public class Main {
public static void main(String[] args) {
    try {
        java.net.InetAddress ip = java.net.InetAddress.getLocalHost();
        System.out.println("Your current IP address : " + ip);
        String hostname = ip.getHostName();
        System.out.println("Your current Hostname : " + hostname);
    }
    catch(java.net.UnknownHostException e) {
        e.printStackTrace();
    }
}
}