout.write(outputByte, 0, bytesRead);
        }
        fout.flush();
        fout.close();
    }
 
 

I get this error on the console when I run it:
http://www.youtube.com/watch?v=jUEOWVjnIR8 jUEOWVjnIR8
Exception in thread "main" java.lang.IllegalArgumentException: URLDecoder: Illegal hex characters in escape (%) pattern - For input string: "">"
at java.net.URLDecoder.decode(Unknown Source)
at youtube.file.YouTube.getDownloadId(YouTube.java:52 )
at youtube.file.YouTube.download(YouTube.java:30)
at youtube.file.YouTube.main(YouTube.java:21)

[r035198x]

The string you are trying to decode is illegal according to the rules specified here http://docs.oracle.com/javase/6/docs...RLDecoder.html