Summarize the differences between Java SE, Java EE, and Java ME

This article distinguishes between JAVA SE, JAVA EE, and JAVA ME, and also shares some of the author's achievements. The current Java platform can be divided into three versions: JAVA SE, JAVA EE, and JAVA ME according to software developers, service providers, and device manufacturers for specific markets.

1. Java SE (Java Platform, Standard Edition).

It was originally called J2SE, but after the JDK1.5 version, it was renamed Java SE because that 2 has lost its original meaning. J2SE contains the classes that form the core of the Java language. For example: database connections, interface definitions, input/output, network programming; Java applications used in servers, embedded environments 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).

2. Java EE (Java Platform, Enterprise Edition).

It was previously called J2EE. J2EE should be the technical specification developed by JAVA2 enterprises. It not only has more classes than the standard version. J2EE also includes many components, such as Jsp, Servlet, JavaBean, EJB, JDBC, JavaMail, etc. The Enterprise Edition helps develop and deploy server-side Java applications that are portable, robust, scalable, andsecure. Java EE is built on the basis of Java SE. It provides Web services, componentmodel, management and communicationAPI, and can be used to implement enterprise-level service-oriented architecture (service -oriented architecture (SOA) and Web 2.0 applications.

3. Java ME (Java Platform, Micro Edition).

Previously called J2ME, J2ME includes some classes in J2SE and is used for software development of consumer electronics products. For example: pagers, smart cards, mobile phones, PDAs, set-top boxes. Java ME provides a robust and flexible environment for applications running on mobile and embedded devices such as cell phones, PDAs, television 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 can be written once for many devices and take advantage of each device's native capabilities.

Summary: J2SE is included in J2EE, and J2ME includes the core classes of J2SE, but some new proprietary class applications have been added, and the coverage of the API varies. Generally speaking, it can be understood like this: J2SE is the foundation; if it is compressed a little and adds some features such as CLDC, it is J2ME; if it is expanded a little bit, and some features of enterprise applications such as EJB are added, it is J2EE.

To put it more simply

Java SE is a software that runs on a computer.

Java EE is used to make websites - (our common JSP technology)

Java ME is used to make mobile software.

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