After listening to the actual Spring Boot and JPA roadmap and before moving on to the advanced Spring, I was curious about how the Java lectures were conducted, so I took the free Java lecture first, and I think my basics became more solid by covering the basics once more. ㅎㅎ The Java lectures were fun because there were problems in each chapter, but when I looked at the Java lectures that I had paid for, I thought that having these problems continuously would be very helpful! I felt that Younghan's Java lectures were different, and I learned so much fun! After listening to the remaining advanced Spring and Spring Boot core principles first, I thought I should take the paid Java lectures to quickly solidify my Java basics. ㅎㅎ I respect Younghan for giving me this high-quality 12-hour lecture for free! P.S. The keyboard keystroke sound changed. Did you lubricate or change the keyboard to a mechanical keyboard? I can't hear the unique stabilizing sound of the Realforce.. I'm curious and asking..ㅎㅎㅎㅎㅎ