Rounding bigdecimal to always have two decimal places

Question

Below is my code implementation to round BigDecimal values to two decimal places: 

BigDecimal rounded = value.round(new MathContext(2, RoundingMode.CEILING));

logger.trace("rounded {} to {}", value, rounded);

This is the respective output: 

rounded 0.819 to 0.82

rounded 1.092 to 1.1

rounded 1.365 to 1.4 // should be 1.37

rounded 2.730 to 2.8 // should be 2.74

rounded 0.819 to 0.82

The problem is it doesn’t round all the values. Can anyone tell me how to do this with BigDecimal or with another class/library? 

Answer 1

You can use RoundingMode to round the decimal value. 

my_value = my_value.setScale(2, RoundingMode.CEILING) 

If you want to learn more about Java, then go through this Java tutorial by Intellipaat for more insights.  

Answer 2

To round a BigDecimal in Java to always have two decimal places, you use the setScale method with RoundingMode. This way you will ensure that the result will have exactly two decimal places, rounding if needed. 

Example Code 

import java.math.BigDecimal; 

import java.math.RoundingMode; 

 

public class Main { 

    public static void main(String[] args) { 

        BigDecimal number = new BigDecimal("123.456"); 

BigDecimal rounded = number.setScale(2, RoundingMode.HALF_UP); // Rounds to two decimal places 

        System.out.println(rounded); // Output: 123.46 

    } 

} 

Explanation 

setScale(2, RoundingMode.HALF_UP) rounds BigDecimal to two decimal places. 

RoundingMode.HALF_UP rounds up if the third decimal is 5 or higher. 

This method guarantees two-decimal formatting.