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.
The short answer to your question is no, you cant really use Java as a client side scripting language. You can, however, use applets to achieve the same effect (more or less), and you can embed java in HTML for server side processing (in JSP).