23 lines
726 B
Java
23 lines
726 B
Java
// typeinfo/toys/GenericToyTest.java
|
|
// (c)2021 MindView LLC: see Copyright.txt
|
|
// We make no guarantees that this code is fit for any purpose.
|
|
// Visit http://OnJava8.com for more book information.
|
|
// Testing class Class
|
|
// {java typeinfo.toys.GenericToyTest}
|
|
package typeinfo.toys;
|
|
|
|
public class GenericToyTest {
|
|
public static void
|
|
main(String[] args) throws Exception {
|
|
Class<FancyToy> ftc = FancyToy.class;
|
|
// Produces exact type:
|
|
FancyToy fancyToy =
|
|
ftc.getConstructor().newInstance();
|
|
Class<? super FancyToy> up = ftc.getSuperclass();
|
|
// This won't compile:
|
|
// Class<Toy> up2 = ftc.getSuperclass();
|
|
// Only produces Object:
|
|
Object obj = up.getConstructor().newInstance();
|
|
}
|
|
}
|