BigDecimal creation

In this chapter you will learn:

How to create Java BigDecimal
How to create BigDecimal from MathContext

Create BigDecimals

BigDecimal(double val) converts a double into a BigDecimal.

import java.math.BigDecimal;
 /* j a v a2s.co  m*/

public class Main {
 
    public static void main(String[] args) {
        System.out.println(new BigDecimal(1f));
        System.out.println(new BigDecimal(2f));
        
    }
}

The output:

Create BigDecimal from MathContext

BigDecimal(BigInteger unscaledVal, int scale, MathContext mc) converts a BigInteger and an int scale into a BigDecimal, with rounding according to the context settings.

import java.math.BigDecimal;
import java.math.MathContext;
 //  ja v  a 2  s.  co  m

public class Main {
 
    public static void main(String[] args) {
        BigDecimal first = new BigDecimal(1f);
        BigDecimal second = new BigDecimal(1000f);
 
 
        BigDecimal result1 = new BigDecimal(first.doubleValue() / second.doubleValue());
        BigDecimal result2 = first.divide(second, MathContext.DECIMAL128);
 
        System.out.println(result1);
        System.out.println(result2);
        System.out.println((first.doubleValue() / second.doubleValue()));
 
    }
}