The Java "Random" class lets you generate a random number for your Java apps. You use this number generator to randomize images shown in your apps. You load the images into an array, randomly ...

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.

For that you’ll need a true random number generator (RNG), and this open-source hardware RNG uses one of the better methods we’ve seen.