Java is a programming language and the platform.Java is simple high level,robust ,secured and object oriented language.

Platform- Any hardware or software environment in which aprogram runs. Java has its own runtime environment i.e., JRE(Java Runtime Environment) and API, thus Java is platform

Types of Java Application

1. Standalone Application
   Application for Desktop or window based
2. Web Application
   Application that runs on server e.g ., servlets, JSP etc...
3. Enterprise Application
   Distributed application in nature e.g., banking
4. Mobile Application
   Application for mobile e.g., android, Java ME.