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JavaRanch » Java Forums » Certification » Programmer Certification (SCJP/OCPJP)
Bookmark "Inner Classes." Watch "Inner Classes." New topic
Author

Inner Classes.

neha kanwal
Greenhorn

Joined: Jan 30, 2007
Posts: 11
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.



Answer: BE
My Answer: CE
Chandra Bhatt
Ranch Hand

Joined: Feb 28, 2007
Posts: 1707
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


cmbhatt
 
It is sorta covered in the JavaRanch Style Guide.
 
subject: Inner Classes.