Hi,
> Infact i want to impliment some thing like windows
> authuntication!!!
Wow, I think implementing windows auth would be really hard in java. However you could use JAAS - this will allow you to create your own login module (which uses for example LDAP).
Here are some resources:
http://developers.sun.com/jscreator/reference/techart/2/jaas_authentication.htm l
http://weblogs.java.net/blog/edburns/archive/2006/03/repost_using_ja.html
best regards
Grzegorz