After listening to the Java TPC lecture, it was so fun that I even got to see API utilization that I hadn't even thought about. Unlike the previous memory drawing, it was a little boring at first because it explained API utilization methods, implemented code, ran it, and moved on.. But I thought implementing something was more important, and I watched it until the end. The more I watched, the better the organization was. What was good was that it was just different from what I expected, but I still felt that the code implementation after the explanation was good. At first, I thought, let's see how to use 6 APIs, but as I kept following along, eventually, I thought, "Oh, I'm receiving it as a string, parsing it, or receiving it as a byte, loading it into memory in the desired format, and using it." So, my thoughts gradually became abstract?? If you actually implement it, it will be difficult, but no matter what, First, after receiving a text or stream, I thought I could manipulate it as I wanted with Java code, So I thought I wouldn't be scared of any API, not just 6 APIs. As I kept following along, I didn't have any concept of IO, but I think I got a feel for it a little bit this time, And when implementing chat, it was good to write about threads properly for the first time. I've never thought about IOT.. I also wanted to make something that lights up the text as I type for Christmas.. (I want to do it with Java, but I wish someone would give me a custom device ㅠ) And what I felt after watching only 2 lectures is that you teach really well. Just because you're good at it, doesn't mean you're good at preparing materials and explaining them in an easy-to-see way, but I was impressed by both. I'm grateful that you were able to solidify the basics in a short period of time. I'll take another class if there's a DB or Java-related class~