**Contents**show

## What is BigDecimal scale?

A BigDecimal consists of **an arbitrary precision integer unscaled value and a 32-bit integer scale**. If zero or positive, the scale is the number of digits to the right of the decimal point. If negative, the unscaled value of the number is multiplied by ten to the power of the negation of the scale.

## What is BigDecimal in Java?

A BigDecimal consists of **an arbitrary precision integer unscaled value and a 32-bit integer scale**. If zero or positive, the scale is the number of digits to the right of the decimal point. If negative, the unscaled value of the number is multiplied by ten to the power of the negation of the scale.

## How is BigDecimal calculated?

BigDecimal subTotal, taxRate, tax, total; subTotal = new BigDecimal(“32.50”); taxRate = new BigDecimal(“0.05”); tax = subTotal. multiply(taxRate); total = subTotal. add(tax);

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How to Do BigDecimal Arithmetic for Java.

Method | Explanation |
---|---|

BigDecimal multiply(BigDecimal val) | Multiplies this BigDecimal by the specified BigDecimal and returns the result. |

## Can you add BigDecimal in Java?

math. BigDecimal. add(BigDecimal val) is **used to calculate the Arithmetic sum of two BigDecimals**. This method is used to find arithmetic addition of large numbers of range much greater than the range of largest data type double of Java without compromising with the precision of the result.

## How do I know if BigDecimal is zero?

How to check if BigDecimal variable == 0 in java? **new BigDecimal**( “0” ). equals( BigDecimal. ZERO) // true new BigDecimal( “0.00” ).

## How do you scale BigDecimal?

**The java.** **math.** **BigDecimal.** **scale() is an inbuilt method in java that returns the scale of this BigDecimal.**

- For zero or positive value, the scale is the number of digits to the right of the decimal point.
- For negative value, the unscaled value of the number is multiplied by ten to the power of the negation of the scale.

## Why use BigDecimal instead of double in Java?

A BigDecimal is an exact way of representing numbers. A Double has a certain precision. Working with doubles of various magnitudes (say d1=1000.0 and d2=0.001 ) could result in the 0.001 being dropped alltogether when summing as **the difference in magnitude is so large**. With BigDecimal this would not happen.

## How do I convert BigInteger to BigDecimal?

**Convert BigInteger to BigDecimal in Java**

- Using BigDecimal’s class constructor [Recommended] You can easily convert BigInteger to BigDecimal using BigDecimal’s class constructor. Syntax: new BigDecimal(BigInteger val) …
- Using another BigDecimal’s class constructor. Syntax: new BigDecimal(BigInteger unscaledVal, int scale);

## How do you round BigDecimal to 2 decimal places?

Using BigDecimal

You can convert double or float to BigDecimal and use **setScale() method** to round double/float to 2 decimal places.

## Can BigDecimal be null?

**You either never allow null values in database**, application or view and initialize everything with new BigDecimal(0) or perform null checks on every usage for nullable values.

## How do I check if BigDecimal is integer?

Depending on the source/usage of your BigDecimal values it might be faster to check **if the scale <= 0 first**. If it is, then it’s definitely an integer value in the mathematical sense. If it is >0, then it could still be an integer value and the more expensive test would be needed.

## How do I convert BigDecimal to BigInteger?

**Java BigDecimal to BigInteger**

- import java. math. BigDecimal;
- import java. math. BigInteger;
- public class BigDecimalToBigIntegerMain {
- public static void main(String[] args) {
- BigDecimal bd= new BigDecimal(“10.9”);
- BigInteger bi=bd. toBigInteger();
- System. out. println(“BigInteger bi: “+bi. toString());
- }