Advantages of Nesting Interfaces ?

[Murgan Sub]

Have a look at this code below
interface E {
interface G {
void f();
}
interface H {
void f();
}
void g();

}

[Valentin Crettaz]

And?
What is exactly your question? Elaborate please.

[Murgan Sub]

What are the advantages of nesting interfaces?

[Valentin Crettaz]

There are very few examples of nested interfaces. A "well-known" one is for instance Map.Entry within interface Map (in java.util).
Some will say that nested classes (or interfaces) provide a better organization of your code and allow to avoid namespace pollution. It's more a matter of taste in my opinion.
Inner class Spec:
http://java.sun.com/products/jdk/1.1/docs/guide/innerclasses/spec/innerclasses.doc.html
Inner class chapter from KM:
http://developer.java.sun.com/developer/Books/certification/certbook.pdf
Some articles on that topic:
http://www.javaworld.com/javaworld/javatips/jw-javatip50.html
http://c2.com/ppr/wiki/JavaIdioms/ImmutableInterface.html
http://www.dcs.ed.ac.uk/teaching/cs3/ipcs/APJ/apj9.pdf
[ February 11, 2002: Message edited by: Valentin Crettaz ]