Java: How should look an instanceof method
Imagine, I want to write a useless method called: isInstanceof
that returns a boolean
.
instanceof
has to be used like:
[object] instanceof [a classname]
// I was thinking about something like this
public static boolean isInstanceof(Object obj, /*magic for the second param*/)
{
return obj instanceof /*the magical second param*/
}
But how can I make an parameter for [a classname]
? Is there a way to do this without the method isInstance(Class cls)
from java.lang开发者_C百科.Class
?
Thanks
Hehe, yes. Use isAssignableFrom(Class) from Class
. Not only is it not isInstance(Class)
, it also matches the way the instanceof
operator works more closely. :)
Other than that, no, there’s not much you can do without those methods from Class
.
A dynamic version of
[object] instanceof [a classname]
would be:
Class.forName("a classname").isAssignableFrom(object.getClass());
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