Question

How to generate a random double number between min and max in Java

Answer 1

public class GenerateRandomDoubleNumber_Java {
    public static double GenerateRandomDoubleNumberMinMax(double min, double max) {
        return Math.random() * (max - min + 1) + min; 
    }
    public static void main(String args[]) {
        double min = 70;
        double max = 100;
  
        double d = GenerateRandomDoubleNumberMinMax(min, max);
          
        System.out.println(d);
    }
}
  
  
  
/*
run:
  
85.60353458328242
  
*/

 

70+ SQL courses for beginners and professionals

Answer 2

import java.util.Random;

public class GenerateRandomDoubleNumber_Java {
    public static double GenerateRandomDoubleNumberMinMax(double  min, double max) {
        Random r = new Random();
        
        return r.nextDouble() * (max - min + 1) + min; 
    }
    public static void main(String args[]) {
        double  min = 70;
        double  max = 100;
 
        double d = GenerateRandomDoubleNumberMinMax(min, max);
         
        System.out.println(d);
    }
}
 
 
 
/*
run:
 
98.11906499490257
 
*/

 

70+ SQL courses for beginners and professionals