To change port number to default / course-standard:
Go to program group from windows task bar:
start/All Programs/Sun Microsystems/Application Server PE 9
run app: Start Default Server
run app: Admin Console - opens window in default browser
log on: - default user is admin, password is adminadmin
In the Common Tasks tree open the nodes: Configuration/HTTP Service/HTTP Listeners
Click http-listener-1, change port number to 8080, Click Save button
close Admin Console, close Server.
See http://docs.sun.com/app/docs/doc/819-3658/ablsw?a=view for HTTP configuration details.