public class A<T, U> implements S<T, U> {
private final T first;
private final U second;
public A(T first, U second) {
this.first = first;
this.second = second;
}
}
Is there anyway to call the public constructor from reflection?
What I'm trying to do is
classLoader.loadClass("A").getConstructor(<Something Here>).newInstance()
Is it possible for me to do this?
Since type parameters are erased, instead of passing in the fictional T.class and U.class (which doesn't mean anything), you should just pass in two Object.class, because that is what T and U erase to:
A.class.getConstructor(Object.class, Object.class)
You should also pass some parameters to newInstance. For example, to create a A<Integer, String>, you could do:
A<Integer, String> a =
(A<Integer , String>)A.class.getConstructor(Object.class, Object.class)
.newInstance(1, "Hello World");
The type parameters T and U are erased and become Object when the code is compiled. So use Object.class to indicate the constructor parameter types.
Constructor aConstructor = aClass.getConstructor(Object.class, Object.class);
getConstructor(Object.class, Object.class)