How to get type parameter values using java reflection?

Question

interface Foo { ... }
class Bar implements Foo { ... }

I\'ve got a Bar object. How to get the value of T

Answer 1

If you already have Guava on the classpath, this is a bit more robust as you specify the interface/superclass by type rather than index.

TypeToken baz = TypeToken.of(Bar.class).resolveType(Foo.class.getTypeParameters()[0]);
System.out.println(baz.getRawType()); // class Baz