How to get external IP successfully

Question

After reading: Getting the 'external' IP address in Java

code:

public static void main(String[] args) throws IOException
{
    URL whatismyip         


        

Answer 1

    public static void main(String[] args) throws IOException 
    {
    URL connection = new URL("http://checkip.amazonaws.com/");
    URLConnection con = connection.openConnection();
    String str = null;
    BufferedReader reader = new BufferedReader(new InputStreamReader(con.getInputStream()));
    str = reader.readLine();
    System.out.println(str);
     }