Whenever I configure a new Eclipse install, I get a strange error the first time I use JSP files. Eclipse complains that I have to configure it to use a JDK, even though a JDK is obviously installed (Otherwise how could it compile Java class files?).
The fix is to go to Preferences – Java – Installed JREs. Click on the first JRE entry, press Edit, and navigate to the base JDK directory. After you save the setting restart Eclipse, and everything will work.
