@Override
    public String toString()
    {
        switch(this)
        {
            case CRN:
                return "CRN";	
            case INSTRUCTOR:
                return "Instructor";
            case TIME:
                return "Time";	// TimePeriod object
            case DAY:
                return "Day";	// ArrayList of Day enums
            case NAME:
                return "Name";
            case DEPT:
                return "Department";
            case BLDG:
                return "Building";
            case CRDT:
            	return "Credits";
            default:
                return "";
        }
    }