OnJava8-Examples/generics/NotSelfBounded.java
2015-11-15 15:51:35 -08:00

25 lines
604 B
Java

// generics/NotSelfBounded.java
// ©2016 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
public class NotSelfBounded<T> {
T element;
NotSelfBounded<T> set(T arg) {
element = arg;
return this;
}
T get() { return element; }
}
class A2 extends NotSelfBounded<A2> {}
class B2 extends NotSelfBounded<A2> {}
class C2 extends NotSelfBounded<C2> {
C2 setAndGet(C2 arg) { set(arg); return get(); }
}
class D2 {}
// Now this is OK:
class E2 extends NotSelfBounded<D2> {}