Is java useful?

java is useful. JAVA is a very popular language. In today's fast-developing world of information, Java technology is everywhere, including mobile software, mobile Java games, computer software, big data, etc.

What can java do?

1. Big data technology

Hadoop and other big data processing technologies all use Java or others, such as Apache's Java-based HBase and Accumulo and ElasticSearchas.

But Java does not occupy much space in this field, but as long as Hadoop and ElasticSearchas can grow and develop, Java still has the potential to occupy a part of this market.

2. Android application

If you are still looking for where to use Java, you don’t have to search here and there, it is right next to you.

If you open an App on an Android phone, they will use Java language. Search Android API documentation on Google, and you will find that it is surprisingly similar to Java's JDK documentation.

Since Android just started, many Android applications today are developed by Java programmers and developers. Although Android uses different JVMs and different packaging methods, the code is still written in Java language. [Recommended learning: java course]

3. Server program

Java is widely used in the financial services industry. Many banks use Java to write front-end and back-end software. Electronic trading systems, data processing projects and other projects.

In most cases, Java is used for server-side development, but most of them do not have any front-end. They usually receive data from a server (upper level), process it and send it to another processing system (next level). level processing).

4. Website field

Similarly, Java occupies most of the seats in the field of e-commerce and website development. You can use many different frameworks to create web projects, SpringMVC, Struts2.0 and frameworks.

Even simple servlets, jsp and struts-based websites are very popular in government projects. For example, websites for medical aid, insurance, education, defense and other different departments are developed based on Java.

5. Software tools

Many commonly used software and development tools are written and developed using Java.

Such as Eclipse, IneteliJIdea and Netbans IDE. Trading systems

Third-party trading systems are now a large part of the financial services industry, and they are also written in Java. For example, the popular trading platform Murex is also written in Java and is connected to many bank front desks to provide services.

6. J2ME system

With the emergence of IOS and Android in recent years, they have almost occupied the J2ME market, but there are still low-end Nokia and Samsung mobile phones using J2ME.

Most mobile games and mobile applications in this era are written using MIDP and CLDC, which are part of J2ME, to adapt to the Android system. But J2ME is still popular in products such as Blu-ray, magnetic cards, and set-top boxes.

The reason why communication applications are so popular is that Nokia mobile phones still support J2ME.

7. Embedded field

Java has great room for development in the embedded field. On this platform, you only need 130KB to use Java technology (on a smart card or sensor).

Originally, Java was designed to work on embedded book devices. In fact, this is just one area. This was just a "write once, play anywhere" project, and now it looks like this.

8. High-frequency trading

The Java platform has greatly improved the features and real-time compilation of this platform. It can also transfer data like C. It is for this reason that Java became the language for programmers to write trading platforms, because although the performance is not as good as the native language, you can get around its security, portability and maintainability to run faster.

9. Scientific applications

Java is still the best choice for scientific applications, including natural language processing. The main reason is that Java has better security, portability, maintainability, and concurrency than other high-level languages ​​than C or other languages.

It can be said that Java, as the default development language in the software industry, is widely used in various fields, and relevant practitioners also believe that Java has a bright future.

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