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This article focuses on "what are the skills that Java developers should learn". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn what skills Java developers should learn.

1. Git

Git is one of the essential tools for Java developers and for every JAVA developer. Git is used to manage any project set through a version control system. This is a completely free open source system. It focuses on nonlinear workflow, integrity and speed.

Linus Torvalds created Git in 2005, and you can use the Git project directly because it is a complete version control system. We have listed some features of Git to help you learn more about Git:

Distributed extensions: repositories help Git create copies of development history.

Link method: Git has a toolbox-based design that provides a well-defined model.

Toolbox-based design: toolbox-based design helps to reduce composite parts.

Strong support for non-linear extension: scaling and branching are two basic factors provided by Git. Git provides strong support for nonlinear development.

Managing large projects is organized: locally stored repositories help manage large projects transparently.

Compatibility with existing systems: for any technology, there are various publishing tools, such as FTP and HTTP. Git also supports these publishing tools.

2. Selenium

The Selenium Web driver in Java is one of the technologies that Java developers should know in 2021, and Selenium provides tools to test web applications using a testing framework. Selenium Web Driver provides an open source API. It includes automation features of web applications. The functional features of Selenium are as follows:

IDE (integrated development environment)

Remote control / Selenium1.0

Web controller / Selenium2.0/3.0

Selenium grid

3. Jenkins

Jenkins is a continuous integration tool based on Java, which supports the automation of software development process of various version control tools.

Jenkins has enabled its plug-ins to integrate with code written in another language. Here are three main reasons why you should choose Jenkins: higher software quality, faster development, and automated system management integration.

4. User-friendly Web service

The full name of REST is Representative Translation of State (declarative state transition), which is a must for Java developers. It improves the performance of Web services and defines scalability and performance constraints.

Entertainment API for communication in Web service development. If you know HTML, CSS, etc., then you will know the benefits of RESTful web services. The following are the features of RESTful services:

Client-based: the server-side architecture provides server management, deployment, and hosting functions. It also helps users to use services and resources. It is essentially a shared computing model.

Statelessness is one of the main features of REST services, and the server can understand and provide all the data that makes up the HTTP REST request.

Cacheable architecture is a major constraint for Web API and applications. Caching is the key to improving scalability.

REST API supports multiple servers in a multi-tier system, that is, if one server is busy, you can forward the request to another server. The multi-tier system ensures fast response time for the client.

The unified interface provides a single URI for record storage.

5. Spring security

Its main function is application authentication. The J2EE servlet specification and the EJB specification are two key security features popular among JAVA developers.

Spring Security supports multiple authentication models. It integrates with various technologies, such as HTTP, Kerberos, JOSSO, CAS, LDAP and so on. Spring Security is directly related to Java, so it is strongly recommended that Java developers learn from it.

6. Spring Boot 2.

Spring Boot has released a new version called Spring Boot 2. Spring Framework is responsible for control, and Spring Boot is responsible for generating stand-alone solutions with regular configurations.

It mainly relies on JAVA Baseline, BOM materials and cradle plug-ins. Its automatic configuration provides security and responsiveness. It also provides technical support and improves the developer experience. It is one of the basic tools that Java programmers should know. The main features of Spring Boot:

Undertow, Jetty, or Tomcat can be deployed directly.

To reduce the build configuration, provide dependencies.

Create a standalone application in Spring.

Automatically configure Spring attachments.

Provide complete security and technical support.

There is no need to generate code for the XML configuration.

7. Angular or ReactJS

A specific JavaScript library for UI development is called ReactJS, and Angular is a framework. JAVA developers should be familiar with these two key technologies.

Angular 2 is an open source web application framework. The main features of Angular are instructions, scope, templates, comments, advanced dependency injection, and sub-routers. Develop mobile applications using ReactJS. The main features of ReactJS include free open source communication with the server and so on.

8. Apache Spark and Kafka

Apache Spark and Kafka are two essential technologies for Java developers in 2021. Apache Spark is an open source cluster computing framework.

Spark provides an application program interface for performing basic Istroke O, scheduling, dispatching, and other tasks, as well as the same open source streaming platform. In particular, the Apache Kafka code is written by Java and Scala.

Kafka can use basic API, such as producer API, consumer API, connector API, and stream API.

9. Docker

Docker is a language written in the go language and developed on Linux. It is also a must-have tool for Java developers in 2021, and it provides tools to help with containment. It is also a stable version released at the end of 2018.

10. Unit testing

Unit testing is a basic skill of Java developers, and you should master it. For those who use Java for integration and unit testing, there are several tools and frameworks. For example, the Cucumber and Robot frameworks for automated integration testing. Mockito is also a tool that can help you with unit testing.

11. Java 10, 11 or 12

Java is one of the most widely used languages in the world, and it is a basic skill that Java developers must master. It is defined as REPL (Read Evaluation Print Loop, read-evaluate-output-loop). In Java 9, Java Shell is accurately described. The Java artifacts executed and tested in Java 9 include declarations, objects, interfaces, classes, and so on. You can also choose a higher version, such as Java10, 11 or 12. Java 12 is the latest version of the Java programming world.

12. Spring framework 5.0

Java uses the Spring framework as its application framework. Spring has a web framework called Spring WebFlux. Spring Framework 5 is a specialized framework that provides many useful API variants, in addition to many functional API variants, which are newer versions of Spring MVC.

13. DevOps

DevOps is also one of the basics that Java developers need to learn in 2021. DevOps is an effective method of software development, operation and maintenance, which can shorten the development cycle of the system and provide updates and features for enterprise objects. It establishes a closer relationship between various processes and IT development, resulting in better collaboration and communication.

14. Groovy

Groovy is also one of the important tools that Java developers will learn in 2021. Apache Groovy supports Java syntax. One of the best features of Groovy is that it supports both static and dynamic use. It can be used as a Java platform or as a scripting or programming language. It is affected by Java, Python, Perl and Ruby.

At this point, I believe you have a deeper understanding of "what skills are worth learning by Java developers". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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