Joseph's honest review, Happy Java course

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.

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