Hmmm.
From: program-l-bounce@xxxxxxxxxxxxx [mailto:program-l-bounce@xxxxxxxxxxxxx] On ;
Behalf Of Andreas Stefik
Sent: November 28, 2018 2:27 PM
To: program-l@xxxxxxxxxxxxx
Subject: [program-l] Re: Java ????
Folks,
The explanations people have given so far are really close, but not quite
correct. In Java, an interface is different than an abstract class. Notably, an
interface tells the compiler that there are a list of methods that anything
inheriting must also have. Interfaces cannot be instantiated. An abstract class
in Java has some methods without an implementation, but have some with.Abstract
classes, as well, cannot be instantiated. IDETS is the name of the interface.
The reason Java made this decision was because classes can have as many
interfaces as they like, but only one abstract parent, because they don't allow
multiple inheritance like C++ does.
Breaking it down, this piece of code is an interface, named IDETS, that has one
method in it, named localA. Using it, one would "implement" the interface in a
subclass.
HTH,
Stefik
On Wed, Nov 28, 2018 at 9:34 AM Roger Woolgrove
<rawoolgrove@xxxxxxxxx<mailto:rawoolgrove@xxxxxxxxx>> wrote:
Hi
It is the basic framework of an interface.
In an interface there will be a number of mtthod headers ending with semi colon.
No code is given for the methods but any implementing class must specify a
definition for each of the methods stated.
No idea what IDETS means, usually there should be some annotation prior to the
declaration to say what the interface is for.
roger
On 28/11/2018 17:29, Corbett, James wrote:
I found this code in one of our old programs but it don’t make sense to me?
public interface IDets {
void localA();
}
Help?
J.
James (Jim) Corbett
613 941-2438
CS2 (Programmer - Analyst)
