Java BigDecimal byteValueExact() Method with Example

BigDecimal Class byteValueExact() method: Here, we are going to learn about the byteValueExact() method of BigDecimal Class with its syntax and example.
Submitted by Preeti Jain, on May 03, 2020

BigDecimal Class byteValueExact() method

  • byteValueExact() method is available in java.math package.
  • byteValueExact() method is used to convert a BigDecimal to exact byte value and when this BigDecimal value is above range then an exception will be thrown.
  • byteValueExact() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
  • byteValueExact() method may throw an exception at the time of converting BigDecimal to a byte.
    ArithmeticException: This exception may throw when this BigDecimal is not in a range of byte or any fractional part exists in this BigDecimal.


    public byte byteValueExact();


  • It does not accept any parameter.

Return value:

The return type of this method is byte, it returns the byte representation of this BigDecimal.


// Java program to demonstrate the example 
// of byte byteValueExact() 
// method of BigDecimal

import java.math.*;

public class ByteValueExactOfBD {
    public static void main(String args[]) {
        // Initialize two variables of int and 
        // String type
        int val = 125;
        String str = "100";

        // Initialize two BigDecimal objects  
        BigDecimal b_dec1 = new BigDecimal(val);
        BigDecimal b_dec2 = new BigDecimal(str);

        // By using byteValueExact() method is to 
        // convert this BigDecimal (b_dec1) into
        // a byte variable named b_conv
        byte b_conv = b_dec1.byteValueExact();
        System.out.println("b_dec1.byteValueExact(): " + b_conv);

        // By using byteValueExact() method is to 
        // convert this BigDecimal (b_dec2) into
        // a byte variable named b_conv
        b_conv = b_dec2.byteValueExact();
        System.out.println("b_dec2.byteValueExact(): " + b_conv);


b_dec1.byteValueExact(): 125
b_dec2.byteValueExact(): 100

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