Hello, Young-han. I've listened to the entire Intermediate Part 1. I don't know why Spring is visible in Java. (I've purchased the lectures for Advanced Part 2, but the curriculum feels like a buildup to Spring. Haha) Personally, I think I've learned a lot about exceptions and Enum from a practical perspective in this lecture. Of course, I've learned a lot from other parts as well, but I think I've learned even more from those two parts. And I need to deal with dates in the application I'm currently building, so I think I'll be able to proceed smoothly after gaining some confidence from this lecture. Thank you for making such a great lecture...!! (It was nice to see you briefly in the Toby Salon Open Chat. Hehe;;) I'll be back with another review next time. P.S. I don't know how I was selected as the main review for the 400,000th anniversary discount promotion, but thank you very much...^^