Default
The default random number generator.
On JVM this generator is thread-safe, its methods can be invoked from multiple threads.
import kotlin.math.sin
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
}
Companion Object Functions
nextBoolean
Gets the next random Boolean value.
fun
nextBoolean
(
)
:
Boolean
nextBytes
Fills the specified byte array with random bytes and returns it.
nextDouble
Gets the next random Double value uniformly distributed between 0 (inclusive) and 1 (exclusive).
fun
nextDouble
(
)
:
Double
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
nextFloat
Gets the next random Float value uniformly distributed between 0 (inclusive) and 1 (exclusive).
fun
nextFloat
(
)
:
Float
nextInt
Gets the next random
Int
from the random number generator.
fun
nextInt
(
)
:
Int
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
nextLong
Gets the next random
Long
from the random number generator.
fun
nextLong
(
)
:
Long
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