I don't have any base or idea about java. Still I'm very interested in learning it. Is there any good websites/tutorials available which will be helpful for a beginner?
Java and javascript are two completely different languages. Javascript is a client side scripting language, Java is a computer programming language. Which are you looking to learn?
For Java, you can go to http://www.java2s.com/Tutorial/Java/CatalogJava.htm OR http://www.freejavaguide.com/corejava.htm. Both are great.
You'll compile and run your own Java application, using Sun's JDK. It's quite easy to learn java programming skills, and in these parts, you'll learn how to write, compile, and run Java applications. Before you can develop corejava applications, you'll need to download the Java Development Kit (JDK). Log on to freejavaguide.com/java_comments.htm