Scroll down uninstall you find Java, click on it, and click Uninstall:
If you aren’t sure what needs to be done, do the following: Removing Java from your Windows PC is as easy as uninstalling it from Add or Remove Programs.
How To Uninstall Java on Windows XP, Vista, Windows 7, and Windows 8 Note: If you are looking to disable Java just from your browser, and not completely uninstall it from your computer, read dotTech’s guide on how to disable Java for Firefox, Chrome, Internet Explorer, and Opera. The following instructions should work for all versions of Windows but is specifically confirmed to work with Windows XP and higher machines. If you are fed up with Java’s security vulnerabilities and want to finally get rid of it, this guide shows you how to uninstall/disable/remove Java on Windows.