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Is this Assignment legal

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

 
Ranch Hand
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You would need a cast like this:
 
priti manas duddilla
Greenhorn
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Ok, if i cast it, is the output "hello" ?
because test class is not implementing the interface.
 
ahmed yehia
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watch this code:

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
Greenhorn
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Oh! My mistake.

Thanks got it.
 
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