Java tutorial
import java.net.InetAddress; public class Main { public static void main(String[] argv) throws Exception { InetAddress addr = InetAddress.getByName("java-tips.org"); byte[] ipAddr = addr.getAddress(); // Convert to dot representation String ipAddrStr = ""; for (int i = 0; i < ipAddr.length; i++) { if (i > 0) { ipAddrStr += "."; } ipAddrStr += ipAddr[i] & 0xFF; } } }