public class PriorityQueueTester
{
   public static void main(String[] args) {
       Student s1 = new Student("Ned Flanders", 10000, "Graduate", 550.0);
       Student s2 = new Student("Mickey Mouse", 20000, "Undergraduate", 1000.0);
       Student s3 = new Student("Harry Potter", 30000, "Graduate", 300.0);
       Student s4 = new Student("Elvis Presley", 40000, "Undergraduate");
       Student s5 = new Student("Mr. T", 50000, "Graduate");
       Student s6 = new Student("Jennifer Lopez", 60000, "Undergraduate");
       Student s7 = new Student("Britney Spears", 70000, 550.0);
       Student s8 = new Student("Papa Smurf", 80000, 1150.0);
       Student s9 = new Student("Clark Kent", 90000, 800.0);
       Student s10 = new Student("Winnie The Pooh", 10011);
       Student s11 = new Student("Homer Simpson", 10012);
       Student s12 = new Student("Marge Simpson", 10012);
       
       PriorityQueue pq = new PriorityQueue();
       pq.insert(s7);
       pq.insert(s1);
       pq.insert(s11);
       pq.insert(s3);
       pq.insert(s10);
       pq.insert(s8);
       pq.insert(s2);
       pq.insert(s5);
       pq.insert(s9);
       pq.insert(s4);
       pq.insert(s6);
       pq.insert(s12); //testing duplicate number

       s1.addClasses(3);
       s2.addClasses(1);
       s3.addClasses(4);
       s1.addClasses(2);
       s4.addClasses(5);
       s5.addClasses(2);
       s6.addClasses(6);
       System.out.println("All the students:");
       System.out.println(pq);

       PriorityQueue pq2 = pq.filter("Undergraduate",5000.0);
       System.out.println("All Undergraduates with total tuition <= $5000:");
       System.out.println(pq2);

       pq.remove(30000);
       pq.remove(50000);
       pq.remove(90000);
       System.out.println("The list with 3 of the students removed:");
       System.out.println(pq);
   }

} //end of PQtester