Analysis of ten basic features of Java language

The authors of Java have produced a wide-ranging Java white paper detailing their design goals and achievements, as well as a brief introduction to the features of Java. These features are described below.

1. Simple

Java's syntax is straightforward, easy to grasp, and it is purely object-oriented. The simplicity of Java language is mainly reflected in the following aspects:

The grammar rules are similar to C++. In a sense, Java is a transfer from C and C++ languages, so C programmers can easily master the syntax of Java. The Java language simplifies and improves C++. For example, Java USES interfaces instead of multiple inheritance and eliminates Pointers, because Pointers and multiple inheritance often complicate programs. The Java language also greatly simplifies resource release management for programmers by enabling automatic garbage collection. Java provides a rich class library, API documentation and a third developer package, as well as a large number of open source projects based on Java. JDK (Java Developer Toolkit) is already open source, allowing readers to improve their programming skills by analyzing the source code of the project.

2. Object orientation

Object orientation is the basis of THE Java language and an important feature of the Java language, which is itself a pure object oriented programming language. Java advocates that everything is an object, and the syntax cannot define separate data and functions outside the class. That is to say, the outermost data type of Java language is an object, and all elements should be accessed through classes and objects.

3. Distribution

The distribution of Java includes the operation distribution and data distribution, in which the operation distribution refers to the arrangement of relevant operations on multiple different hosts, while the data distribution refers to the storage of data on multiple different hosts, which are different members of the network. Java can access network objects with URL (unified 1 resource locator) object in the same way as local system.

4. Portability

The Java program has architecture-independent features and can be easily ported to different computers on a network. At the same time, Java's libraries also implement interfaces for different platforms, making these libraries portable.

5. Interpreted

You need an interpreter to run the Java program. Any computer or other device that ports the Java interpreter can interpret and execute in Java bytecode. Bytecode is platform-independent and carries a lot of compile-time information on its own, making the connection process easier, the development process faster, and more exploratory.

6. Security

Java language removes the syntax such as pointer and memory release in C language, effectively avoiding illegal operation of memory. Java program can be run only after many test steps such as code verification and pointer verification, so it is impossible for unauthorized Java program to damage the system platform. Moreover, Java can be used to write anti-virus and anti-modification system.

7. Robustness

One of the goals of Java was to write a multifaceted, reliable application that would check for compile and run time errors and eliminate them. Type checking can help users detect many errors that occur early in development. The advent of integrated development tools such as Eclipse and Netbeans has also made it easier to compile and run Java programs.

8. Multithreading

Multithreading enables applications to perform multiple tasks in parallel at the same time, and the corresponding synchronization mechanism ensures that different threads can share data correctly. With multithreading, you get better interaction and real-time behavior.

9. The high performance

Java's compiled bytecode runs in the interpreter, so it is much faster than most interactive applications. In addition, bytecode can be translated into platform-specific machine instructions while the program is running, making it one step faster.

Dynamic 10.

Java is in many ways more adaptable to the evolving environment than C and C++, where methods in the library can be dynamically tweaked and variables added without any changes on the client side. Making dynamic adjustments in Java is very simple and straightforward.

That's all about the basic features of the Java language, so stay tuned!