clear my doubt

[VIGNESHWAR VISWANATHAN]

new can be used with interface to return the object of other class or not....
please share your views... thank you

[John Stone]

I don't understand your question.

Are you reffering to creating anonymous classes using interfaces or to upcasting created objects to interface they implement?

[raj malhotra]

Hi
Please specify proper subject line and make sure you read your message atleast once before posting .
Thanks

[VIGNESHWAR VISWANATHAN]

interface Animal
{
void soundOff();
}
class Elephant implements Animal
{
public void soundOff()
{
System.out.println("Trumphet");
}
}
class Lion implements Animal
{
public void soundOff()
{
System.out.println("Roar");
}
}
class Alpha1
{
static Animal get(String choice)
{
if(choice.equalsIgnoreCase("meat eater"))
{
return new Lion();
}
else
{
return new Elephant();
}}}

which compiles?
A. new Animal().soundOff();
B.Elephant e=new Alpha1();
C.Lion 1=Alpha.get("meat eater");
D.new Alpha1().get("veggie").soundOff();

this is the code... here i have learnt that in option A. you cannot use new ininterface...Is it so?

[John Stone]

Yes it is, you can not create instance of interface. (Interface methods have no body, what would they do?)

[anil kumar]

Hi

VIGNESHWAR

There are no constructors for interfaces.So can't create an object.


Thanks

Anil Kumar

[Jesper de Jong]

Originally posted by VIGNESHWAR VISWANATHAN:
which compiles?
A. new Animal().soundOff();
B.Elephant e=new Alpha1();
C.Lion 1=Alpha.get("meat eater");
D.new Alpha1().get("veggie").soundOff();

Such questions can easily be answered by simply trying it out. Write a small Java program with the lines mentioned under options A to D, try to compile it and see what the compiler says.