I am wondering if someone could explain something about a class cast for me.
I am playing around with Android and I have a subclass of Application named ExApp.
I want to call a method of ExApp from one of my activities, so I do:
ExApp ex = ((ExApp)getapplication());
What I don't understand is why I need a double set of parentheses? Why can't I just:
ExApp ex = (ExApp)getApplication();
?
Thanks.
You can. The two statements are exactly the same.
Where you'd see a difference is if you were calling a method on the result, e.g.
(ExApp) getApplication().foo();
is different to:
((ExApp) getApplication()).foo();
In the first case, it's the result of foo() which is cast to ExApp; in the second, it's the result of ExApp, and the overall expression is the return type of foo().
