Abstract methods and classes
While going through the java language programming you have learned so many
times the word abstract. In java programming language the word abstract is used
with methods and classes.
Abstract Method
An abstract method one that have the empty implementation. All the
methods in any interface are abstract by default. Abstract method provides the standardization
for the " name and signature" of any method. One can extend and implement to these methods in
their own classes according to the requirements.
e.g.
public abstract abs_value();
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Abstract Class
In java programming language, abstract classes are those
that works only as
the parent class or the base class. Subclasses are derived to implement the
methods inherited from the abstract class (base class). Abstract classes are not
instantiated directly. First extend the base class and then instantiate (create
objects). Abstract classes are
generic in nature and implement to those methods that are
used commonly by the subclasses with common implementation. Abstract classes .
e.g.
abstract class A{
public abstract abs_value();
void show(){
System.out.println("This is an abstract class");
}
} |
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Current Comments
2 comments so far (post your own) View All Comments Latest 10 Comments:This site is very useful to learn java from scratch.thanks .update more.
Posted by none on Sunday, 02.17.08 @ 23:56pm | #48843
This site is good to learn about java... Thank u..
Posted by Muthukumar.D on Friday, 02.8.08 @ 17:01pm | #47610