I noticed the additional annotations useful for indicating thread safety. There are some other interesting annotations (perhaps more practical) that work in conjunction with the Findbugs static analysis tool, ensuring that methods return a non-null value, a value that should be checked, etc. http://findbugs.sourceforge.net/manual/annotations.html Also see JSR-305 ( http://jcp.org/en/jsr/detail?id=305 ) ____________________________________________________________________________________ Get your own web address. Have a HUGE year through Yahoo! Small Business. http://smallbusiness.yahoo.com/domains/?p=BESTDEAL