How to convert hex string to byte array in Scala?

By IncludeHelp Last updated : October 20, 2024

Hex String in Scala denotes value in hexadecimal number system i.e. base 16 number system.

Example:

hexString = "32AF1"

Byte Array is an array that stores elements of byte data type.

Converting Hex String to Byte Array

We can convert a hex string to a byte array in Scala using some method from java libraries which is valid as Scala uses the java libraries for most of its functions.

Step 1: Convert hexadecimal string to int
Step 2: Convert integer value to byte array using the toByteArray method for BigInteger values.

Scala Program for Converting Hex String to Byte Array

import scala.math.BigInt

object MyClass {
    def main(args: Array[String]) {
        val hexString = "080A4C";
        
        println("hexString : "+ hexString)
        
        val integerValue = Integer.parseInt(hexString, 16)
        val byteArray = BigInt(integerValue).toByteArray
        
        println("The byte Array for the given hexString is : ")
        for(i <- 0 to byteArray.length-1 )
            print(byteArray(i)+ " ")
    }
}

Output

hexString : 080A4C
The byte Array for the given hexString is : 
8 10 76

Description

In the above code, we have a hexadecimal string named hexString, and then convert it to integer value using parseInt() method of Integer class and stored the value to a variable named integerValue. We will convert this integer value to byteArray using the toByteArray method of BigInt class and store it to a variable named byteArray and printed the value using print() method.