java experience

  I have been working for more than 4 years, and I thought about giving up or changing careers. When I first came out, I was engaged in java web development. I learned Android by myself because of the pursuit of high salary. I continued to choose my java. When I used java during my work, I never thought about why some things should be like this. Someone will build the framework for you, someone will help you manage the project, and someone will help you test the code you write. Machine gang work.
  After I worked for 2 years, a new technology came to the fore. The attack of big data made many java people pursue blindly. I was no exception and started to collect relevant information. The simple operation of linux is the foundation. This is a novice for people who have never used linux at all. Then I learn linux by myself. Because of work, I can only learn by myself at night or on weekends, but I have never considered a serious one. The question, why do you want to learn big data by yourself? I believe that many people have the same idea as me about "high salary", but I have been self-taught for half a year, and I feel very boring. I had a heart of neglect, and this technology was put aside for me. .
   After I was fortunate enough to join a company, I focused on the back-end and needed to be exposed to the server-related deployment. I quickly reviewed the linux I learned before, and then learned the construction of nginx, tomcat, and redis. I just thought about how to build and run the server. , but never thought about the optimization of nginx tomcat, why should it be combined in this way.
    After working for so long, I believe many people, like me, have little understanding of the underlying knowledge, such as: the implementation principle of the collection framework, just like when I go to fetch water, why should I choose buckets instead of floating, when you go to give flowers Watering, why choose to float instead of buckets, the same is true for frames. . It’s just that we’ve seen a lot of other people use it this way, and we’ve used it this way ourselves. Without our own thoughts at all, it is difficult for us to go on this road, and we feel very confused, and even wonder if we are suitable for this industry.
   This is the first time I write a blog, and I hope you can give me more advice. Interested friends can join this group 183153579