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.
Thanks a lot for the message.
The problem was that the tabPanel goes outside of the page , in width because text in written in tab headers was too long, but now we reduce that text and tabPanel came at a reasonable width.