Question :What are different types of inner classes?
Answer :Nested top-level classes, Member classes, Local classes, Anonymous classes Nested top-level classes- If you declare a class within a class and specify the static modifier, the compiler treats the class just like any other top-level class. Any class outside the declaring class accesses the nested class with the declaring class name acting similarly to a package. eg, outer.inner. Top-level inner classes implicitly have access only to static variables.There can also be inner interfaces. All of these are of the nested top-level variety. Member classes - Member inner classes are just like other member methods and member variables and access to the member class is restricted, just like methods and variables. This means a public member class acts similarly to a nested top-level class. The primary difference between member classes and nested top-level classes is that member classes have access to the specific instance of the enclosing class. Local classes - Local classes are like local variables, specific to a block of code. Their visibility is only within the block of their declaration. In order for the class to be useful beyond the declaration block, it would need to implement a more publicly available interface.Because local classes are not members, the modifiers public, protected, private, and static are not usable. Anonymous classes - Anonymous inner classes extend local inner classes one level further. As anonymous classes have no name, you cannot provide a constructor.
www.interviewhelper.org is a hope for all the Job seekers. Users can find unlimited here. These range from technical to HR, from functional to behavioral. www.interviewhelper.org contains in the fields like Ajax,VB,Networking,Sharepoint,JEE,Perl,Javascript,Bioinformatics,Classic ASP,Unix,Linux,Accounting,Oracle DBA,Microprocessor,Bluetooth,jms,jme,.net framework,ABAP,ASP,ASP.net,Basic .net Framework,Interview Questions,C language,C++,database,Oracle,Java,PHP,LAMP,SAP etc.
Thursday, February 12, 2009
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment