In the main method, you must instantiate RandomNumberGenerator and invoke the generateRandomNumber() and getRandomNumber() methods via the instance of RandomNumberGenerator. 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 usage
import java.util.Random;
Random rndm = new Random();
int mnmbr = 10;
int rndNumber = rndm.nextInt(mnumber) + 1;
System.out.println(rndNumber);