Is this Assignment legal

[priti manas duddilla]

Can some one please clarify, if the assignment at line 1 is legal?
Also please do tell me the o/p.

 
interface face { void meth(); }
class tester extends test implements face 
{ public void meth(){System.out.println("hello");}}
 
class test
{
public static void main( String args[] )
{
test test_one = new tester();
face f = test_one; // 1
f.meth();

}
}
 

[ahmed yehia]

You would need a cast like this:

    
face f = (face)test_one; // 1

[priti manas duddilla]

Ok, if i cast it, is the output "hello" ?
because test class is not implementing the interface.

[ahmed yehia]

watch this code:

   
test test_one = new tester(); // 1
face f = (face)test_one; // 2
f.meth();

At line 1 you are creating a polymorphic object of type test that refers to an object of type tester which implements the interface.
At line 2 you are casting that object to interface so its ok.
output: hello

[priti manas duddilla]

Oh! My mistake.

Thanks got it.