what libraries do i need to run this keygenerator class

Which libraries do I need to import for this class?

KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(128);

If you would prefer not to give me the answer that I seek, t开发者_JAVA技巧hen please tell me how can I find out about these libraries. By the way, I use Eclipse.

First google result for KeyGenerator.getInstance("AES")

You don't say where you got it from, etc., but Eclipse gives you hints based on what it can determine from your code and what code is it's libraries.

IIRC: Where you see the yellow exclamation double clicking that will give you a list based on what it thinks you meant (I find that it is right about 90% of the time) or (AFM) press F1 when the caret is on that line.