lookup.java

this gives details of the network programming

// Sample Jav Program
// Looks up the IP address for a hostname and prints it out
//

import java.net.*;	// need this for InetAddress

public class Lookup {

    static public void main(String args[]) {
	// lookup the address of each hostname found on the command line
	for (int i=0;i<args.length;i++) {
	    printAddress(args[i]);
	}
    }

    static void printAddress( String hostname ) {
	// use a try/catch to handle failed lookups
	try {

	    InetAddress a = InetAddress.getByName(hostname);
	    System.out.println(hostname + ":" + a.getHostAddress());

	} catch (UnknownHostException e) {

		System.out.println("No address found for " + hostname);
	}
    }
}