http://www.allapplabs.com/interview_questions/java_interview_questions.htm

http://www.geekinterview.com/question_details/548

http://www.velocityreviews.com/forums/t130877-difference-between-hashmap-and-hashtable.html

http://www.javafaq.nu/java-article281.html

http://forum.java.sun.com/thread.jspa?threadID=588768

http://www.hotscripts.com/Detailed/70334.html

http://www.allinterview.com/showanswers/20263.html

http://www.qaput.com/difference-between-hashmap-and-hashtable/


AND THAT'S ONLY PAGE ONE OF GOOGLE

http://www.jguru.com/forums/view.jsp?EID=1263784