Driver.java

package cs1302.example;

import java.util.Queue;
import java.util.ArrayDeque;
import java.util.PriorityQueue;

/**
 * Interface example app.
 * @see https://docs.oracle.com/javase/8/docs/api/java/util/Queue.html
 * @see https://docs.oracle.com/javase/8/docs/api/java/util/ArrayDeque.html
 * @see https://docs.oracle.com/javase/8/docs/api/java/util/PriorityQueue.html
 */
public class Driver {

    public static void fillQueue(Queue q, int[] nums) {
        for (int num : nums) {
            q.add(num);
        } // for
    } // fillQueue

    public static void processQueue(Queue q) {
        System.out.println("processing queue:");
        while (!q.isEmpty()) {
            System.out.print("handling ticket ");
            System.out.println(q.poll());
        } // while
    } // processQueue

    public static void main(String[] args) {

        int nums[] = new int[] { 9, 1, 3, 2, 7 };

        Queue q1 = new ArrayDeque();    // boss says first-come-first-serve is okay
        fillQueue(q1, nums);

        Queue q2 = new PriorityQueue(); // boss says we must handle according to priority
        fillQueue(q2, nums);

        processQueue(q1);
        processQueue(q2);

    } // main

} // Driver