argument anonymous class

[Shiva Mohan]

    
class Place{
int i=1;}
 public class Chapter8 {
      public static void main(String[] args) {
          Chapter8  t=new Chapter8 ();
          Place p=new Place(new Runnable(){
             public void run(){
                 System.out.println(t.p.++i);//how could i access i,inside anonymous inner class method
             }
             
          });
      }
 }

[Keith Lynn]

I don't understand what you are trying to do.

Place doesn't have a constructor that accepts a Runnable.

[Chandra Bhatt]

I agree with Keith,
Code is erroneous, and question ambiguous!


Please clarify the question with complete code at least!





cmbhatt

[Shiva Mohan]

Thanks for the reply Keith.your reply made me think a lot.
Now

class Place{
int i=1;
Place(Runnable r){}
}
public class Chapter8 {
public static void main(String[] args) {
Chapter8 t=new Chapter8 ();
Place p=new Place(new Runnable(){
public void run(){
System.out.println(++i);//how could i access Place.i,inside anonymous inner class method
}

});
}
}
anonymous reference p having referencetype Place.Correct?
then is there a way to access Place.i ,inside anonymous class.

[Burkhard Hassel]

Hi ranchers,

Shiva asked:
h

ow could i access Place.i,inside anonymous inner class method?

Not in the way you tried here.
i is a field in class Place, you are just referring i from the Runnable that does not have an i.
But if you said
System.out.println(++p.i),
it wouldn't work either,because p is method local (local to the main method).
Inner classes can access method local variables only if they are final.
But even if you made Place p final it wouldn't work. Because then you try to access p when it is not yet initialized. And this also won't work in a method local variable.

Perhaps give class Chapter8 an instance field Place p. If you then make your Chapter8 final, it may parially work.


More todo:
All your efforts so far will point to nowhere, because the Runnable provided to the constructor is just lost in the constructor. class Place does nothing with it and it cannot be passed to a thread.
So perhaps class Place needs also a field of type Runnable...


Yours,
Bu.