What is the differentiate between .ear, .jar and .war files.?

These files are simply zipped file using java jar tool. These files are created for different purposes. Here is the description of these files: .jar files: These files are with the .jar extenstion. The .jar files contains the libraries, resources and accessories files like property files. .war files: These files are with the .war extension. The war file contains the web application that can be deployed on the any servlet/jsp container. The .war file contains jsp, html, javascript and other files for necessary for the development of web applications. .ear files: The .ear file contains the EJB modules of the application.