This lecture was much more informative than I thought. Even theoretical elements that are easy to overlook are explained in detail, so even when I already know the content, I end up listening to it all without skipping. Things like classes and interfaces were really hard for me when I first encountered them in Python or C (similar concepts, if not the same), but it was easy to understand because they gave appropriate and simple examples. I recommend this to people who are new to programming. However... as many others have said, the sound is so so so so small ㅠㅠ (I have to close everything, including KakaoTalk on my PC, because I'm afraid my ears will tear if I listen with the volume turned up to the max and other program sound effects start playing. ㅜ) The text is also a bit small, so I can't see it well unless I use full screen, and there are a lot of broken texts (It's okay because they provide lecture notes, so I can look at them). Also, there's too much noise from the middle. It's not just a light humming noise, it's like scratching a blackboard... ㄷ ㄷ ㄷ And there are a lot of spelling errors in the lecture that are not only annoying to look at, but can cause people to misunderstand what they mean... I hope that won't be the case in the future lol. Despite these problems, I think the lecture itself is very good for beginners to learn Java.