30 lines
728 B
Java
30 lines
728 B
Java
//: generics/ClassTypeCapture.java
|
|
|
|
class Building {}
|
|
class House extends Building {}
|
|
|
|
public class ClassTypeCapture<T> {
|
|
Class<T> kind;
|
|
public ClassTypeCapture(Class<T> kind) {
|
|
this.kind = kind;
|
|
}
|
|
public boolean f(Object arg) {
|
|
return kind.isInstance(arg);
|
|
}
|
|
public static void main(String[] args) {
|
|
ClassTypeCapture<Building> ctt1 =
|
|
new ClassTypeCapture<Building>(Building.class);
|
|
System.out.println(ctt1.f(new Building()));
|
|
System.out.println(ctt1.f(new House()));
|
|
ClassTypeCapture<House> ctt2 =
|
|
new ClassTypeCapture<House>(House.class);
|
|
System.out.println(ctt2.f(new Building()));
|
|
System.out.println(ctt2.f(new House()));
|
|
}
|
|
} /* Output:
|
|
true
|
|
true
|
|
false
|
|
true
|
|
*///:~
|