I am currently a student working as a web developer. I always learn a lot from Younghan's lectures, and through this Java introductory lecture, I think I have properly reviewed the basics of Java for the first time in a long time. As expected, the lecture quality is really... Needless to say, it was really good!!! This lecture included practice problems, which was different from the previous ones, and I think this part was really good. I was able to organize the concepts again by listening to the lectures for each part and solving the practice problems. It must have been really hard to create the problems, but if you are greedy, I would be very grateful if you could include problems like this in the future. Then, I will go listen to the basics. Thank you for always creating good lectures.