Missing Java libraries? macosx-port

[Wayne Stange]

I am running IntelliJIdea 10.5 under Mac OS 10.7.

I installed the v7 sdk after loading the OpenJDK image from the OpenJDK
download site and followed the install instructions which seemed to work out
OK. I have v7 64 bit set as my first Java preference

I then changed my SDK in IntelliJIdea to 1.7.0 which it is OK with. However,
when I try to compile existing code the compiler does not recognise any of
the Java classes e.g. String, ArrayList etc... i.e. anything that is
packaged under java.*  I also noticed that were many fewer jar files
associated with the 1.7.0 JDK once I had installed this in IntelliJ compared
to 1.6.0....

Am I missing somethings? I would have assumed that all of the"built-in"
class libraries are an implicit in the JDK???

Any help would be appreciated.

regards

Wayne