RetrofitTest.java

/**
 *
 * @author kanishka
 */
public class RetrofitTest {

    public static void main(String[] args) throws IOException {
        OkHttpClient.Builder httpClient = new OkHttpClient.Builder();

        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl("https://abc.com")
                .addConverterFactory(GsonConverterFactory.create())
                .client(httpClient.build())
                .build();
        CategoryService categoryService = retrofit.create(CategoryService.class);
        Call<Category> c = categoryService.list();
        Response<Category> catR = c.execute();
        if(catR.isSuccessful()){
            System.out.println(catR.body().getId());
            System.out.println(catR.body().getName());
            System.out.println(catR.body().getTs());
        }
    }
}

interface CategoryService {
    @GET("reception/5cb948d5e6ba7798c5973ab4")
    Call<Category> list();
}