GlassFish in Eclipse complains “GlassFish v3 requires a JDK 1.6 and not a JRE”

Question

I am running:

• Eclipse Java EE IDE for Web Developers.
• Version: Helios Service Release 2
• Build id: 20110218-0911

I have also in

Answer 1

It took me a while to find where this is configured in eclipse so I'll note it here for everyone:

Window menu > Preferences dialog > Server section > Runtime Environments subsection.