This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
I have a problem with an application that the user may click twice on the submit button and the request goes to the back-end twice. I would like to prevent it by disabling the Submit button after the first click.