new java.util.BitSet and Synchronization

[Luis Reis]

  The Java Language Spec says that Object.hashCode will return different
values for different objects. However, you will have to use
System.identityHashCode.

  [If you really want to] Have a look at:
   
http://www.javasoft.com/products/jdk/1.1/docs/api/java.lang.Object.html,
   
http://www.javasoft.com/products/jdk/1.1/docs/api/java.lang.System.html,
    http://www.javasoft.com/docs/books/jls/clarify.html and/or
    http://java.sun.com/docs/books/jls/html/1.1Update.html

  Hope this helps.