To extend my own question I think this is a bug since thre is no way
for a programmer to intialize the enclsing instance variable.
I think that Object should have a methos added.
getEnclosingInstance()
Then you coud do ..
public void callFooBar(){
if( OuterClass.this == null ) {
OuterClass.this = getEnclosingInstance();
}
System.out.println(" Parent2 Foobar " +OuterClass.this);
}
My point being that the subclass should alwas be able to access its enclosing
class.
The probelm is thre is no way for a prgrammer to init the instance variable
that I know of.
This does not work either
class Parent2 extends Parent1 {
Parent2( OuterClass outer ) {
outer.super();
}
public void callFooBar(){
System.out.println(" Parent2 Foobar " +OuterClass.this);
}
}
Anyway I think it is a bug.
Michael Emmel wrote:
> This generates the following output ..
>
> Parent2 Foobar null
>
> I understand why but it compiles and fails at runtime.
> Thus if you subclass a class with and inner class any method used is the
> parents consturctor cannont
> acces the Outer class.
>
> Of course I may be doing something stupid but I know the instance.super
> stuff and this is the referse case.
> It seems a bit pathalogical and also it compiles fine even though it
> will never run.
> The null pointer excetion if you access OuterClass.this is not exactly
> helpful either.
>
> Any thoughts ??
>
> Mike
>
> class Parent1 {
>
> public Parent1(){
> callFooBar();
> }
>
> public void callFooBar(){
> System.out.println(" Parent1 Foobar");
> }
>
> }
>
> public class OuterClass {
>
> class Parent2 extends Parent1 {
>
> public void callFooBar(){
> System.out.println(" Parent2 Foobar " +OuterClass.this);
> }
>
> }
>
> public OuterClass() {
>
> Parent2 p2 = new Parent2();
> }
>
> public static void main( String[] args ) {
> OuterClass test1 = new OuterClass();
>
> }
>
> }
>
> ----------------------------------------------------------------------
> To UNSUBSCRIBE, email to [EMAIL PROTECTED]
> with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
----------------------------------------------------------------------
To UNSUBSCRIBE, email to [EMAIL PROTECTED]
with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
