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This article mainly explains "how Java generates random numbers". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn how to generate random numbers in Java.

Generate random numbers of integers

Using the nextInt () method of the Random class, you can generate an int type random number that ranges over the entire range of int values.

The nextInt () method can pass in a parameter of type int, and the range of random numbers generated in the case of passing parameters is from 0 to that parameter.

Generate floating-point random numbers

Using the nextFloat () / nextDouble () method of the Random class, you can generate a floating-point random number in the range of 0 to 1.0 (the two methods produce random numbers with different precision).

Other methods of Random

Using the nextGaussian () method of the Random class, you can generate a pseudo-Gaussian distribution with a mean of 0. 0 and a standard deviation of 1. 0 from the random number generator's sequence of double values.

Import java.util.Random;public class RandomNumbers {public static void main (String [] args) {int num1 = new Random (). NextInt (); / / use Random's nextInt method to generate int type random numbers in the range of System.out.println (num1) of the entire int; int num2=new Random () .nextInt (10) / use Random's nextInt method to generate random numbers of type int, ranging from 0 to the value range of input parameters System.out.println (num2); num2 = new Random (). NextInt (10) + 10 new Random / modify the generation range of the final generated random number float num3 = new Random (). NextFloat () / use Random's nextFloat method to generate float type random numbers, floating-point random numbers in the range 0d to 1.0 System.out.println (num3); double num4 = new Random () .nextDouble (); / / use Random's nextDouble method to generate double type random numbers, floating-point random numbers System.out.println (num4) in the range 0d to 1.0 Double num5 = new Random (). NextGaussian (); / / generates a pseudo-Gaussian distribution with a mean value of 0.0 and a standard deviation of 1.0 from the sequence of the random number generator. System.out.println (num5);}}

More skills

You can expand the range of narrowing or moving the range by adding, subtracting, multiplying and dividing.

By adding 10 after the generated random number, you can add 10 to all generated random numbers, thus moving the interval range generated by the random number to the right.

After the generated random number * 10, all the generated random numbers can be expanded by 10 times, thus expanding the range of random numbers generated by 10 times.

Thank you for your reading, the above is the content of "how to generate random numbers in Java". After the study of this article, I believe you have a deeper understanding of how Java generates random numbers, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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