Eclipse Updating the compiler compliance to 1.7

Question

I am having some trouble updating the compiler compliance of my eclipse workspace (I am actually using RTC, but it is essentially eclipse). Currently, it uses a jdk of 1.6 so I

Answer 1

The Compiler compliance level is Version Dependent in eclipse. If you are using Eclipse 3.7 or lower then you won't get 1.7 compliance. Use Eclipse JUNO or higher.

For more on JDT Core 7 and its release related information

UPDATE:

Even eclipse 3.7.1 version supports Java 7 features and compliance level.