[Positive aspects of this course] This course served as a good indicator for self-diagnosing where my Java grammar is lacking before moving on to Spring or other Java-based technology stacks. As someone who is terrible at this, I plan to polish my Java fundamentals again and then retake this course from the beginning. [Course level] Including myself, if you lack overall Java fundamentals like Java 8, anonymous classes, interfaces, polymorphism, etc., this doesn't seem like an easy course. When I looked at the curriculum with the title "Java Introduction," I saw object-oriented programming and Java 8 at the very top and thought, "Huh? It'll take me several more years to get through the introduction??.." which made me consider the purchase. [Personal wish] As a personal wish, although it's already excellent, I think it would be great to have more diverse courses by level. After completing backend web development government-funded courses or bootcamps, people can create web pages with Spring, but I think many are weak on Java fundamentals like what the heap area is, what the method area is, how creating an instance returns a reference value to the heap area, etc. For a truly genuine Java introduction course, this course is sufficient for code-shortening techniques like Java 8, inner classes, anonymous classes, and Java 8. I think if a course is launched with many problems that help understand polymorphism and interfaces - the flower of object-oriented programming - through interface classes, implementation classes, main functions, etc. (even if the code is lengthy), many Java beginners would purchase it. I'm still reviewing stream API now, but I'm still very confused and can't adapt to putting interfaces and implementations in one class 😭😭 Next year, when I have a bit more fundamentals, I'll be able to adapt to even this, right? 😭