//Date2.java
//example of different constructors

public class Date2 {
    private int year;  
    private int month;
    private int day;
    
    //**can have multiple "overloaded" constructors.
    //differ by and are differentiated by parameter list.
    //convenience to client.

    //**"no-arg" (0 parameters) constructor.
    //this one sets date to Java/Unix "epoch" of 1/1/1970
    public Date2() {
	month = 1;
	day = 1;
	year = 1970;
    }

    public Date2(int newMonth, int newDay, int newYear) {
	month = newMonth;
	day = newDay;
	year = newYear;
    }

    //** "copy" constructor.  parameter is another object of same class.
    //makes this object a copy of the other.
    //can access private members of other objects of the same class.
    public Date2( Date2 other) {
	month = other.month;
	day = other.day;
	year = other.year;
    }

    //**another possibility is a constructor with a String parameter in the
    // mm/dd/yyyy form.  Extract the 3 values using a StringTokenizer
    public Date2( String date) {
	//use / as the tokens' delimiter
	java.util.StringTokenizer st = new java.util.StringTokenizer(date,"/");

	month = Integer.parseInt(st.nextToken()); //extract next token
	day =   Integer.parseInt(st.nextToken());
	year =  Integer.parseInt(st.nextToken());
    }

    public void increment() {
	day++;   //stub for the actual method to be written later...
    }

    public int getYear() {
	return year;
    }
    
    public int getMonth() {
	return month;
    }
    
    public int getDay() {
	return day;
    }
    
    public String toString() {
	return(month + "/" + day + "/" + year);
    }
}
/*
client code:
  Date2 d0 = new Date2(5,15,1998);  //3 int constructor
  Date2 d1 = new Date2();           //no-arg constructor
  Date2 d2 = new Date2("12/23/1999");  //String parameter constructor
  Date2 d3 = new Date2(d2);   //copy constructor, d2 is parameter to be copied.

*/

/* Other features that could be added:
incrementYear()
incrementMonth()
incrementDay()
validate the initializing date
add data member day_of_week
julian day (day of year)
epoch day (day since 1/1/1970)
zodiac sign 
holiday (either particular day, eg. Dec. 25, or within range, eg. Thanksgiving)
*/