import java.net.InetAddress;
import java.net.UnknownHostException;

/*
 * Created on 2005/02/02
 *
 */

/**
 * @author Neil Lee
 *  
 */
public class BasicNetUtils {
    BasicNetUtils() {

    }

    String getHostName(String hostname) {
        String ipAddrStr = "";
        try {
            InetAddress addr = InetAddress.getByName(hostname);
            byte[] ipAddr = addr.getAddress();

            // Convert to dot representation

            for (int i = 0; i < ipAddr.length; i++) {
                if (i > 0) {
                    ipAddrStr += ".";
                }
                ipAddrStr += ipAddr[i] & 0xFF;
            }
        } catch (UnknownHostException e) {
        }
        return ipAddrStr;

    } //======================main(test)========================

    public static void main(String[] args) {
        BasicNetUtils basic = new BasicNetUtils();
       
        System.out.println(basic.getHostName("cjsdn.net"));
    }
}