This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
That depends on what you mean by "use Applets in jsp". Applets are not part of JSPs, but they can be part of the HTML page that's generated by a JSP. If that's what you mean, simply generate an applet tag and it should work fine. See this for more details about the tag.