Inner Class and Final Variables

[gunjan]

I read this on one of the websites. I am not able to figure it out
"An inner class can access only those local variables and parameters, that are declared as final."
Can some one explain with some example.
Best regards
Gunjan

[Tony Alicea]

They mean inner LOCAL classes, not ALL inner class types. Local classes are classes defined inside methods. For a local variable of the method to be used inside a local class defined inside that method, it has to be final:
<PRE>
public class Test {
public void oneMethod(final int x) {
int localInt=0;
final int anotherInt=0;
class LocalClass{
// int ii = localInt; < - CANNOT USE NON-FINAL VARIABLE
int jj = anotherInt;
int kk = x;
}
}
}
</PRE>

[Jim Yingst]

...and just to clarify, the term "local classes" includes anonymous classes, but excludes member classes and top-level nested classes.

[Thiru Thangavelu]

Top level nested class means static member class only. isn't?

[john sham]

Originally posted by Thiru Thangavelu:
Top level nested class means static member class only. isn't?

Yes, Top level nested class means static class members.

[Francisco A Guimaraes]

just a doubt in semantics:
when you say "member class", is that a more general term or is it specific to non-static, non-local inner classes?
Francisco

[Igor Romanov]

That is because if the inner class defined in the method's scope, than an object of that class can possibly outlives the method invocation.