What is J2SE?

J2SE is a collection of Java Programming Language API (Application programming interface) that is very useful to many Java platform programs. It is derived from one of the most dynamic programming language known as "JAVA" and  one of  its three  basic editions of  Java known as Java standard edition being used for writing Applets and other web based applications.   

J2SE platform has been developed under the Java umbrella and primarily used for writing applets and other Java-based applications. It is mostly used for individual computers. Applet is a type  of  fast-working subroutine of  Java  that is  platform-independent but  work within other frameworks. It is a   mini applications that perform a variety of functions, large and small, ordinary and dynamic, within the framework of larger applications. 

J2SE provide the facility to users to see Flash movies or hear audio files by clicking on a Web page link. As the user clicks, page goes into the browser environment and begin the process of launching  application-within-an-application to play the requested video or sound application. So many online games are being developed on J2SE. JavaBeans can also be developed by using J2SE.