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Abstract classes and Interfaces

Rashmi Dupati
Greenhorn

Joined: Mar 05, 2007
Posts: 22
Hello

Can you please answer my questions:

1.What is the difference between Abstact classes and Interfaces.in program how we are going to decide which one to create?and when to use interfaces and when to use absract classes?(In programmatically)

2.can we declare variables in interface?

thanks & regards
Rashmi
Thomas Thevis
Ranch Hand

Joined: Sep 02, 2008
Posts: 87
Hello Rashmi,

please use the forum's search function. This question has been posted several times in the last weeks. Please read these posts first. If you still have questions afterwards, come back and post them.

Best Regards,
Thomas


SCJP 5.0, SCJD in progress
Campbell Ritchie
Sheriff

Joined: Oct 13, 2005
Posts: 38412
    
  23
Have a look at this FAQ; if there is anything you don't understand come back.

But a search of this forum will find several very similar old threads.
 
It is sorta covered in the JavaRanch Style Guide.
 
subject: Abstract classes and Interfaces