Java comes with many different ways to generate random integers, even if you need to specify a lower and upper bound to constrain your required value for.
Option 1 – ThreadLocalRandom
Specify the min and max values:
import java.util.concurrent.ThreadLocalRandom;
int randomNum = ThreadLocalRandom.current().nextInt(min, max + 1);
Option 2 – Random
Between `` (inclusive) and the specified value (exclusive):
import java.util.Random;
Random rn = new Random();
int range = maximum - minimum + 1;
int randomNum = rn.nextInt(range) + minimum;
Option 3 – Multiple values
import java.util.Random;
Random r = new Random();
int[] fiveRandomNumbers = r.ints(5, 0, 11).toArray();
int randomNumber = r.ints(1, 0, 11).findFirst().getAsInt();
