Preface
As a technical person, we must not only continue to learn to improve ourselves from being eliminated, but also continue to summarize our own experience and lessons. We must be good at thinking about how to avoid stepping on the pit next time. We shouldn’t be confined to our own technological world and just type code and ignore things outside the window. This is a bit too restrictive and not conducive to our own development.
We are experiencing the era of rapid development of the Internet, from the initial PC era, to the mobile Internet, and then to the big data, artificial intelligence, blockchain and other technologies in recent years. The speed of technological iteration is faster than before. This also means New technologies will gradually replace some of the old technologies, so you have to follow the changes of the times, constantly update your technology stack, adapt to the new technology environment, and enhance your core competitiveness!
The prosperity of some emerging technology industries will inevitably lead to the decline of other technologies. The term decline is not used too appropriately. For example, mobile development, which was very popular in 12 and 13 years, has gradually become less popular in recent years. In fact, after several years of development, the threshold for development has become lower and lower, and the demand for technical talents has gradually become saturated. However, junior engineers still account for a large part, and senior engineers are still relatively small, so there is a fault in the middle. , If you are a beginner, how to improve yourself more quickly and achieve a leap to advanced? This should be a question you need to think about. If you are a middle-to-senior developer, you should also have some sense of crisis, so that you can always remind yourself to keep learning, to constantly change and adapt to the development of technology, and to keep advancing with the trend of technology, so that you will not be eliminated! In addition, don’t keep guarding your own one-acre three-quarters of land. You should learn more about other techniques and cultivate your second technical ability. The premise is that you must first do your own job well and use your spare time to go. Learning some other technologies, the technologies are also interlinked. If you have a thorough research on a certain aspect, it is easy to learn other technologies.
Therefore, only by following the industry leader can the Internet industry try not to become the guy behind the crane;
Recently, after a friend revealed, Alibaba released a limited " Java Upgrade Notes " for the first time. The knowledge points recorded in it are very complete. After reading it, I realized that the gap is really more than a little bit!
The Java upgrade notes mainly hierarchical Java programmers according to their age, clearly marking what route Java programmers should follow to improve themselves, and what technical points need to be learned.
The following will introduce the knowledge points covered in the main content of this Java upgrade note. Due to the length of the article, only the screenshot content is shown. If you need the full pdf version, you can see the end of the article for free.
The general contents of the Java upgrade notes are as follows:
Getting started (0-2 years):
- Interview guide (how to write a resume + how to prepare for an interview + my learning method)
- A solid Java foundation (object-oriented + Java super class + Java reflection mechanism + exception handling + collections + generics + basic IO operations + multithreading + JDK new features)
- Network knowledge (computer network technology + TLS in HTTPS)
- Data Structures and Algorithms
- Will Tool (Git+Docker)
Beginner (2-4 years):
- Concurrent programming (concurrent tool combat + CAS + display lock analysis + thread pool internal mechanism + performance optimization)
- JVM in-depth analysis (understanding the runtime data area + interpretation of off-heap memory + JDK + memory leak troubleshooting + Arthas + GC algorithm and garbage collector + class loading mechanism, etc.)
- Database (MySQL+Redis)
- Middleware & Distributed (dubbo+MQ/kafka, ElasticSearch, SpringCloud and other components)
- Deep into the bottom of Tomcat
- Contact with the actual combat of Internet projects (RestFul API + common framework + authentication and authorization + distributed + large-scale website architecture + microservices)
Advanced (4-7 years):
- Open source framework (Spring5 source code + SpringMVC source code + Mybatis source code)
- Distributed architecture (Zk actual combat+RabbitMQ+RocketMQ+Kafka)
- Efficient storage (Redis+mongoDB+MySQL high availability+Mycat+Sharing-Sphere)
- Microservice architecture (RPC+SpringBoot+SpringCloud Netflix+SpringCloud Alibaba+docker+k8s)
Delivering food for more than 10 years: just a joke
Getting started (0-2 years):
1. Interview guide
2. A solid Java foundation
3. Network knowledge
4. Data structure and algorithm
This is a notebook dedicated to learning algorithms: I found an algorithm notebook of Ali Great God when I checked Github! Biaoxing 70.5K
6. Must know tools
Beginner (2-4 years):
1. Concurrent programming
2. In- depth analysis of JVM
3. Database
4. Middleware & distributed
5. Deep into the bottom of Tomcat
6. Contact with Internet projects
Advanced (4-7 years) architecture:
1. Open source framework
2. Distributed architecture
3. Efficient storage
4. Microservice architecture
to sum up
If you think of programmers as the best profession in the world, I don't think it is necessary. In fact, too many professions are better than programmers, but programmers are suitable for ordinary people, poor people, and "low threshold"; most programmers are poor people for money, and rich people generally go to finance;
Because most programmers are people whose background is not very good, the topic of mid-life crisis will be infinitely expanded (without background support). How can you keep up with the generations of others after ten years of hard work? Hard work?
Regarding the midlife crisis: Life is inherently difficult. People without far-sightedness must have immediate worries, and the midlife crisis is just the result of your own planting. Secondly, when programmers are young, they accumulate a little more money than other brick-moving professions, buy more houses for rent, save more money, diversify investment, and their anti-risk ability is slightly better than other industries;
Although I personally often laugh at myself, I will become a food delivery specialist in ten years, but in fact, relying on my own efforts can reduce the anxiety after 35 years old. After all, there are not many good architects.
If you don't really want to boil frogs in warm water, then maybe you need to read the above Java upgrade notes, hoping to help your career development.
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