I was developing with Nest.js, but I had a project with Spring, so I decided to start with the basics. Since programming languages are something that you learn quickly when you study one language in depth, you can learn other languages quickly. Actually, I was going to watch it lightly with the thought of 'let's see how Java came to be', but I think it has the power to strangely focus the students. In particular, I really liked the part where it didn't just give boring Java grammar lectures, but also touched on points that students might be curious about in between, and briefly explained how to write good code. I will trust the Spring roadmap and listen to it!!! Thank you so much for providing these lectures for free.