This week's book giveaway is in the OCAJP forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide 1Z0-808 and have Jeanne Boyarsky & Scott Selikoff on-line! See this thread for details.
Hi guys, Im creating a website in which only one user say X can login at a time. No 2 persons bearing username X can login at same time.How can I do this.Can I get the list of all users from a ServletContext and find if there is any duplication. bye nitin