Inner Classes.

[neha kanwal]

Which of the following are TRUE about inner class? Mark
I found this question in one of the books. Can anyone pls calrify my doubts about this query.

Please select two correct answers.  
 
  A :  Inner classes can only be instantiated in its outer class.  
  B :  Anonymous inner classes declare and instantiated at the same place.  
  C :  Anonymous inner class can be both an explicit subclass and implements an interface.  
  D :  An inner class can be static only when it's outer class is static.  
  E :  Inner classes can be protected or private.  
 

Answer: BE
My Answer: CE

[Chandra Bhatt]

Hi Neha!

Answers B and E are correct.

An anonymous class can extend a class or implement an interface at a time not both.

An inner class can be instantiated outside of a class provided it is not private but only using the reference of the outer class. That is you must create an instance of the outer class to instantiate the inner class. This is the case of (non static inner class). To instantiate a static inner class you dont require to first instantiate the outer class. You do like this:

Outer.inner in = new Outer.inner(); //inner is static

Regards,
CMBHATT