How to Assign Random Numbers to an Array in Java. Java has a "Random" class that lets you generate a random number you use to implement calculations in your Java source code.

But who certifies the random numbers, and what can we do with them afterward? When you ask a computer to give you a random number, code behind the scenes is doing an approximation of randomness.

The more random the numbers, the harder the encrypted message is to crack. Both the beauty and pitfalls of computing come down to the machines' exacting nature in "random" number generation.