No JavaScript and Java are two different things. My understanding is that JavaScript is analogous to html as Java is to C++. The only thing the two really have in common is the word Java.
http://www.htmlgoodies.com/beyond/javascript/article.php/3470971/Java-vs-JavaScript.htm

To uninstall Java, simply go to your Control Panel in Windows, Uninstall Programs and select Java. Like I mentioned before, unless you have the Java Development Kit install (are you a software developer?) then you won't have a problem with this flaw at all.

I took a beginning course in Java a number of years ago when it first came out and I soon realized programming is just not my thing. I have Java installed for software like SkillSoft e-learning and a couple of other things.