// Weekday class and Day enum.


// class using Day enumeration
public class Weekday {

	//Define an enum for use in this class
	// for wider use, put in a file of its own
	// with usual java naming -- Day.java in this case
	enum Day {
	    SUNDAY, MONDAY, TUESDAY, WEDNESDAY, 
	    THURSDAY, FRIDAY, SATURDAY 
	}


    // enum is now a type which can take on only selected values
    Day day;
    
    public Weekday(Day day) {
        this.day = day;
    }
    
    // print out which classes I have today
    public void classes() {
        // enums can be used in switch statements
        switch (day) {
        case MONDAY: 
        case WEDNESDAY:
            System.out.println("VB and 102");
            break;
        case TUESDAY: 
        case THURSDAY:
            System.out.println("Java and 102");
            break;
            
        case FRIDAY: 
            System.out.println("Meetings");
            break;
            
        case SATURDAY:
        case SUNDAY: 
        	// my best subject
            System.out.println("sleep.");
            break;
        }
        
    }
    
    public String toString() {
        return day.toString();
    }
    
    public static void main(String[] args) {
		// various variables
        Weekday firstDay = new Weekday(Day.MONDAY);
        firstDay.classes();
        Weekday thirdDay = new Weekday(Day.THURSDAY);
        thirdDay.classes();
        Weekday fifthDay = new Weekday(Day.FRIDAY);
        fifthDay.classes();
        Weekday sixthDay = new Weekday(Day.SATURDAY);
        sixthDay.classes();
        Weekday seventhDay = new Weekday(Day.SUNDAY);
        seventhDay.classes();
        
        // enum type has .values() which returns array of enum values
        Weekday [] daylist = new Weekday[Day.values().length];
        // foreach loop -- curr is set to each Day in the array in turn
        for(Day curr : Day.values()) {
            // .ordinal method pulls int position out of enum
            daylist[curr.ordinal()] = new Weekday(curr);
        }
        
        //Weekday q = new Weekday(Day.valueOf("TUESDAY"));
        Weekday q = new Weekday(Day.valueOf("Tuesday".toUpperCase()));
        // causes Exception
        //Weekday q = new Weekday(Day.valueOf("Tuesday"));
        Weekday q = new Weekday(Day.valueOf("Tuesday".toUpperCase()));
        
        System.out.println(q);
    }
}