Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)
companion object Default : Random
The default random number generator.
On JVM this generator is thread-safe, its methods can be invoked from multiple threads.
import kotlin.random.Random
import kotlin.test.assertTrue
fun main(args: Array<String>) {
//sampleStart
val randomValues = List(10) { Random.nextInt(0, 100) }
// prints new sequence every time
println(randomValues)
val nextValues = List(10) { Random.nextInt(0, 100) }
println(nextValues)
println("randomValues != nextValues is ${randomValues != nextValues}") // true
//sampleEnd
}
Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)
Gets the next random bitCount number of bits.
fun nextBits(bitCount: Int): Int
Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)
Gets the next random Boolean value.
fun nextBoolean(): Boolean
Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)
Fills the specified byte array with random bytes and returns it.
fun nextBytes(array: ByteArray): ByteArray
Creates a byte array of the specified size, filled with random bytes.
fun nextBytes(size: Int): ByteArray
Fills a subrange of the specified byte array starting from fromIndex inclusive and ending toIndex exclusive with random bytes.
fun nextBytes(
array: ByteArray,
fromIndex: Int,
toIndex: Int
): ByteArray
Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)
Gets the next random Double value uniformly distributed between 0 (inclusive) and 1 (exclusive).
Gets the next random non-negative Double from the random number generator less than the specified until bound.
fun nextDouble(until: Double): Double
Gets the next random Double from the random number generator in the specified range.
fun nextDouble(from: Double, until: Double): Double
Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)
Gets the next random Float value uniformly distributed between 0 (inclusive) and 1 (exclusive).
Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)
Gets the next random Int from the random number generator.
Gets the next random non-negative Int from the random number generator less than the specified until bound.
fun nextInt(until: Int): Int
Gets the next random Int from the random number generator in the specified range.
fun nextInt(from: Int, until: Int): Int
Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)
Gets the next random Long from the random number generator.
Gets the next random non-negative Long from the random number generator less than the specified until bound.
fun nextLong(until: Long): Long
Gets the next random Long from the random number generator in the specified range.
fun nextLong(from: Long, until: Long): Long