need junit for random number generator

import java.util.Random;

/**

• The Class RandomNumberGenerator. */ public class RandomNumberGenerator {

  /**

  • Instantiates a new random number generator. */ private RandomNumberGenerator() { }

  /**

  • Generate random number.
  • @return the int */ public static int generateRandomNumber() { Random random = new Random(); random.setSeed(System.currentTimeMillis()); return random.nextInt(9000) + 1000; } }