1.6 How to Add Jars

Jars are physical aggregations and you don't need to worry about them unless you are building very large applications and the architect decides that you need to split all the classes into separate areas.

Jars fall into two categories in J2EE, ejb jars and ui jars. An ejb jar holds all the information about the service and persistence layers. A ui jar holds all the information about the presentation layer. If you don't add a ui-jar or an ejb jar, JeeWiz will add one for you.

If you particularly want to model them explicitly they should be added as a component like the application and stereotyped as ejb-jar and ui-jar respectively.

1. Unless your architect tells you things are getting too big for a single jar, don't bother with these.

• How to add general application information
• How to name names

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