| Parameter | JAR | WAR | EAR |
| File name | Java Archive File. | Web Archive File. | Enterprise Archive File. |
| Functions | Used to package classes and property files. | Used to package a web application. | Used to package EJB, JSP, Servlets etc. |
| Extension | .jar | .war | .ear |
| Files contain | Enterprise Java Beans(EJB) class files and EJB deployment descriptor. | Servlet class files, JSP files, supporting files, GIF and HTML. | All files of JAR and WAR. |
