Java Network Programming

ProtocolTester.java

import java.net.*;

public class ProtocolTester {
  public static void main(String[] args) {
    String url = "www.bl.ac.id";

    testProtocol("http://" + url);
    testProtocol("https://" + url);
    testProtocol("ftp://" + url);
    testProtocol("nfs://" + url);
    testProtocol("telnet://" + url);
    testProtocol("mailto:rizafahmi@gmail.com");


  }

  private static void testProtocol (String url) {
    try {
      URL u = new URL(url);
      System.out.println(u.getProtocol() + " is supported.");
    } catch (MalformedURLException e) {
      String protocol = url.substring(0, url.indexOf(":"));
      System.out.println(protocol + " is not supported");
    }
  }
}