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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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