BigDecimal divide with scale

Question

I have

private static final BigDecimal ONE_HUNDRED = new BigDecimal(100); private static final BigDecimal TEN = new BigDecimal(10);

BigDecimal decimal = new BigDecimal(1050); I need to get 10% I write BigDecimal decimalResult = decimal.divide(ONE_HUNDRED).multiply(TEN)//100, 10

But Intellij IDE says:

'BigDecimal.divide()' called without a rounding mode argument more...

I added BigDecimal.ROUND_HALF_UP and all others but I get wrong result. I need 1050/100 = 10.5 but if I add BigDecimal.ROUND_HALF_UP result = 11.

How can I correctly divide with scale parameters?

maybe you should read: stackoverflow.com/questions/35435691/… — user180100
– user180100, Commented Apr 3, 2017 at 11:19
TEN and ONE_HUNDRED does not exists as constants in BigDecimal — freedev
– freedev, Commented Apr 3, 2017 at 11:31
I faund solution. BigDecimal recovery = amount.divide(ONE_HUNDRED, 2, BigDecimal.ROUND_HALF_UP) But @ freedev - Why TEN and ONE_HUNDRED does not exists as constants in BigDecimal? I created constans myself — user5620472
– user5620472, Commented Apr 3, 2017 at 11:46

panqingcui · Accepted Answer · 2019-07-11 07:39:28Z

16

public static double divide(double d1, double d2) { BigDecimal b1 = new BigDecimal(d1); BigDecimal b2 = new BigDecimal(d2); return b1.divide(b2, 2, RoundingMode.DOWN).doubleValue(); }

answered Jul 11, 2019 at 7:39

panqingcui

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1 Comment

Esteban May 15 at 16:34

Alternative rounding modes: docs.oracle.com/javase/8/docs/api/java/math/RoundingMode.html

freedev · Accepted Answer · 2017-04-03 11:39:10Z

3

This example returns 105.0000

public class TestBigDecimal { static BigDecimal decimal = new BigDecimal(1050).setScale(4, BigDecimal.ROUND_HALF_UP); static BigDecimal ONE_HUNDRED = new BigDecimal(100); static BigDecimal TEN = new BigDecimal(10); public static void main(String[] args) { BigDecimal decimalResult = decimal.divide(ONE_HUNDRED).multiply(TEN) ; System.out.println(decimalResult); } }

You should adjust the scale during the creation of decimal variable.

edited Apr 3, 2017 at 11:39

answered Apr 3, 2017 at 11:21

freedev

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4 Comments

user180100 Over a year ago

Intellij IDE is still saying: "'BigDecimal.divide()' called without a rounding mode argument more..." I don't think your answer answers the question

RealSkeptic Over a year ago

You know, TEN already exists as a constant in the BigDecimal class.

freedev Over a year ago

@RC right, I think this answer should fit the problem.

Rudy Velthuis Over a year ago

What exactly does IntelliJ say? what is the text after the more...part? Because you can use divide() without a rounding mode, and it is entirely safe if you use ONE_HUNDRED as argument.

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