What are different types of inner classes? - Java

Started by sukishan, Jul 15, 2009, 07:13 PM

previous topic - next topic
Go Down

sukishan

What are different types of inner classes?

A: 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
A good beginning makes a good ending

kimseane

I am impressed by the information of the different types of inner classes. This Three different types of inner classes include really very Good Information. I like this Post.

Go Up
 

Quick Reply

With Quick-Reply you can write a post when viewing a topic without loading a new page. You can still use bulletin board code and smileys as you would in a normal post.

Warning: this topic has not been posted in for at least 120 days.
Unless you're sure you want to reply, please consider starting a new topic.

Note: this post will not display until it's been approved by a moderator.
Name:
Email:
Verification:
Please leave this box empty:

Type the letters shown in the picture
Listen to the letters / Request another image

Type the letters shown in the picture:

shortcuts: alt+s submit/post or alt+p preview
IT Acumens | GinGly :: SMS Backup | Acumen :: Discussion Board | AshokPillar :: Hosting | CineBuzz :: Latest Cinema News | My Kids Diary :: Capture your kids magical moment
Copyright 2005 - 2017 :: IT Acumens :: All Rights Reserved.
ITAcumens Forum with 2 lakhs post running for 10 years - Powered by HostGator Dedicated Server