Happy Java

I took this course to remind myself of Java basics. Personally, 1. static and memory 2. abstract class concept with template method pattern 3. factory method pattern and reflection, and lambda concept leading to anonymous class 4. decoration pattern explanation connected to main character, decoration, and IO stream classes These parts were really good. I appreciate that you included the process of solving problems while debugging when making the last chat program in the lecture. It was very helpful.

It was really good that you explained Java grammar (ex. collections, constructors, etc.) frequently used in Spring. It was really good that someone who is in the field explained it. And the best part was that it was free, so I could listen without any burden. Personally, I think I would listen without any regrets even if it was 50,000 won. Since I lack basic knowledge, I wrote down the class content in Notion and studied, and I plan to watch it several times. I came across this lecture because I lack basic knowledge of Java, but if you find this lecture difficult, it would be good to buy Everybody's Java from a bookstore and listen to it. I listened to it while watching it, and it seems good because it covers even the very basic parts. I'm looking forward to the next lecture~ The last network programming and chat program creation are more fun than I thought.

It's a quality lecture that's hard to believe is free. In my personal opinion, there may be moments when a complete beginner takes the lecture. (Design patterns, JVM, using telnet naturally as a terminal, etc.) However, since he explains it in such detail and says that you don't need to know the deep parts of JVM right away, I think even a complete beginner can follow along if they put in the effort. I think it would be great for those who are trying to review in an ambiguous state like me. However, since the basic lecture nature does not explain the details of Generics' wildcards, streams, and threads, it would be good to look up these parts separately in a basic book or on the Internet. After completing the lecture, the following three things still linger in my head and come to mind immediately. 1. Refer to the child type as the parent type! When overriding a method, always use the child type! 2. Easy to replace when using a collection! For example, refer to the ArrayList type as the List type 3. The main character while explaining the IO and decorator patterns! It is impressive that it shows decoration! as an Oracle document I hesitated and hesitated to write the content, but the conclusion is that I am leaving this review because I am grateful for the free and great lecture. I hope many people will be helped by this lecture.

I am using Java, but I lack Java concepts, so I started studying from the beginning again. While looking for several Java lectures, this lecture seems to be the best for me! It is very easy to understand because it explains with examples! I am still listening, but this lecture is already very helpful to me!!

Thank you for explaining the beginner's usage of the project and how it is used in the company.

I studied Java from a book and took this course to review. The course explains the parts of Java that I lacked through various example codes. In particular, it was good that I was able to study the parts that I lacked in the book more deeply by explaining the IO and Thread parts in detail. If you are studying Java for the first time or reviewing it, I recommend this course.

There are many other free lectures, but I really like the fact that Fun Java firmly grasps the concept of oop. I think of it as a lecture fee and leave 5 stars. I think of it as a required course and will continue to watch it. I look forward to the next curriculum.

You explained Java concepts so easily and it really helped me a lot.