kotlin-stdlib/kotlin.random/Random/nextBytes

nextBytes

open fun nextBytes( array: ByteArray, fromIndex: Int = 0, toIndex: Int = array.size): ByteArray(source)

Fills a subrange of the specified byte array starting from fromIndex inclusive and ending toIndex exclusive with random bytes.

Return

array with the subrange filled with random bytes.

Samples



import kotlin.math.sin


import kotlin.random.Random


import kotlin.test.assertTrue
fun main() { 
   //sampleStart 
   val bytes = ByteArray(4)
println(bytes.contentToString()) // [0, 0, 0, 0]

Random.nextBytes(bytes, 1, 3)
// second and third bytes are generated, rest unchanged
println(bytes.contentToString())

Random.nextBytes(bytes)
// all bytes are newly generated
println(bytes.contentToString())

val newBytes = Random.nextBytes(5)
// a new byte array filled with random values
println(newBytes.contentToString()) 
   //sampleEnd
}

open fun nextBytes(array: ByteArray): ByteArray(source)

Fills the specified byte array with random bytes and returns it.

Return

array filled with random bytes.

Samples



import kotlin.math.sin


import kotlin.random.Random


import kotlin.test.assertTrue
fun main() { 
   //sampleStart 
   val bytes = ByteArray(4)
println(bytes.contentToString()) // [0, 0, 0, 0]

Random.nextBytes(bytes, 1, 3)
// second and third bytes are generated, rest unchanged
println(bytes.contentToString())

Random.nextBytes(bytes)
// all bytes are newly generated
println(bytes.contentToString())

val newBytes = Random.nextBytes(5)
// a new byte array filled with random values
println(newBytes.contentToString()) 
   //sampleEnd
}

open fun nextBytes(size: Int): ByteArray(source)

Creates a byte array of the specified size, filled with random bytes.

Samples



import kotlin.math.sin


import kotlin.random.Random


import kotlin.test.assertTrue
fun main() { 
   //sampleStart 
   val bytes = ByteArray(4)
println(bytes.contentToString()) // [0, 0, 0, 0]

Random.nextBytes(bytes, 1, 3)
// second and third bytes are generated, rest unchanged
println(bytes.contentToString())

Random.nextBytes(bytes)
// all bytes are newly generated
println(bytes.contentToString())

val newBytes = Random.nextBytes(5)
// a new byte array filled with random values
println(newBytes.contentToString()) 
   //sampleEnd
}