I need to write a tree class in Java where each level has a unique object type. The way it is written below does not take advantage of generics and causes alot of duplicate code. Is there a way to write this with Generics ?

 public class NodeB {
   private String nodeValue;
   //private List<NodeB> childNodes;
   // constructors
   // getters/setters
}

public class NodeA {
   private String value;
   private List<NodeB> childNodes;
   // constructors
   // getters/setters
}

public class Tree {
   private String value;
   private List<NodeA> childNodes;
   // constructors
   // tree methods
}