J2EE applications are made up of components. A J2EE component is a self-contained functional software unit that is assembled into a J2EE application with it's related classes and files and that communicates with other components. The J2EE specification defines the following J2EE components:
- Application clients and applets are components that run on the client.
- Java servlet and Java server pages(JSP) technology components are web component that run on server.
- Enterprise Java Beans (EJB) components (enterprise beans) are business components that run on the server.
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