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Abstract classes

Keshan Pillay

Joined: May 21, 2008
Posts: 29
Hello everyone!

Could someone please explain what an abstract class is and what it's used for? I'm having trouble grasping the concept. I've also been unable to find anything online that is helpful to me personally. If think something might help, please link!

Many Thanks
Sherif Shehab
Ranch Hand

Joined: Mar 05, 2007
Posts: 484

Hi check this link Abstract class

kayanaat sidiqui
Ranch Hand

Joined: Sep 04, 2008
Posts: 122
Hi Pillay,
Abstract class are those class which may contain abstarct methods, and abstract methods are those which don't have definition.

Since abstract class is partially implemented so it can't be instantiated.
In real world it is used for giving default behavior to the implememnting class.
Note that it's not necessary for an abstract class to have abstract method.

If you are newbie to java just start with Head first, then go ahead with "thinking in java" by bruce eckel and scjp exam study guide by kathy.
For any other help just send me private messages, i'll defietly help you out.

[edit]Add code tags. CR[/edit]
[ October 14, 2008: Message edited by: Campbell Ritchie ]
Campbell Ritchie

Joined: Oct 13, 2005
Posts: 46323
Please use the code button when posting code; you can see how much better it looks with the indentation.
And please keep all discussion on the forum; everybody can then learn from it.
I agree. Here's the link:
subject: Abstract classes
It's not a secret anymore!