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JulianCalendar.IsLeapYear Method (Int32, Int32)

Determines whether the specified year in the specified era is a leap year.

Namespace: System.Globalization
Assembly: mscorlib (in mscorlib.dll)

public override bool IsLeapYear (
	int year,
	int era
)
public boolean IsLeapYear (
	int year, 
	int era
)
public override function IsLeapYear (
	year : int, 
	era : int
) : boolean
Not applicable.

Parameters

year

An integer that represents the year.

era

An integer that represents the era.

Return Value

true if the specified year is a leap year; otherwise, false.

Exception typeCondition

ArgumentOutOfRangeException

year is outside the range supported by the calendar.

-or-

era is outside the range supported by the calendar.

Unlike the Gregorian calendar, the Julian calendar defines a leap year as a year that is evenly divisible by four with no exceptions. Therefore, the calendar is inaccurate by one day every 128 years. For example, the year 1999 was not a leap year, but the year 2000 was. A common year has 365 days and a leap year has 366 days.

The following code example calls IsLeapYear for five years in each of the eras.

using System;
using System.Globalization;


public class SamplesJulianCalendar  {

   public static void Main()  {

      // Creates and initializes a JulianCalendar.
      JulianCalendar myCal = new JulianCalendar();

      // Displays the header.
      Console.Write( "YEAR\t" );
      for ( int y = 2001; y <= 2005; y++ )
         Console.Write( "\t{0}", y );
      Console.WriteLine();

      // Checks five years in the current era.
      Console.Write( "CurrentEra:" );
      for ( int y = 2001; y <= 2005; y++ )
         Console.Write( "\t{0}", myCal.IsLeapYear( y, JulianCalendar.CurrentEra ) );
      Console.WriteLine();

      // Checks five years in each of the eras.
      for ( int i = 0; i < myCal.Eras.Length; i++ )  {
         Console.Write( "Era {0}:\t", myCal.Eras[i] );
         for ( int y = 2001; y <= 2005; y++ )
            Console.Write( "\t{0}", myCal.IsLeapYear( y, myCal.Eras[i] ) );
         Console.WriteLine();
      }

   }

}

/*
This code produces the following output.

YEAR            2001    2002    2003    2004    2005
CurrentEra:     False   False   False   True    False
Era 1:          False   False   False   True    False

*/

import System.*;
import System.Globalization.*;

public class SamplesJulianCalendar
{   
    public static void main(String[] args)
    {
        // Creates and initializes a JulianCalendar.
        JulianCalendar myCal =  new JulianCalendar();

        // Displays the header.
        Console.Write("YEAR\t");
        for(int y=2001;y <= 2005;y++) {
            Console.Write("\t{0}",System.Convert.ToString(y));
        } 
        Console.WriteLine();

        // Checks five years in the current era.
        Console.Write("CurrentEra:");
        for(int y=2001;y <= 2005;y++) {
            Console.Write("\t{0}",
                System.Convert.ToString(myCal.IsLeapYear(y,
                JulianCalendar.CurrentEra)));
        } 
        Console.WriteLine();

        // Checks five years in each of the eras.
        for(int i=0;i < myCal.get_Eras().length;i++) {
            Console.Write("Era {0}:\t",
                System.Convert.ToString(myCal.get_Eras().get_Item(i)));
            for(int y=2001;y <= 2005;y++) {
                Console.Write("\t{0}",
                    System.Convert.ToString(myCal.IsLeapYear(y,
                    System.Convert.ToInt32(myCal.get_Eras().get_Item(i)))));
            } 
            Console.WriteLine();
        } 
    } //main
} //SamplesJulianCalendar

/*
This code produces the following output.

YEAR            2001    2002    2003    2004    2005
CurrentEra:     False   False   False   True    False
Era 1:          False   False   False   True    False

*/

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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