Attached test code are used to check skippedEntity() in org.xml.sax.ContentHandler interface.

As description from http://docs.oracle.com/javase/7/docs/api, skippedEntity() callback will be triggered when below 2 SAX features are set as FALSE:
http://xml.org/sax/features/external-general-entities
http://xml.org/sax/features/external-parameter-entities

But actually it does not work during external .dtd parsing, below is log:
=====================
startDocument() is invoked
customVersion
customEncoding
startDTD() is invoked
elementDecl() is invoked for element : toys
elementDecl() is invoked for element : toy
attributeDecl() is invoked for attr :id
internalEntityDecl() is invoked for entity : name1
internalEntityDecl() is invoked for entity : name2
elementDecl() is invoked for element : name
elementDecl() is invoked for element : price
endDTD() is invoked

   Document : toys.xml
   Created on : August 21, 2012
   Author : Patrick Zhang
   Description: Sample test file for org.xml.sax.ext.DefaultHandler2

startPrefixMapping() is invoked for ns1 : http://ns1.java.com
startCDATA() is invoked
endCDATA() is invoked

toy id=1
      name : toy1's name price : 98470
toy id=2
      name : toy2's name price : 345
endPrefixMapping() is invoked for ns1

endDocument() is invoked
===================

There are several problems in above log:
1. entities included in external dtd, here we mean "&name1;" and "&name2;", still can be recognized during paring. It does not work as expected. It should be ignored according to definition of the 2 features.
2. Actually when we set below feature as FALSE, the entities are ignored really. But we do not see skippedEitity() are triggered:
http://apache.org/xml/features/nonvalidating/load-external-dtd