IP detective

public String getIp() {
    URL whatismyip = null;
    BufferedReader in = null;
    try {
        whatismyip = new URL("http://checkip.amazonaws.com");
        in = new BufferedReader(new InputStreamReader(
                whatismyip.openStream()));
        String ip = in.readLine();
        return ip;
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (in != null) {
            try {
                in.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    return null;
}