import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;

public class Supermarker {

public static void main(String[] args) {
   // TODO code application logic here

   /**
      * a) What is the maximum number of customers in the queue at any time?
      * b) What is the longest wait any one customer experiences?
      * c) What happens if the arrival interval is changed from 1 to 4 minutes to 1
      * to 3 minutes?
      */
   process(4);
   System.out.println("========================================================================================================");
   System.out.println("");
   // reset the number of customers so that we could have better output
   Customer.number = 0;
   process(3);
   System.out.println("========================================================================================================");
   /**
      * if the arrival interval is changed from 1 to 4 minutes to 1
      * to 3 minutes, there will be more costumer getting severed
      * longest waiting time will be reduced
      * the max number of waiting customer will be reduced as well
      */
}

private static void process(int interval) {
   SecureRandom random;
   int service_time;
   int arrival_time;
   final int SIMULATION_TIME = 720;
   Queue<Customer> waitingQueue = new Queue<>();
   Queue<Customer> arrivingQueue = new Queue<>();
   Queue<Customer> serveredQueue = new Queue<>();
   Queue<Customer> tmp = new Queue<>();
   Customer current;
   Customer aCustomer;
   int queueMax = 1;
   try {
         random = SecureRandom.getInstance("SHA1PRNG");
         /**
         * Choose a random integer between 1 and 4 to determine the minute
         * at which the first customer arrives.
         */
         arrival_time = random.nextInt(interval) + 1;
         arrivingQueue.enqueue(new Customer(arrival_time));
         current = arrivingQueue.dequeue();
         service_time = random.nextInt(interval) + 1;
         current.setService_time(service_time + arrival_time);

Write a program that draws random (random) narrated a number of 3-d...