You may want to know whether an IP address is a multicast address or not in order to make a decision on how to proceed with it. Java supports this with the help of an API called isMulticastAddress().

import java.net.*;public class MulticastAddress {   public static void main(String args[])   {      MulticastAddress multicastAddress = new MulticastAddress();      multicastAddress.proceed();   }   private void proceed()    {      InetAddress addr = null;      String ipAddress = "224.0.0.5";      try{         //You can customize this by passing an argument and check for values in runtime         addr = InetAddress.getByName(ipAddress);      }catch(UnknownHostException uhe)      {         System.out.println("UnknownHostException: " + uhe);      }            //This method identifies if the given ipaddress is multicast address or not      if (addr.isMulticastAddress()) {         System.out.println(addr + " is multicast address.");      }      else      {         System.out.println(addr + " is not multicast address.");      }   }}/*

Expected output:

[root@mypc]# java MulticastAddress/224.0.0.5 is multicast address.*/