In the past, when I studied Java through books or other videos, I just thought, "Oh, okay.." and moved on, and there were concepts that I didn't quite understand, and because of that, I kept getting confused. But after listening to Younghan's lecture, I now think, "Ah!.. So that's what it was.. So that's why it was like that!" I hope you give the next Java lecture soon. ㅜㅠ