In Eclipse you can configure numerous servers to run inside the IDE, including Tomcat. Depending on your Tomcat configuration, at some point in the life cycle of a webapp your J
You will find it in
projectworkspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0
This is the default place where Eclipse 3.4 publishes the project. However, this can be changed by changing the settings in your 'Server' view.