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This article mainly explains "what are the architectures and versions of the Java platform". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let Xiaobian take you to learn "What are the architectures and versions of Java platform"!

Java is the Java programming language and Java platform introduced by Sun Microsystems in May 1995. Java implementation of the HotJava browser (Java applet support) shows the charm of Java: cross-platform, dynamic Web, Internet computing.

platform

The Java platform consists of the Java Virtual Machine and the Java Application Programming Interface (API). Java Application Programming Interface provides Java applications with a standard interface independent of the operating system, which can be divided into basic parts and extensions. Java applications can run after installing a Java platform on a hardware or operating system platform. The Java platform is now embedded in almost all operating systems. Java programs can be compiled once and run on a variety of systems. Java API has evolved from version 1.1x to version 1.2. The current Java platform is based on Java 1.5, with the latest version being Java 1.7.

Java is divided into three systems JavaSE(Java2 Platform Standard Edition, Java Platform Standard Edition), JavaEE(Java 2 Platform,Enterprise Edition, Java Platform Enterprise Edition), JavaME(Java 2 Platform Micro Edition, Java Platform Micro Edition).

Java SE

Java SE（Java Platform，Standard Edition）。Java SE was formerly known as J2SE. It allows development and deployment of Java applications for use in desktop, server, embedded and real-time environments. Java SE contains classes that support Java Web Services development and provides the foundation for Java Platform, Enterprise Edition(Java EE).

Java EE

Java EE（Java Platform，Enterprise Edition）。This version was formerly known as J2EE. Enterprise Edition helps develop and deploy portable, robust, scalable, and secure server-side Java applications. Java EE is built on Java SE and provides Web services, component models, management and communication APIs that can be used to implement enterprise-level service-oriented architecture (SOA) and Web 2.0 applications.

Java ME

Java ME（Java Platform，Micro Edition）。This version was formerly known as J2ME. Java ME provides a robust and flexible environment for applications running on mobile and embedded devices such as mobile phones, PDAs, TV set-top boxes, and printers. Java ME includes a flexible user interface, a robust security model, many built-in network protocols, and rich support for networked and offline applications that can be downloaded dynamically. Applications based on the Java ME specification need only be written once, can be used on many devices, and can take advantage of the native capabilities of each device.

All in all, these three versions of the Java platform enable software developers, service providers, and device manufacturers to develop for specific markets. In fact, we should always remember that Java is not only designed for the Internet, www, it can also be used to write stand-alone applications. Java's functions are powerful.

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