generate unique number in java code example

Example 1: how to generate a random number in java

import java.util.Random;

Random rand = new Random();
int maxNumber = 10;

int randomNumber = rand.nextInt(maxNumber) + 1;

System.out.println(randomNumber);

Example 2: java random unique number

String id = UUID.randomUUID().toString();

Example 3: java random number generator in range

int rand = ThreadLocalRandom.current().nextInt(x,y);