About Question enthuware.ocajp.i.v7.2.1315 :

[The_Nick]

Hi,
Regarding nested class, are they part of the OCAJP? I thought they were not included but instead they were part of the OCPJP exam.

[admin]

They are not explicitly mentioned but some students have reported getting a question on it. So better to know the basics than to be surprised in the exam.

[Ambiorix]

I don't understand why int i isn't accessible from perform_work(); if it's not declared as final.

What rule/logic is at play here?

[admin]

I don't understand why int i isn't accessible from perform_work(); if it's not declared as final.

What rule/logic is at play here?

The rule is that if you want to access a method parameter in an inner class defined in that method, the parameter must be final.

[fasty23]

I don't understand why int i isn't accessible from perform_work(); if it's not declared as final.

What rule/logic is at play here?

The rule is that if you want to access a method parameter in an inner class defined in that method, the parameter must be final.

Would you please help me to understand this?

[admin]

Code: Select all

public class TestClass {
    public static void main(final String[] args) { 
        class Inner{
            void m(){
                System.out.println(args); //this will work ONLY if args is final
            }
        }
        
        new Inner().m();
    }
}

[fasty23]

Code: Select all

public class TestClass {
    public static void main(final String[] args) { 
        class Inner{
            void m(){
                System.out.println(args); //this will work ONLY if args is final
            }
        }
        
        new Inner().m();
    }
}

thank you.
What is the logic?

[admin]

JLS hasn't elaborated on the rule. You may go through section 8.1.3 though: http://docs.oracle.com/javase/specs/jls ... ml#d5e9405