Leaving a course review after a long time~! The most impressive section was 14 (Thread Pools and Executor Framework)... The problems and situations that occurred early on when I first joined my current company almost exactly matched the content explained in Section 14, which brought back memories of that time. (+ Back then, I just roughly solved it myself and moved on, but it was good that the lecture explained it in detail.) Thank you for creating so many good lectures, and please continue to create many good lectures in the future!!