Cryptographically secure pseudo-random number generator (CSPRNG) in Java

I'm looking for a CSPRNG algorithm, I would love to see a Java implementation but if it's not too complicated and I can "translate it" myself in Java it would already be great to see it in another language. I do not care how fast is-it but I want to be able to initialize it (ie by generating a list of x random numbers with another computer at another time I get the same suite if I initialized the generator with the same number).

Thomas!