Class Outer{int a;Outer (){a=10;}public static void main(String args[]){final Outer o1=new Outer();Outer o2=new Outer();class inner{inner(){o1.a=20;//allowed//o2.a=30; not allowed}}}}Why inner classes can access only final variables as illustrated? Thanks in advance!

sunil_dalvi82
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May 8th, 2006
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omaha_inky
Profile Answers by omaha_inky

Jun 1st, 2006

From www.javaranch.com:
The inner class can't use local variables from the method in which the inner class is defined!
After all, at the end of that method, the local variables will be blown away. Poof. Gone. History. That inner object you created from that inner class might still be alive and kickin' out on the heap long after that local variable has gone out of scope.
You can, however, use local variables that are declared final, because the compiler takes care of that for you in advance. But that's it -- no method parameters from that method, and no local variables.