Consider this code: public class DummyClass { public List<? extends Number> dummyMethod() { return new ArrayList<Integer>();
I know there\'s all sorts of counter-intuitive properties of Java\'s generic types. Here\'s one in particular that I don\'t understand, and which I\'m hoping someone can explain to me. When specifying
Having the below code: Stack<Integer> integers = new Stack<Integer>(); Stack<? extends Number> numbers = integers;
I have a wrapper class for ConcurrentMap like the following: public MapWrapper<K, V> implements ConcurrentMap<K, V> {
Please help me with this: If Lion IS-A Animal and given Cage<T>: Cage<? extends Animal> c = new Cage<Lion>(); // ok,
This is NOT homework. Part 1 Is it possible to write a generic method, something like this: <T extends Number> T plusOne(T num) {
Is there anyway to use a bounded wildcard require a class implement more than one interface? In otherwords, something like...
This following is from generics tutorials: Say class R extends S, public void addR(List<? extends S> s) {
Is there a difference between <N extends Number> Col开发者_Python百科lection<N> getThatCollection(Class<N> type)
Can someone explain to me why the following code does not work? public class Test { interface Strategy<T> {
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