Can a reference variable of an interfece holds the address of an object of a class that implements that interfaceExampleclass X implements Y{ //Method Implementations of Interface public static void main(String args[]) { Y y=new X(); }}

questioninterest
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Aug 4th, 2006
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Pardhas
Profile Answers by Pardhas

Aug 13th, 2006

Yes. reference variable of an interfece holds the address of an object of a class that implements that interface

Radhakrishna

Nov 9th, 2006

yes reference variable of interface type can hold the address of the object of a class which implements that interface but we can call the only those methods which are declared in that interface and implemented in that class we can't call the methods which are defined in that class and which are not declared in that interface.
The belove example will help u in a better way
interface I{
void meth1();
}
class A implements I {
public void meth1(){
System.out.println("method declared in the interface");
}
public void meth2(){
System.out.println("method not declared in the interface");
}
}
public class test{
public static void main(String[] args){
I obj=new A();
obj.meth1();//legal
obj.meth2();//illegal
}
}