What is the use of Random and Math.random ()
This article is about the usefulness of Random and Math.random (). The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.
1.Random as a class, nextInt is its method, and you can limit the range of random numbers generated by setting the parameters of the nextInt method, for example:
System.out.println (random.nextInt)
This produces a random integer greater than 0 and less than 100.
2.Math.random () is a method that produces a random floating-point number between 0 and 1. Through arithmetic, you can produce a number in a specific range.
3. From the source point of view, the Math.random () method actually calls the nextDouble method of the Random class, which happens to generate a random floating-point number between 0 and 1.
Public static double random () {
Return RandomNumberGeneratorHolder.randomNumberGenerator.nextDouble ()
}
Private static final class RandomNumberGeneratorHolder {
Static final Random randomNumberGenerator = new Random ()
}
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