Checking generics runtime for instanceof instance

Question

I have an object named Node<Value> . NodeInternal<Value> and NodeLeaf<Value> objects inherit from Node<Value> .

I am trying to check what type of object is used with instanceof as follows:

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

What should I do in this case?

Answer 1

Use unlimited template:

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

Answer 2

http://www.java2s.com/Code/Java/Language-Basics/Usetheinstanceofoperatorwithagenericclasshierarchy.htm

Use <?> .

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Java: instanceof Generic