Differences between Java 2 platform J2SE, J2EE, and j2s

This article briefly introduces the differences between J2SE, J2EE, and j23. most programming languages have pre-compiled class libraries to support various specific functions. In Java, class libraries use packages) different Versions of Java provide different packages for specific applications.

J2SE, J2EE, and j2s

Most programming languages have pre-compiled class libraries to support a variety of specific functions. In Java, class libraries are provided in the form of package. Different Versions of Java provide different packages, to target specific applications.

The Java2 Platform consists of three versions: Standard Edition J2SE, Enterprise Edition J2EE, and mini edition j2s:

J2SE is the standard version of Java2 and is mainly used for programming desktop applications;

Mainly used for embedded system development, such as mobile phone and PDA programming;

J2EE is the Enterprise Edition of Java2. It is mainly used for the development of distributed network programs, such as e-commerce websites and ERP systems.

◆ StandardEdition (Standard Edition) J2SE Contains classes that constitute the core of the Java language.

For example, database connection, interface definition, input/output, and network programming

◆ EnterpriseEdition (Enterprise Edition) J2EE includes classes in J2SE and also the classes used to develop enterprise-level applications.

For example: EJB, servlet, JSP, XML, transaction control

◆ MicroEdition (micro-scale version) J2SE contains one category for software development of consumer electronic products.

For example, pager, smart card, mobile phone, PDA, and set-top box

Their scope is: J2SE is included in J2EE, and J2SE contains the J2SE core class, but some new proprietary classes are added.

In application scenarios, the API coverage varies.

In general, we can understand it as follows:

J2SE is the Foundation;
One point of compression, and some other CLDC features are added;
One more step is to add some enterprise applications such as EJB, Which is J2EE.

To add one point, J2EE is more appropriate. It should be the technical specification developed by JAVA2, not just a few more classes than the Standard Edition.