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This article mainly introduces "what is the function of Java programming language". In daily operation, I believe that many people have doubts about the function of Java programming language. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts about "what function does Java programming language have?" Next, please follow the editor to study!

Java programming language interpretation

Do you remember the Basic language? When we use the basic language for programming, we have to first enter the Basic language environment, and then input the source program, and then run it. The Basic language environment explains and runs sentence by sentence, and directly obtains the result. This language is an interpretive language.

However, this is not the case with languages such as CumberCraft +. We first use editing software or integrated development environment (IDE) to write source programs, and then compile them to generate executable files. Then we get the result by executing the executable file through the operating system. This language is a compiled language.

Interpretive language is inefficient and slow, while compiled language is efficient and fast.

Java is an interpretive language. Yes, I read it correctly, it is an interpretive language, that is to say, the program written by Java language is inefficient and slow to execute compared to the Cpicket + language. But it achieves the grand goal of "write once, run everywhere" by running Java interpreters on different platforms to interpret Java code. In order to achieve the goal, it is worth sacrificing efficiency. Besides, today's computer technology is changing with each passing day, and the computing speed is getting faster and faster, so users will not feel too slow.

Java programming language is suitable for distributed computing

Java language has powerful and easy-to-use networking ability, so it is very suitable for developing distributed computing programs. Java applications can access remote objects through URL as if they were local file systems.

Writing a Socket communication program in the Java language is easy to use, easier to use than any other language. And it is also very suitable for the development of common gateway interface (CGI) script development, in addition, you can also use Java applets (Applet), Java server pages (Java Server Page, referred to as JSP), Servlet and other means to build richer web pages.

Java programming language has good performance.

As mentioned earlier, because Java is an interpreted language, its execution efficiency is relatively slow, but because the Java language uses two means, its performance is still good.

1) after the Java language source program is written, it is pseudo-compiled using the Java pseudo-compiler to convert it into intermediate code (also known as bytecode), and then interpreted

2) A "quasi-real-time" (Just-in-Time,JIT) compiler is provided, which can be used to convert bytecode into machine code and then buffer it when a faster speed is needed, which makes it faster.

Some tips:

This JIT compiler, as its name implies, Just-In-Time, is done only at run time, compiling it into platform-related machine code (since it is now running, there is no need to think about portability). After this treatment, the speed can be increased by 10 times or even 20 times. And this technology is constantly being corrected, and in the future, the JIT compiler will be smarter and can monitor which code is often executed, so as to optimize it appropriately and further speed up the execution speed.

Be robust and take precautions against trouble

The Java language does a lot of checks for early potential problems during pseudo-compilation, and does a lot of corresponding checks at run time, which can be said to be the strictest kind of "compiler".

Its "precaution" means to stifle many program errors in the blue. There are often many errors that must be run in other languages to be exposed, which are discovered during the compilation phase.

In addition, many features that ensure the stability and robustness of the program are provided in the Java language, which effectively reduces errors, which makes Java applications more robust.

Java programming language has the ability of multithreading.

Thread, a lightweight process, is an indispensable feature in modern programming. The ability of multithreading makes the program more interactive and real-time.

Java has excellent performance in multithreading, has a powerful ability to surprise you, and multithreading in the Java language is easy.

Note:

It should be noted that the implementation of threads varies widely among the mainstream platforms, so the Java language is not available for the time being.

This aspect is "platform-independent", so Java implements a set of multithreading mechanisms for different operating systems.

And for programmers, the code that invokes multithreading is the same on different machines.

Java programming language has high security.

Because of the careful consideration of security and a lot of research in the design of Java language, Java language has become the most secure programming language at present.

Although Sun has promised that "anti-virus and anti-hacker systems can be easily built through Java", the truth that "there is no absolute security in the world" will not fail because of someone's promise.

Shortly after the release of JDK (Java Development Kit) 1. 0, a team of security experts at Princeton University in the United States discovered an error in the security features of Java 1. 0. From then on, the security of Java began to be concerned. However, the security risks discovered so far are negligible, and the Java development team claims that they attach great importance to the Bugs of system security and will fix them immediately.

And because Sun has opened the details of the Java interpreter, it is helpful to find, prevent and stop these security risks through the efforts of all walks of life.

At this point, the study of "what is the function of the Java programming language" is over. I hope to be able to solve everyone's doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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