Java In A Nutshell, 5th Edition

A Comment node represents a comment in an XML document. The content of the comment (i.e. the text between <!-- and --> ) is available with the getdata( ) method inherited from CharacterData , or through the getNodeValue( ) method inherited from Node . This content may be manipulated using the various methods inherited from CharacterData

public interface Comment extends CharacterData { }

Returned By

Document.createComment( )