Question

I have an object called Node<Value>. Objects NodeInternal<Value> and NodeLeaf<Value> inherit from Node<Value>.

I am trying to test what is the type of the object using instanceof as follows:

if (node instanceof NodeInternal). I did not add <Value> because upon runtime, the type is dropped. Without <Value> on NodeInternal however, I get the following warning: NodeInternal is a raw type. References to generic type NodeInternal<Value> should be parameterized.

What should I do in this case?

Answer 1

Use an unbounded wildcard:

if (node instanceof NodeInternal<?>) 
  node = ((NodeInternal<Value>) node).SE();