Kotlin .encodeToHexString()

In Kotlin, the .encodeToHexString() method is a part of the kotlinx.serialization library and is used to encode the given data to a hexadecimal string. In this operation, it first serializes and converts the given data to a byte array, then delegates it to BinaryFormat and finally encodes the resultant bytes to a hexadecimal string.

Syntax

fun <T> BinaryFormat.encodeToHexString(value: T): String

• <T>: The data type to be encoded.
• BinaryFormat: The interface to which the byte array is to be delegated.
• value: The data to be encoded.
• String: The data type to be returned.

Example

In the following example, the .encodeToHexString() method encodes the Codecademy string to a hexadecimal string:

import kotlinx.serialization.*
import kotlinx.serialization.protobuf.ProtoBuf

@Serializable
data class Institution(val name: String)

fun main() {
  val institution = Institution("Codecademy")
  val institutionToHexString = ProtoBuf.encodeToHexString(institution)

  println("Codecademy in Hex String: $institutionToHexString")
}

Copy to clipboard
Copy to clipboard

The output for the above code is as follows:

Codecademy in Hex String: 0a0a436f6465636164656d79

Copy to clipboard
Copy to clipboard