How should I cast for Java generic with multiple bounds?

Question

Is it possible to cast an object in Java to a combined generic type?

I have a method like:

public static  void doSomet         


        

Answer 1

It is possible to "up-cast" to a union type, by the horrible means of encoding the union type into a method's type parameter; for your example you can write

private  Q upcast(final Object in) {
    return (Q) in;
}

// ... elsewhere...

if (myObject instanceof Foo && myObject instanceof Bar) {
    doSomething(upcast(myObject));
}