Understanding Containers
When you previously installed J2EE, you also installed Sun Microsystems' reference implementation of J2EE, which is a J2EE Product. All J2EE products must provide containers to house J2EE components. The role of the container is to provide a component with the resources it needs to operate and a runtime within which to execute; yet still provide a degree of protection (security) to the application host.
Containers provide a number of services for a component. These services include lifecycle management, threading, security, deployment, and communication with other components. In addition to these services, a container must provide components with Java compatible runtime that conforms to J2SE 1.3.
Different components ...
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