Java is a general-purpose computer programming language that is concurrent, class-based, object-oriented, and specifically designed to have as few implementation dependencies as possible. It is intended to let application developers "write once, run anywhere" (WORA), meaning that compiled Java code can run on all platforms that support Java without the need for recompilation.
Different Editions of Java Platform:
• J2SE (Java Platform, Standard Edition)
Also known as Core Java, this is the most basic and standard version of Java. It’s the purest form of Java, a basic foundation for all other editions. It consists of a wide variety of general purpose API’s (like java.lang, java.util) as well as many special purpose APIs. J2SE is mainly used to create applications for Desktop environment. It consist all the basics of Java the language, variables, primitive data types, Arrays, Streams, Strings Java Database Connectivity(JDBC) and much more. This is the standard, from which all other editions came out, according to the needs of the time.
• J2EE (Java Platform, Enterprise Edition)
J2ME (Java Platform, Micro Edition)
This version of Java is mainly concentrated for the applications running on embedded systems, mobiles and small devices. Also, the J2ME apps help in using web compression technologies, which in turn, reduce network usage, and hence cheap internet accessibility. J2ME uses many libraries and API’s of J2SE, as well as, many of it’s own. The basic aim of this edition was to work on mobiles, wireless devices, set top boxes etc. Old Nokia phones, which used Symbian OS, used this technology.
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