public class DateMain {


public static void main (String[] args)
{
Date d1 = new Date(2011, 01, 31);
Date d2 = new Date(2011, 03, 01);

System.out.println("Date objects d1 and d2 constructed");
System.out.println("Method setDate called indirectly");
System.out.println();

System.out.println("Using default date format");

System.out.println("d1.toString() = " + d1); // fixa
System.out.println("d2.toString() = " + d2); // fixa
System.out.println();


System.out.println("d1.getYear() = " + d1.getYear());
System.out.println("d1.getMonth() = " + d1.getMonth());
System.out.println("d1.getDay() = " + d1.getDay());
System.out.println();


//System.out.println("d1.compareTo(d2) = " + d1.compareTo(d2)); // fixa
//System.out.println("d2.compareTo(d1) = " + d2.compareTo(d1)); // fixa
//System.out.println("d1.compareTo(d1) = " + d1.compareTo(d1)); // fixa




}

}

//implements comparable

public class Date

{
private int theYear;
private int theMonth;
private int theDay;

public Date()
{
this(0, 0, 0);
}

public Date(int y, int m, int d)
{
setDate(y, m, d);
}

public void setDate(int y, int m, int d)
{
theYear = y;
theMonth = m;
theDay = d;
}

public int getYear()
{
return theYear;
}

public int getMonth()
{
return theMonth;
}

public int getDay()
{
return theDay;
}

public String toString()
{

return (theYear + "-" + theMonth + "-" + theDay);
}



}

public class Date implements Comparable<Date>
{
private int Day;
private int Month;
private int Year;



public void setDate( int theYear, int theMonth, int theDay)
{
Year = ( theYear >= 0000 && theYear <= 9999) ? theYear : 0;
Month =( theMonth >=1 && theMonth <= 12) ? theMonth : 0;
Day = ( theDay >=1 && theDay <= 31) ? theDay : 0;

if ((Month == 1 || Month == 3 || Month == 5 || Month == 7 || Month == 8 || Month == 10 || Month 12) && Day >32)
{
Day - 31 = Day;
Month + 1 = Month;
}
else if (Month == 4 || Month == 6 || Month == 9 || Month == 11) && Day >31)
{
Day - 30 = Day;
Month + 1 = Month;
}
else if (Month == 2 && Day > 29)
{
Day - 28 = Day;
Month + 1 = Month;
}
if (Month > 12)
{
Year + 1 = Year;
}
}

int getYear()
{
return Year;
}

int getMonth()
{
return Month;
}

int getDay()
{
return Day;
}

Date NextDate()
{
Date nxt = new Date();

nxt.Day = Day + 1;
return nxt;
}

Date prevDate()
{
Date prv = new Date();

prv.Day = Day - 1;
return prv;
}

public int compareTo(Date theDate)
{
if (Date() < theDate())
{
return -1;
} else if (Date() > theDate())
{
return +1;
} else (Date() == theDate())
{
return 0;
}
}
String toString()
{
// Svenska
return "("+ Year + "-" + Month + "-" + Day + ")";
// US
return "("+ Month + "/" + Day + "/" + Year + ")";
}}