import java.lang.reflect.Method;

class Valami {
    private void sayHello() {
        System.out.println("Helló reflexió!");
    }
}

public class App {
  public static void main(String args[]) throws Exception {
    Valami obj = new Valami();
    Method method = Valami.class.getDeclaredMethod("sayHello");
    method.setAccessible(true);
    method.invoke(obj);
  }
}