Java Basit Lisans Kodu (Denendi.)

package ms.azreo.lisans;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection; 
import java.net.URL;



public class LisansKontrol {
 public static void main(String[] args) {
        String AnahtarKod = "lisans kodu";
        URLLisans(AnahtarKod);
    }

    private static void URLLisans(String AnahtarKod) {
        try {
            StringBuilder urlBuilder = new StringBuilder("Lisans Site URL");
            urlBuilder.append(AnahtarKod);
            URL url = new URL(urlBuilder.toString());
            HttpURLConnection con = (HttpURLConnection) url.openConnection();
            con.setRequestMethod("GET");

            int kodokuma = con.getkodokuma();
            System.out.println("Kod " + kodokuma);
            BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
            String yaziyicek;
            StringBuilder response = new StringBuilder();
            while ((yaziyicek = in.readLine()) != null) {
                response.append(yaziyicek);
            }
            in.close();

            String gericevap = response.toString();
            System.out.println("Cevap: " + gericevap);
            if (gericevap.equals("true")) {
                System.out.println("Lisans Geçerli.");
            } else {
                System.out.println("Lisans Geçersiz.");
                System.exit(0);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}