Java Random - longs() Method

The java.util.Random.longs() method returns a stream producing the given streamSize number of pseudorandom long, each conforming to the given origin (inclusive) and bound (exclusive).

Syntax

public LongStream longs(long streamSize,
                        long randomNumberOrigin,
                        long randomNumberBound)

Parameters

Return Value

Returns a stream of pseudorandom long values, each with the given origin (inclusive) and bound (exclusive).

Exception

• Throws IllegalArgumentException, if streamSize is less than zero.
• Throws IllegalArgumentException, if randomNumberOrigin is greater than or equal to randomNumberBound.

Example:

In the example below, the java.util.Random.longs() method is used to get a stream of pseudorandom long values in the given range.

import java.util.*;
import java.util.stream.LongStream;

public class MyClass {
  public static void main(String[] args) {
    //creating a random object
    Random rand = new Random();

    //generating a stream containing 10 long random
    //numbers between 500(inclusive) and 1000(exclusive)
    LongStream stream = rand.longs(10, 500, 1000);

    //printing all random numbers from the stream
    stream.forEach(System.out::println); 
  }
}

One of the possible outcome is given below:

740
558
989
934
852
937
525
503
646
980