public static void populatePersons() {	
		GregorianCalendar myCal = new GregorianCalendar();
		String[] firstNames =     { "Hubert", "Marshall", "Chase", "Oliver", "Randall",
				            "Anthony", "Quinton", "Bill", "Darryl", "Franklin",
		                            "Jane", "Eileen", "Tara", "Sylvia", "Penny",
		                            "Geraldine", "Indira", "Kelly", "Larissa", "Vera" };
		String[] middleNames =    { "C", "J", "M", "O", "J", "A", "E", "T", "", "" };
		String[] lastNames =      { "Arnold", "Goldschmidt", "Smith", "Davis", "White",
				            "Ridgeway", "Burke", "Shapiro", "Williams", "Moore", 
				            "Gray", "Singh", "Wu", "Peterson", "Phillips", "Jackson",
				            "Johnson", "Dasgupta", "Henderson", "Sommers", "Morgan" };
		Student.Major[] majors =  { Student.Major.ACCOUNTING, Student.Major.CHEMISTRY, 
				            Student.Major.PHILOSOPHY, Student.Major.COMPUTER_SCIENCE,
				            Student.Major.ECONOMICS, Student.Major.ENGLISH,
				            Student.Major.PSYCHOLOGY, Student.Major.THEOLOGY ,
				            Student.Major.BUSINESS_ADMINISTRATION, Student.Major.ART };
			
		Instructor.Department[] 
				depts =   { Instructor.Department.ARTS_AND_SCIENCES,
				            Instructor.Department.EDUCATION,
				            Instructor.Department.ENGINEERING,
				            Instructor.Department.LIBERAL_ARTS };
		
		for (int i=1; i <=40; i++) {
			Student myStudent = new Student();
			myStudent.setId(i);
			String firstName = firstNames[random(0,19)];
			String lastName = lastNames[random(0,19)];
			myStudent.setFirstName(firstName);
			myStudent.setMiddleName(middleNames[random(0,9)]);
			myStudent.setLastName(lastName);
			myCal.set(random(1980, 1994), random(0, 11), random(1, 28));
			myStudent.setBirthdate(myCal.getTime());
			myStudent.setEmail(lastName.toLowerCase() + firstName.toLowerCase().charAt(0) + "@students.acme.edu");
			myStudent.setSsn(random(100,999) + "-" + random(10,99) + "-" + random(1000,9999));
			myStudent.setMajor(majors[random(0,9)]);
			int myRand = random(1,10);
			if (myRand < 8) 
				myStudent.setStatus(Student.Status.UNDERGRADUATE);
			else if (myRand == 10)
				myStudent.setStatus(Student.Status.NONMATRICULATING);
			else
				myStudent.setStatus(Student.Status.GRADUATE);
			
			addToCollections(myStudent, personArrayList);
			addToCollections(myStudent, personLinkedList);
			addToCollections(myStudent, personHashSet);
		}
		
		for (int i=1; i <=10; i++) {
			Instructor myInstructor = new Instructor();
			myInstructor.setId(500+i);
			String firstName = firstNames[random(0,19)];
			String lastName = lastNames[random(0,19)];
			myInstructor.setFirstName(firstName);
			myInstructor.setMiddleName(middleNames[random(0,9)]);
			myInstructor.setLastName(lastName);
			myCal.set(random(1950, 1988), random(0, 11), random(1, 28));
			myInstructor.setBirthdate(myCal.getTime());
			myInstructor.setEmail(lastName.toLowerCase() + firstName.toLowerCase().charAt(0) +  "@acme.edu");
			myInstructor.setSsn(random(100,999) + "-" + random(10,99) + "-" + random(1000,9999));
			myInstructor.setDepartment(depts[random(0,3)]);
			
			addToCollections(myInstructor, personArrayList);
			addToCollections(myInstructor, personLinkedList);
			addToCollections(myInstructor, personHashSet);
		}
	}