class in the interface

[amar nath jha]

what is the role of class declared inside an interface.
Is it final?

[gaurav abbi]

hi,
even i'm curious about the purpose, but anyway i wrote this dummy code which worked fine, so they are not private, one thing i can say.

interface IQuest{
class MyQuest{
int iTest;
void myQuestMethod1(){
}
}
}

public class Quest implements IQuest{
public static void main(String[] args){
IQuest.MyQuest obj = new MyQuest();
obj.myQuestMethod1();
obj.iTest = 10;
}
}