How to learn java language?

For those who like programming, Java is a language worth learning. So how should you learn Java language?

If we want to learn Java, we must first understand the meaning of each version of Java:

JavaSE (Java Standard Edition): Standard Edition, positioned for individuals Computer applications. This version is the core of the Java platform. It provides a very rich API to develop applications on general personal computers, including user interface interfaces AWT and Swing, network functions and internationalization, image processing capabilities, input and output support, etc. The Applet that was so popular on the Internet in the late 1990s also belongs to this version;

JavaEE (Java Enterprise Edition): Enterprise Edition, positioned as a server-side application. JavaEE is an extension of JavaSE that adds class libraries for server development. For example: JDBC allows programmers to use SQL syntax directly in Java to access data in the database; Servlet can extend the functions of the server and handle client requests through the request-response model; JSP is a method that can use Java to Technology for embedding program code in web pages;

JavaME (Java Micro E#dition): Micro version, positioned in the application of consumer electronic products, JavaME is An extension of JavaSE, it includes some core classes of J2SE and also has its own extension classes. This version streamlines the core class library to meet the needs of electronic consumer products with limited resources, and provides a modular architecture so that different types of products can add support at any time. ability.

Below I will introduce to you how to learn:

JavaSE part:

When novices first learn, they must start with JavaSE. The content included is mainly divided into: understanding of object-oriented concepts, learning basic Java syntax, development of Java desktop graphical interface applications, mastering commonly used Java APIs, etc. (the key is to learn how to look up).

Focus: Java basic syntax (loop structure, data type, array, operator, etc.), Swing, awt, event mechanism, file input and output stream processing, etc.;

Difficulty: object-oriented thinking Understanding (interfaces, classes, etc.), threads, socket network programming, etc.

JavaEE part:

After learning JavaSE, you can try to slowly transition to JavaEE. Of course, learning JavaEE also requires the support of many other technologies, such as database technology, web programming technology, etc. JavaEE has three must-learn frameworks. If you say that you have learned JavaEE but do not know these three frameworks, you should not do it. These three frameworks are Struts, Spring and Hibernate, although these three frameworks are widely used. Wide, but it does not mean that these three frameworks represent JavaEE. JavaEE has many other things.

The current popular framework in JavaEE is the SSM framework, which is the three open source frameworks of Spring, SpringMVC, and MyBatis. It is an improvement on the previous SSH framework.

Since the content of JavaEE is too complex, it is recommended that you only learn: JSP, servlet and JavaBean at first. After mastering the basics, you can learn SSH. Then you can go out with a general understanding of other JavaEE technologies. Looking for a job. Of course, in addition to learning Java well, there are also other technologies that must be mastered before finding a job.

The more important content is database technology:

The database is almost an indispensable part of the program, and it plays an important role in the entire software development. . The database plays the role of the foundation in the entire software. If you want to build a house, you must first lay a good foundation. If you want to build software, you must first design a good database. At present, almost all databases are relational databases, represented by: SQL Server/MySQL, etc.

To sum up, learning Java is not difficult, as long as you can insist on hands-on learning, master the basic Java syntax, be able to skillfully apply the framework in actual projects, and be able to add, delete, modify and query the database As development experience increases, technology will continue to improve.

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