Java (Math class and Random class), mathrandom

Java (Math class and Random class), mathrandom
I. Math Overview

Provides common mathematical calculation methods and two static constants E (base number of natural logarithm) and PI (circumference rate)

Ii. Common Methods

Package com. pb. demo1; public class MathTest {public static void main (String [] args) {System. out. println ("square root:" + Math. sqrt (9.0); System. out. println ("calculate the maximum value of two numbers:" + Math. max (10, 30); System. out. println ("minimum value of two numbers:" + Math. min (10, 30); System. out. println ("2's 3rd power:" + Math. pow (2, 3); System. out. println ("Rounding:" + Math. round (33.6 ));
System. out. println ("random number between 0 and 1:" + Math. random ());}}

3. Random is a Random number generation class. You can specify a Random number range and then generate any number in this range.

No.	Method	Type	Description
1	Public boolean nextBoolean ()	Normal	Generate a boolean value randomly
2	Public double nextDouble ()	Normal	Random double value generation
3	Public float nextFloat ()	Normal	Randomly generate float values
4	Public int nextInt ()	Normal	Generate int value randomly
5	Public int nextInt (int n)	Normal	Generate the int value of the given maximum value randomly
6	Public long nextLong ()	Normal	Generate a random long value

 

package com.pb.demo1;import java.util.Random;public class RandomTest {    public static void main(String[] args) {        Random random=new Random();        for (int i = 1; i <=10; i++) {            System.out.println(random.nextInt(i));                    }    }}