Check out the 3 java in the link below and write an article, the purpose of this article is to point out what difficulties you have encountered when programming these 3 code segments, which codes or which code segments are difficult for you (put Copy the most difficult piece of code you encountered into the article, and then slowly explain how you solved it), what did you learn in programming, you wrote code in the process of programming, Highlight your learning experiences and lessons learned o What did you do in the process of programming, how did you write this code, etc. Discuss any additional improvements o What did you do? Assumptions you made for this project Any other content you want to share