What does java mainly do?

"What is Java?" Java is a completely object-oriented programming language introduced by Sun Microsystems in May 1995, which can write cross-platform application software.

It not only absorbs the advantages of C++ language, but also abandons the concepts of multiple inheritance and pointers that are difficult to understand in C++, so Java language has two characteristics: powerful function and simple use.

"How did Java come from?" At the end of the 20th century, a single-chip microcomputer system appeared in the hardware field, which was cheap and immediately attracted the attention of researchers. Because the C++ program is too complex and huge, researchers developed an object-oriented language called Oak. This is the prototype of Java.

From 65438 to 0995, in order to make monotonous static web pages "flexible", the industry urgently needs to develop a program. At this time, Sun remembered the oak tree that had been put on hold for a long time and renamed it Java. Its language is concise, the program is small, and it is suitable for transmission on the network.

1995 In May, Sun Company officially released Java. Since then, Java has gone through all kinds of difficulties, and after more than 20 years of development, IT still thrives, ranking first in the list of major programming languages all the year round, which also highlights its absolute dominance in the field of IT technology.

"What can I do after learning Java?" ● Programmers, shuttling between various software development;

● Architects, participating in the realization of large-scale projects;

● Website development, consisting of several pages;

● Game development. In the past, when Nokia was still very popular, more than 90% of mobile games were developed by Java.

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In addition, we can also do embedded devices, consumer electronics product development, desktop programs and so on.

As the mainstay of the Internet, Java technology ranks first in its application scope and employment number.

"Is the employment prospect of Java saturated?" Java technology is almost everywhere. As long as electronic products are used, they will be linked to Java.

In recent years, the Internet in China has developed rapidly, and various products such as take-away, e-commerce and short videos have emerged one after another. Among them, the rapid development of the Internet in China and the continuous growth of the number of netizens are inseparable from the hard work of a group of China programmers.

Recruitment 1. Java is in China;

Take a recruitment website as an example:

2.Java programmer salary range distribution map:

As can be seen from the above figure, more than half of senior programmers earn more than 200,000 yuan a year, and nearly 40% of senior programmers earn between 250,000 yuan and 500,000 yuan a year.

Programmers are also an "iron rice bowl"

Since the second half of 20 18, many internet companies have laid off employees on a large scale. Everyone says that "capital winter" is coming, but from the survey results, 90.9% of programmers are "not afraid at all"!

"How wide is the application scope of Java?" Java can do many things, involving all aspects of programming, from e-commerce websites to Android applications, from scientific applications to financial applications, from games to desktop applications and so on.

● Android application

Open your Android phone and any App, which are all developed in Java language.

Mobile phone systems seen in the market, such as MIUI, Alibaba Cloud, Le Frog, etc. , are redistributed by modifying the source code.

● Server programs applied in the financial industry

Because of its high security, Java is widely used in the field of financial services.

Banks and third-party trading systems mostly use Java to develop foreground and background electronic trading systems, data processing projects and so on.

● Network application

Java language occupies a certain position in the field of e-commerce and website development. Developers can use different frameworks to create web projects.

It is often used by many government departments such as the Ministry of Science and Technology, the Ministry of National Security and the Ministry of Culture.

● J2ME applications

At one time, almost all the games and software on Android were MIDP and CLDC, which were part of J2ME platform.

● Big data technology

Many big data processing technologies, such as Hadoop, are Java-based, such as Apache's Java-based HBase and Accumulo, and ElasticSearchas.

● Embedded field

Java has a broad development space in the embedded field. On such a platform, you only need 130KB to use Java technology well.

"What kind of people are suitable for learning Java?" ● Strong logical thinking ability.

For Java, all functions are realized by writing code, which requires developers to have strong logic and operability.

● Correct mentality, practical patience.

In the usual work, a large part of time will be spent solving bugs and checking the code repeatedly after encountering problems, so having a good attitude is also an indispensable advantage.

● Ability to keep learning.

With the development of science and technology, various new technologies will appear constantly, and developers need to pay attention to these new technologies in time and turn them into their own skills.