In a new Module (using IJ 7.0.4), I have the JDK set up as 1.6.0_07. The JDK's platform settings shows the 14 JDK jar files included in the classpath, including the all important rt.jar.
But when editing java source code, all of the JDK classes are marked in RED as not found, e.g. java.lang.String, java.lang.Integer, java.lang.Thread, etc.
So, I'm not sure:
what did I do wrong in creating this module
what configuration tweak is required to correct the issue.