Clarification with interfaces.

[priyaguptan]

Hi,

Suppose i have a prog like this:

interface Content
{
int i=9;
void publish();
}
class Article implements Content
{
void publish(){
/*Some code*/
}
}
class Blogs implements Content
{
void publish()
{
/* Some code*/
}
.
.
.
.
.
.
.

now if there are n number of classes which implement the interface Content and among these classes i want the implementation of publish() method only in n/2 number of classes then it is not possible to declare all the rest of the n/2 classes as abstract as the number of classes is huge but at the same time i want to make use of 'i' also...what is the solution for this?

[albinjoseph]

I think the solution to your problem is to create a class which implements Content and give an empty implementation for publish method. Then extend all your classes from this base class. Now in n/2 number of classes implement the publish method as required.

[priyaguptan]

Could u please elaborate a little further if possible with an example, Albin?

[albinjoseph]

What I mean is something like this.

[java]
interface Content {
int i=9;
public void publish();
}

class ContentImpl implements Content {
public void publish() {
// Do nothing here.
}
}
class Article extends ContentImpl {
public void publish(){
/* Some code */
}
}
class Blogs extends ContentImpl {
public void publish() {
/* Some code */
}
}

class SomeOtherContent extends ContentImpl {

}
[/java]

[priyaguptan]

Ok now I got it..Thanks a lot.