Java SE formerly popular as Java 2 Platform, Standard Edition or J2SE.Java Platform, Standard Edition (Java SE) is a computing platform device for the development and deployment of portable code for computing environments built upon desktop and server. The JSE formerly J2SE, uses Java programming language and is part of the Java software-platform family. Java SE defines a range of general-purpose API and also includes the Java Language Specification and the Java Virtual Machine Specification. One of the most well-known implementations of Java SE is Oracle Corporation's Java Development Kit (JDK). J2SE is used primarily for writing applets and other applications