abstract

[aparna rudra]

hii

i have a question here.


if a calss is abstarct, then the class that extends the abstract class should implemnt all the methds. or the class itself should be declared as abstarct.



how come this program compiles and generates an ouput?
here class is abstarct, public void another() is also considered as abstract? is that so. eventhough not declared as abstract. cos class is abstarct. n only MYFUNC IS THE OUTPUT HOW?

unable to understand this anyone please explain it.

abstract class Base
{     
    abstract public void myfunc();    
    public void another()
    {     
        System.out.println("Another method");   
    }
}
    
public class Abs extends Base
{
    public static void main(String argv[])
    {   
        Abs a = new Abs();      
        a.amethod();     
    }
   
    public void myfunc()
    {      
        System.out.println("My Func");     
    }   
 
    public void amethod()
    { 
        myfunc();       
    }
}

Edited by Corey McGlone: Fixed misspelled subject and added CODE tags.
[ May 28, 2004: Message edited by: Corey McGlone ]

[Corey McGlone]

An abstract class can define both abstract and non-abstract methods. Any subclass of an abstract class must either implement all of the abstract methods defined in the superclass or it must also be declared as abstract. There is no need for the subclass to override the non-abstract classes in the parent class.

In this example, the subclass does define a body for the one and only abstract method. There is no requirement to override the other method.