How to set double fraction Precision

How to set double fraction Precision in Java?

i was doing something in my program and i found myself that i need to approximate a fraction to half upper, i googled and i didn't find a fine answer, but after some tries i figured it out by myself, its something easy all you have to do is

Code:


import java.math.BigDecimal;

public class Main {

    public static void main(String[] args) {
        double  num = 0.07568;
       1-  BigDecimal b = new BigDecimal(num).setScale(2,BigDecimal.ROUND_HALF_UP);
       2-  num=b.doubleValue();
         System.out.println("Value is : "+ num);
        
    }

}

 

in line 1- we created an object from BigDecimal that takes a double number and with the setScale function you can scale it to any approximation you want, and here we approximated it until 3 values after the dot, and we choose to round it to the upper half, you have the ability to round it to different ranges according to your needs .

in line 2- we converted it to double and output it.