OnJava8-Examples/generics/NotSelfBounded.java at master · CSapprenticeWT/OnJava8-Examples · GitHub

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// generics/NotSelfBounded.java

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com 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> {}