Shulou(Shulou.com)06/01 Report--

This article mainly introduces "why Java is so popular". In daily operation, I believe many people have doubts about why Java is so popular. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful for you to answer the doubts about why Java is so popular. Next, please follow the editor to study!

1) simplicity

Java provides developers with an easy-to-use user experience. Compared with other object-oriented programming languages, the design and ecological library of Java have great advantages. Java removes the rarely used, difficult to understand and confusing features of C++, such as pointer operations, operator overloading, memory management, etc.

Java can do stack allocation, garbage collection and automatic memory management, which makes it easier for developers to get started to some extent.

2) portability

If Java is directly compiled into binary code recognized by the operating system, a logo may be 1100 under the Windows operating system and 1001 under the Linux operating system, so that the programs that can be run under the Windows operating system cannot be run in the Linux environment.

In order to solve this problem, Java first compiles and generates bytecode, and then it is interpreted and executed by JVM (Java Virtual Machine). The purpose is to convert the unified bytecode into binary code that can be recognized by the operating system, and then execute it. For different operating systems, there are corresponding versions of JVM, so Java achieves portability.

3) Security

Java is suitable for network / distributed environments. In order to achieve this goal, a great deal of effort has been invested in security. Using Java, you can build anti-virus and tamper-proof programs.

From the beginning, Java has designed a number of mechanisms to prevent attacks, such as:

Run-time stack overflow, which is a common attack by worms.

Bytecode verification ensures that the code conforms to the JVM specification and prevents malicious code from destroying the runtime environment.

Secure class loading prevents untrusted code from interfering with the operation of Java programs.

Comprehensive API supports a wide range of encryption services, including digital signatures, message digests, (symmetric, asymmetric) passwords, and key generators.

Secure communication, support HTTPS, SSL, protect the data integrity and privacy of transmission.

4) concurrency

Java is very good at multithreading, and threads in Java can take advantage of multiple processors as long as the operating system supports it, resulting in better interactive response and real-time behavior.

"second Brother, will Java continue to be popular?" The third sister blinked her long eyelashes and said to me.

"of course." I answered categorically.

Big data's field:

Like Python, Java occupies a dominant position in the field of big data, and many frameworks for dealing with large-scale data are based on Java.

Apache Hadoop for processing large datasets in a distributed environment. Hadoop adopts the primary and secondary architecture mode, in which the master node is responsible for controlling the whole distributed computing stack. Hadoop is popular among companies that need to process and analyze large-scale data.

Apache Spark, Spark is often used by large ETL (data Warehouse Technology), predictive analysis and reporting programs.

Apache Mahout for machine learning, such as classification, clustering and recommendation.

JFreechart, used to visualize data, can be used to make a variety of charts, such as pie chart, bar chart, line chart, scatter chart, box chart, histogram, and so on.

Deeplearning4j, used to build various types of neural networks, can be integrated with Spark and run on GPU (graphics processing unit).

Apache Storm, used to process real-time data streams, a Storm node can process millions of jobs in seconds.

Internet of things (IoT) area:

Oracle says flexibility and popularity are the main reasons why IoT programmers choose Java. Java provides a large number of API libraries, which can be easily applied to embedded applications. Compared with other programming languages, such as C, Java is smoother in switching platforms and is less error-prone.

Financial services:

Chat robot, due to portability, maintainability, visualization and many other factors, Java has become the best tool to develop chat robot.

Fraud detection and management, banks and financial companies use AI (artificial intelligence) tools for financial fraud and credit card fraud detection, and Java is often used to develop these AI tools.

Trading system, the dynamic runtime compilation optimization provided by the Java virtual machine has better performance in many cases than compiled languages such as C++, making the trading system run more smoothly.

Mobile wallet, a mobile wallet based on AI and Java algorithms, can help users make smarter decisions when spending money.

Web domain:

Java technology has given a strong impetus to the development of the Web field, and there are many mainstream Java Web development frameworks:

Spring framework, a lightweight inversion of control (IoC) and aspect-oriented container framework (AOP), permeates all aspects of Java EE technology, and most Java applications can benefit from Spring framework.

Spring MVC framework is a lightweight Web framework based on the request-driven type of MVC (Model-View-Controller) design pattern implemented by Java.

MyBatis framework, an excellent data persistence layer framework, can establish a mapping relationship between entity classes and SQL statements. It is a semi-automatic ORM (Object Relational Mapping, object relational mapping) implementation.

The JavaServer Faces framework, developed by Oracle, which can easily connect the presentation layer to application code, provides a set of API for representing and managing UI components.

At this point, the study on why Java is so popular is over. I hope to be able to solve your 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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