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- Question: kotlin int to byte array
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kotlin int to byte array
To convert an Int
value to a byte array in Kotlin, you can use the ByteBuffer
class. Here’s an example:
kotlinval value: Int = 123456789 // the value you want to convert to a byte array val buffer = ByteBuffer.allocate(4) // allocate a buffer of 4 bytes (an Int is 4 bytes) buffer.putInt(value) // put the Int value into the buffer val byteArray: ByteArray = buffer.array() // get the byte array from the buffer // print out the byte array as hex values for (b in byteArray) { print(String.format("%02x ", b)) }
Output:
bash07 5b cd 15
In this example, we first allocate a buffer of 4 bytes using the ByteBuffer.allocate()
method. We then put the Int
value into the buffer using the putInt()
method. Finally, we get the byte array from the buffer using the array()
method.
Note that the byte order used by ByteBuffer
is the native byte order of the system. If you need to specify a specific byte order, you can use the order()
method on the ByteBuffer
object before putting the value into the buffer.
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scala int to byte array
To convert an integer value to a byte array in Scala, you can use the ByteBuffer
class from the java.nio
package. Here’s an example code snippet:
scalaimport java.nio.ByteBuffer val value: Int = 12345 val buffer: ByteBuffer = ByteBuffer.allocate(Integer.BYTES).putInt(value) val byteArray: Array[Byte] = buffer.array()
In the above code, we first define the integer value 12345
. We then create a new ByteBuffer
with a capacity of 4 bytes (the size of an int
in Java). We then put the integer value into the buffer using the putInt
method, which writes the integer value as four bytes in the buffer in the order of most significant byte first. Finally, we retrieve the byte array from the buffer using the array
method.
Note that the byte array returned by the array
method is backed by the buffer, so any changes made to the byte array will be reflected in the buffer and vice versa. If you need a copy of the byte array that is independent of the buffer, you can use the array
method with no arguments to create a new byte array:
scalaval byteArray: Array[Byte] = buffer.array().clone()
kotlin outputstream to byte array
In Kotlin, you can use the ByteArrayOutputStream
class to write data to a byte array. Here is an example:
kotlinimport java.io.ByteArrayOutputStream fun main() { val outputStream = ByteArrayOutputStream() outputStream.write("Hello, World!".toByteArray()) val byteArray = outputStream.toByteArray() println(byteArray.contentToString()) }
In this example, we create an instance of ByteArrayOutputStream
and use its write
method to write a string to the stream. Finally, we call the toByteArray
method to get the byte array representation of the stream’s contents. We then print the byte array using the contentToString
method.
The output of this program will be:
csharp[72, 101, 108, 108, 111, 44, 32, 87, 111, 114, 108, 100, 33]
which is the ASCII representation of the string “Hello, World!”.
You can see some more information related to kotlin int to byte array here
- How can I convert an Int to a ByteArray and … – Stack Overflow
- Kotlin intArray to byteArray – GitHub Gist
- Kotlin: UInt to ByteArray – Medium
- ByteArray – Kotlin Programming Language
- Kotlin – Convert String to Byte Array – Tutorial Kart
- kotlin.ByteArray Kotlin官方教程 _w3cschool – 编程狮
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