My cousin is a Java developer in a certain project team of Ali. This year, I came back from the holiday half a month early for the Chinese New Year. As soon as we met, I got an iPhone13pm for each of our brothers and sisters. This move is really generous. Thinking about his work unit, maybe 30,000 to 40,000 yuan is only half a month's salary for him. Think about my small company, which is also doing Java development, why the gap is so big.
I talked to him quite a lot in the past two days. He said that although he is busy at work now, he basically directs the people below to do things. At this level, he also needs to start realizing his self-worth, so he is on many platforms online. I opened an account to answer questions from netizens about the Java field. I also took advantage of the opportunity to ask him a few problems that I encountered in my usual work. After chatting with him, I suddenly realized that I am indeed an experienced old developer.
Later, he turned on the computer and sent me a copy of "In-depth Analysis of Advanced Core Knowledge of JAVA" to me. He said it was an internal training material. Some of my own experiences and thoughts!, this notebook has the following 17 sections.
If you want to learn, you can follow me, send a private message to 666, and you can get it for free.
Java foundation, Java collection, exception & reflection, IO & NIO, multithreading, JVM, Linux, MySql, Spring, Spring Cloud, Mybatis, Nginx, Redis, Dubbo, Kafka,, SpringBoot, resume.
Introduction
1. Java knowledge part
1.JVM：
JVM is the only way for junior Java programmers to grow up. Before learning JVM, you only need to know that the code is compiled into Class, and the virtual machine loads Class to run. After learning JVM, you can deeply understand the process of code from compilation to loading , the creation and garbage collection of objects in memory, and the quick positioning of performance problems in daily development, etc., are of course indispensable bonus points for interviews.
2. Java Collections:
3. Multi-threaded concurrency:
4. Java basics
5. The principle of spring
Second, the database part
3. Distributed high concurrency architecture part
This part is about the knowledge of distributed architecture, including Redis, Zookeeper, database performance optimization, load balancing, etc.!
5. Microservice knowledge
There are a lot of interviewees recently, and I hope to help more people pass the interview in Dachang smoothly. If you want to learn, you can follow me, send 666 by private message, and you can get it for free . If you find it useful, please give me a comment, like and forward three times~~