java random?

Answer 1

It is not a clear question.. what did you mean?? So what i got from your question is; how to generate random numbers??.. so it is so easy just make an object of Random class as following
Random name_of_object = new Random();
and name_of_object.Next(....)

thats all :)

also check here to get some more..
http://www.getindirectory.com/getin.aspx?pr=Computers/Programming/Languages/

Answer 2

I don't know what you are asking but here is the documentation.
Math.random()

Returns a double value with a positive sign, greater than or equal to 0.0 and less than 1.0.