Thank you for listening to me diligently, Sangwon Han :) Since you are an intermediate level, it will be helpful if you review it once while organizing it. When I first prepared the Java lecture, I was worried about whether it would be better to simply explain the grammar thinly and broadly? Or should I prepare the lecture in depth, including the content necessary for practical work? If it is thin and broad, like other Java lectures, most of the Java grammar can be explained in a short period of time, and as a result, the preparation time and lecture time are reduced, so the lecture fee is low. However, I think it is difficult to properly learn the Java basics necessary for actual practical work. On the other hand, if you prepare an in-depth Java lecture so that you can properly understand the principles including the content necessary for practical work, the lecture volume increases significantly and it also takes a lot of time to prepare the lecture. The Practical Java Roadmap focuses on depth so that you can properly understand the principles necessary for practical work. So I hope you understand that it has a different direction from other Java lectures. And since I have put a lot of time into preparing it, you will be able to learn more. Thank you.