OkHttpAsynchronous

import java.io.IOException;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

public class OkHttpAsynchronous {

    public static void main(String[] args) {

        // avoid creating several instances, should be singleton
        OkHttpClient client = new OkHttpClient();

        // creating a request object
        Request request = new Request.Builder()
                .url("https://api.quotable.io/random")
                .build();

        // asynchronous network call
        client.newCall(request).enqueue(new Callback() {

            @Override
            public void onFailure(Call call, IOException e) {
                e.printStackTrace();
            }

            @Override
            public void onResponse(Call call, final Response response) throws IOException {
                if (!response.isSuccessful()) {
                    throw new IOException("Unexpected code " + response);
                } else {
                    // receiving json body
                    System.out.println(response.body().string());
                }
            }

        });

    }

}