Clever Geek Handbook

Getting rid of the uncontrolled actor in reflection

I am loading a class using classloader which returns me Class<?>

and now I want to pass the class to another method or function that takes Class<? extends SomeClass>

.

Now when I try to do:

Class<?> clazzFromClassLoader = Class.forName(nameOfClass);
Class<? extends Someclass> clazz = (Class<? extends SomeClass>)clazzFromClassLoader;
//second line gives unchecked cast warning

I can make sure there is no class exception thrown by using

SomeClass.isAssignableFrom(clazzFromClassLoader);

But is there a way to get rid of the unverified actor?

+3


source to share


1 answer


Yes: you can write:

Class<? extends Someclass> clazz =
    clazzFromClassLoader.asSubclass(Someclass.class);


(See the asSubclass

Javadoc for details .)

+8


source






More articles:


All Articles