How to convert a ByteArray to a ShortArray in Kotlin?

How to convert a ByteArray to a ShortArray in Kotlin?

To convert a ByteArray to a ShortArray in Kotlin, you can use the map function along with the toShort() method to handle the conversion of each byte to a short. Here's a simple example of how to do this:

Example Code

fun main() { val byteArray: ByteArray = byteArrayOf(1, 2, 3, 4, 5) // Convert ByteArray to ShortArray val shortArray: ShortArray = byteArray.map { it.toShort() }.toShortArray() // Print the ShortArray println(shortArray.joinToString(", ")) }

Explanation

  1. Input ByteArray: We define a ByteArray containing some sample values.

  2. Conversion:

    • We use the map function to iterate over each element in the ByteArray.
    • The toShort() method converts each Byte to a Short.
    • Finally, we call toShortArray() to convert the resulting list into a ShortArray.

  3. Output: The joinToString function is used to print the contents of the ShortArray.

Note

If you want to convert the ByteArray directly without intermediate lists, you can use a more manual approach with a loop:

fun main() { val byteArray: ByteArray = byteArrayOf(1, 2, 3, 4, 5) // Create a ShortArray with the same size as the ByteArray val shortArray = ShortArray(byteArray.size) // Fill the ShortArray with values from ByteArray for (i in byteArray.indices) { shortArray[i] = byteArray[i].toShort() } // Print the ShortArray println(shortArray.joinToString(", ")) }

This version is slightly more efficient as it avoids creating an intermediate list.

Examples

  1. Kotlin convert ByteArray to ShortArray

    • Description: Convert a ByteArray to a ShortArray in Kotlin using ByteBuffer.
    • Code:
      fun byteArrayToShortArray(byteArray: ByteArray): ShortArray { val buffer = ByteBuffer.wrap(byteArray) val shortArray = ShortArray(byteArray.size / 2) buffer.asShortBuffer().get(shortArray) return shortArray }

    Explanation: This function uses ByteBuffer to wrap the ByteArray and extract ShortArray by interpreting bytes as shorts.

  2. Kotlin ByteArray to ShortArray conversion example

    • Description: Example of converting ByteArray to ShortArray in Kotlin.
    • Code:
      fun main() { val byteArray = byteArrayOf(0, 1, 0, 2, 0, 3) // Example ByteArray val shortArray = ShortArray(byteArray.size / 2) { (byteArray[it * 2].toInt() shl 8 or (byteArray[it * 2 + 1].toInt() and 0xFF)).toShort() } println("Converted ShortArray: ${shortArray.joinToString()}") }

    Explanation: This example directly converts each pair of bytes in the ByteArray to shorts in the ShortArray.

  3. Kotlin convert ByteArray to ShortArray using manual conversion

    • Description: Manually convert a ByteArray to a ShortArray in Kotlin.
    • Code:
      fun byteArrayToShortArray(byteArray: ByteArray): ShortArray { val shortArray = ShortArray(byteArray.size / 2) for (i in shortArray.indices) { val upper = byteArray[i * 2].toInt() and 0xFF val lower = byteArray[i * 2 + 1].toInt() and 0xFF shortArray[i] = (upper shl 8 or lower).toShort() } return shortArray }

    Explanation: This function manually converts each pair of bytes in the ByteArray to shorts in the ShortArray using bit manipulation.

  4. Kotlin ByteBuffer convert ByteArray to ShortArray

    • Description: Using ByteBuffer to convert ByteArray to ShortArray in Kotlin.
    • Code:
      fun byteArrayToShortArray(byteArray: ByteArray): ShortArray { val buffer = ByteBuffer.wrap(byteArray) val shortArray = ShortArray(byteArray.size / 2) buffer.asShortBuffer().get(shortArray) return shortArray }

    Explanation: This approach utilizes ByteBuffer to wrap the ByteArray and extract a ShortArray.

  5. Kotlin convert byte array to short array with ByteBuffer

    • Description: Convert a ByteArray to a ShortArray using ByteBuffer in Kotlin.
    • Code:
      fun byteArrayToShortArray(byteArray: ByteArray): ShortArray { val buffer = ByteBuffer.wrap(byteArray) val shortArray = ShortArray(byteArray.size / 2) buffer.order(ByteOrder.LITTLE_ENDIAN) // Optional: Set byte order if needed buffer.asShortBuffer().get(shortArray) return shortArray }

    Explanation: This function demonstrates converting ByteArray to ShortArray using ByteBuffer with optional byte order settings.

  6. Kotlin ByteArray to ShortArray conversion using extension function

    • Description: Implementing an extension function to convert ByteArray to ShortArray in Kotlin.
    • Code:
      fun ByteArray.toShortArray(): ShortArray { val shortArray = ShortArray(size / 2) for (i in shortArray.indices) { val upper = this[i * 2].toInt() and 0xFF val lower = this[i * 2 + 1].toInt() and 0xFF shortArray[i] = (upper shl 8 or lower).toShort() } return shortArray }

    Explanation: This extension function allows any ByteArray to be easily converted to a ShortArray by iterating through the bytes and combining them into shorts.

  7. Kotlin convert ByteArray to ShortArray without ByteBuffer

    • Description: Convert a ByteArray to a ShortArray without using ByteBuffer in Kotlin.
    • Code:
      fun byteArrayToShortArray(byteArray: ByteArray): ShortArray { val shortArray = ShortArray(byteArray.size / 2) for (i in shortArray.indices) { shortArray[i] = ((byteArray[i * 2].toInt() shl 8) or (byteArray[i * 2 + 1].toInt() and 0xFF)).toShort() } return shortArray }

    Explanation: This function directly converts each pair of bytes in the ByteArray to shorts in the ShortArray using bitwise operations.

  8. Kotlin ByteArray to ShortArray conversion with ByteBuffer order

    • Description: Convert ByteArray to ShortArray in Kotlin with ByteBuffer setting order.
    • Code:
      fun byteArrayToShortArray(byteArray: ByteArray): ShortArray { val buffer = ByteBuffer.wrap(byteArray) buffer.order(ByteOrder.LITTLE_ENDIAN) // Optional: Set byte order if needed val shortArray = ShortArray(byteArray.size / 2) buffer.asShortBuffer().get(shortArray) return shortArray }

    Explanation: This function showcases converting ByteArray to ShortArray using ByteBuffer with an optional setting for byte order.

  9. Kotlin convert byte array to short array using ByteBuffer flip

    • Description: Convert a ByteArray to a ShortArray in Kotlin using ByteBuffer flip.
    • Code:
      fun byteArrayToShortArray(byteArray: ByteArray): ShortArray { val buffer = ByteBuffer.wrap(byteArray) val shortBuffer = buffer.asShortBuffer() val shortArray = ShortArray(shortBuffer.remaining()) shortBuffer.get(shortArray) return shortArray }

    Explanation: This code snippet uses ByteBuffer to wrap the ByteArray and extract a ShortArray by flipping the buffer.

  10. Kotlin convert ByteArray to ShortArray using extension function with ByteBuffer

    • Description: Extension function to convert ByteArray to ShortArray using ByteBuffer in Kotlin.
    • Code:
      fun ByteArray.toShortArray(): ShortArray { val buffer = ByteBuffer.wrap(this) val shortArray = ShortArray(this.size / 2) buffer.asShortBuffer().get(shortArray) return shortArray }

    Explanation: This extension function provides a concise way to convert any ByteArray to a ShortArray using ByteBuffer.

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