I have a subclass that needs to return a subclass of the return type of its parent class.I believe this is called a covariant return type.I am wondering the simplest way to convert from the parent to
I have the following structure: public interface BarReturn {} public interface FooReturn {} public interface FooBarReturn extends FooReturn, BarReturn {}
I\'m trying to understand this but I didn\'t get any appropriate results from searching. In C# 4, I can do
The following Scala class: class Foo[+T <: Bar] extends FooBase ... effectively defines a type hierarchy which has Foo[Bar] as its root - i.e. any valid Foo[X] will be assignable to a Foo[Bar] v
Why does below code prints \"1\" ? class A { int x = 1; } class B extends A { int x = 2; } class Base { A getObject() {
I want to override a method and replace a parameter it takes with a subclass of that parameter. For return type there is no problem, because they are not a part of method signature and can be replace
I spent quite a while with Google to find some information on this topic, but results relating to both Java enums and covariant return types were pretty much non-existent.
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