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> ## Java EE Application Assembly and Deployment

> A Java EE application is packaged into one or more standard units for deployment to any Java EE platform-compliant system. Each unit contains:

> - A functional component or components (enterprise bean, JSP page, servlet, applet, etc.)
> - An optional deployment descriptor that describes its content

> Once a Java EE unit has been produced, it is ready to be deployed. Deployment typically involves using a platform's deployment tool to specify location-specific information, such as a list of local users that can access it and the name of the local database. Once deployed on a local platform, the application is ready to run.