How to be proficient in java

People often search on the Internet to know how much Java is considered proficient. Today, I will answer this question for you. After you master the following content, you can boast about it. Proficient in Java backend.

1. Computer Basics

This part is a course for computer-related majors, but those who are not majoring in majors will need to spend time to make up for it.

Especially the three courses of computer network, operating system, and data structure. As for the principles of compilation, I just need to know a little bit about it. I have only seen simple concepts and state machine-related content, which is not particularly important.

2.Java Programming

The Java programming part here contains a lot of content. We can look at them separately and roughly summarize them into these parts.

Java Basics The Java basics here include basic syntax, collection class framework, and some advanced features, such as reflection, annotations, etc.

There are a lot of basic Java knowledge points, so it is not that simple to really understand it. In addition, as time goes by, some new features also need our attention, such as the popular JDK8.

Design Pattern

I have always felt that design patterns can be learned together with Java basics, so I also put it here. Of course, some places where design patterns are actually used, such as JDK collection classes, IO streams, etc., also require your attention.

java web technology

Java Web technology includes J2EE, as well as web frameworks, and even a series of commonly used components

1 J2EE mainly includes The most popular ones are servlets and jsp, which are relatively retro web development components. Although there are fewer cases of using them directly now, we still need to spend some time to master them.

2 The commonly used web framework is Spring. Correspondingly, hibernate and mybatis also need to be understood.

3 At the same time, commonly used class libraries in JavaWeb development, such as jnuit unit testing, log4j logging tool, and build tool maven, are all areas we need to master.

4 Finally, it should be noted that some basic knowledge related to the Web, such as HTTP protocol and network security basics, are also things we need to consider.

Java Concurrency Technology

Java’s concurrency technology generally refers to Java’s multi-threading technology, as well as the concurrency classes in the JUC package, such as thread pools and concurrency tools Classes, blocking queues, etc. Java concurrency technology can be learned independently and is a major focus of advanced Java knowledge.

Java Network Programming and Server

This piece of content is a relatively complex but also very important piece of content in Java. For example, some uses and principles of BIO, NIO, and AIO, as well as web servers such as tomcat, and even network programming frameworks such as netty, are all things that can be understood and learned.

Java Basics and Tuning

JVM is a process that provides Java programs to run. Learning JVM knowledge is also a must for us. Through the road. In addition to understanding "In-depth Understanding of JVM Virtual Machines", what we also need to learn is JVM tuning, using appropriate tools to diagnose problems, and finally solve the problems. This part of the interview presents not only GC, memory partitions, and class loaders, but also what I call JVM tuning issues.

3.Linux

As a background classmate, I am often asked Linux-related questions by interviewers, so I think it is quite important to learn Linux well. In addition to basic commands, the most Fortunately, I can also understand some shell scripts and even kernel-related knowledge. This is one of my weaknesses. There is also related knowledge such as databases.

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