How do i place JCE in Java?

Hello to all :)
I have to make a symmetric algorithm in Java and i need to have these three stuff in it
1) Sun Java Cryptography Extension (JCE)
2) JCE Unlimited Strength Jurisdiction Policy
3) Bouncycastle Provider
cause i need the packages
javax.crypto.*
java.security.*
what shall i download from the internet in order to have them and how do i place them in my region?
Thanks, in advance!

Thanks for replying!
Well i haven't downloaded anything from the internet.
I have a region(login session -unix) in my university where the Java is already in, but the JCE is not included in it cause when i tried to make a simple problem using import javax.crypto.* and java.security.* i had some warnings saying that these are not used referring to these two imports, so maybe JCE is not in.
So, where shall i download this JCE and how shall i place it in my region and in which folder?
I'm sorry for my questions but i'm new at Java and i don't know how to fix the system for running my exercises :)

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