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

I use eclipse 3.6.1 with installed JRE 1.7 and I was able to set Java compliance level to 1.7 (on the workspace level - preferences).
In some workspaces I could do that right in the Preferences, in some workspaces I had to do that in a "hard way" updating several properties in the file: .metadata\.plugins\org.eclipse.core.runtime\.settings\org.eclipse.jdt.core.prefs
Here are changed lines: org.eclipse.jdt.core.compiler.compliance=1.7 org.eclipse.jdt.core.compiler.source=1.7 org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.7

Maybe it was just enough to change the line with "org.eclipse.jdt.core.compiler.compliance" property , but I did all three for the sake of completeness and consistency.