Client client = Client.create();
try {

        WebResource resource = client.resource("DIRECION")
                .queryParam("par", "val")
                .queryParam("par", "val");


         String respuesta = resource.get(String.class);

} catch (Exception e) {
                e.printStackTrace();
            }

#pragma comment(lib, "mpr.lib")

#include <stdafx.h>
    #include <windows.h>
    #include <iostream>
    #pragma comment(lib, "mpr.lib")
    using namespace std;

     
    int main()
    {
        char Name[255];
        char Test[255];
        DWORD size=255;
        if (WNetGetUser(Test,Name,&size)==NO_ERROR)
        {
            cout << Name << endl;
        }
        system("PAUSE");
        return EXIT_SUCCESS;
     
    }

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;

public class app{

   public static void main(String[] args){

    InetAddress ip;
    try {

        ip = InetAddress.getLocalHost();
        System.out.println("Current IP address : " + ip.getHostAddress());

        NetworkInterface network = NetworkInterface.getByInetAddress(ip);

        byte[] mac = network.getHardwareAddress();

        System.out.print("Current MAC address : ");

        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < mac.length; i++) {
            sb.append(String.format("%02X%s", mac[i], (i < mac.length - 1) ? "-" : ""));        
        }
        System.out.println(sb.toString());

    } catch (UnknownHostException e) {

        e.printStackTrace();

    } catch (SocketException e){

        e.printStackTrace();

    }

   }

}