anonymous class

[payal sharma]

Which of the following statements are true?
A) An anonymous class cannot have any constructors
B) An anonymous class can only be created within the body of a method
C) An anonymous class can only access static fields of the enclosing class
D) An anonymous class instantiated and declared in the same place.
Here I can say A,C,D are correct
Please comment
thanks in advance

[Manfred Leonhardt]

Hi Payal,
I'll do more than comment, I will prove with a code example that the only correct answers are A and D.
The following code shows an anonymous class being created outside of any method (B) and also shows an anonymous class accessing both static and nonstatic variables of the enclosing class (C).

class Shape
{
  public void draw()
  {
    System.out.println( "Shape: draw" );
  }
}
public class A
{
  static String ss = "NewShape2";
  String ns = "draw";
  Shape s = new Shape()
            {
              public void draw()
              {
                System.out.println( "NewShape: draw" );
              }
            };
  public Shape method()
  {
    return( new Shape()
            {
              public void draw()
              {
                System.out.println( ss + ": " + ns );
              }
            } );
  }
  public static void main( String[] arg )
  {
    A a = new A();
    a.s.draw();
    a.method().draw();
  }
}

Regards,
Manfred.
[This message has been edited by Manfred Leonhardt (edited July 26, 2001).]

[Desai Sandeep]

A and D are correct, as Manfred has explained
-- Sandeep

[Jason Li]

Don't you guys think the example which manfred gave are created inside a method? The other place only get the return value which is created in the method. Why B is not the answer is because we can create anonymous class inside a class but out of any method ---in Initializer or Initializer block. So i think answer should be A, D.
Jason
[This message has been edited by Jason Li (edited July 26, 2001).]