JapaneseCalendar.IsLeapDay(Int32, Int32, Int32, Int32) JapaneseCalendar.IsLeapDay(Int32, Int32, Int32, Int32) JapaneseCalendar.IsLeapDay(Int32, Int32, Int32, Int32) JapaneseCalendar.IsLeapDay(Int32, Int32, Int32, Int32) Method

定義

指定した時代 (年号) の指定した日付が閏日かどうかを確認します。Determines whether the specified date in the specified era is a leap day.

public:
 override bool IsLeapDay(int year, int month, int day, int era);
public override bool IsLeapDay (int year, int month, int day, int era);
override this.IsLeapDay : int * int * int * int -> bool
Public Overrides Function IsLeapDay (year As Integer, month As Integer, day As Integer, era As Integer) As Boolean

パラメーター

year
Int32 Int32 Int32 Int32

年を表す整数。An integer that represents the year.

month
Int32 Int32 Int32 Int32

月を表す 1 から 12 の整数。An integer from 1 to 12 that represents the month.

day
Int32 Int32 Int32 Int32

日を表す 1 から 31 の整数。An integer from 1 to 31 that represents the day.

era
Int32 Int32 Int32 Int32

時代 (年号) を表す整数。An integer that represents the era.

戻り値

指定した日が閏日である場合は true。それ以外の場合は falsetrue, if the specified day is a leap day; otherwise, false.

例外

year がカレンダーでサポートされている範囲外です。year is outside the range supported by the calendar.

または-or- month がカレンダーでサポートされている範囲外です。month is outside the range supported by the calendar.

または-or- day がカレンダーでサポートされている範囲外です。day is outside the range supported by the calendar.

または-or- era がカレンダーでサポートされている範囲外です。era is outside the range supported by the calendar.

次の例でIsLeapDayは、2番目の月の最終日 (2 月) について、各時代 (年号) の5年を呼び出します。The following example calls IsLeapDay for the last day of the second month (February) for five years in each of the eras. 出力例の現在の時代 (年号) は、Reiwa 時代 (年号) です。The current era in the example output is the Reiwa era.


using namespace System;
using namespace System::Globalization;

int main()
{
   // Creates and initializes a JapaneseCalendar.
   JapaneseCalendar^ myCal = gcnew JapaneseCalendar;
   
   // Creates a holder for the last day of the second month (February)->
   int iLastDay;
   
   // Displays the header.
   Console::Write( "YEAR\t" );
   for ( int y = 1; y <= 5; y++ )
      Console::Write( "\t {0}", y );
   Console::WriteLine();
   
   // Checks five years in the current era.
   Console::Write( "CurrentEra:" );
   for ( int y = 1; y <= 5; y++ )
   {
      iLastDay = myCal->GetDaysInMonth( y, 2, JapaneseCalendar::CurrentEra );
      Console::Write( "\t {0}", myCal->IsLeapDay( y, 2, iLastDay, JapaneseCalendar::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 = 1; y <= 5; y++ )
      {
         iLastDay = myCal->GetDaysInMonth( y, 2, myCal->Eras[ i ] );
         Console::Write( "\t {0}", myCal->IsLeapDay( y, 2, iLastDay, myCal->Eras[ i ] ) );
      }
      Console::WriteLine();
   }
}
/*
This code produces the following output.

YEAR            1       2       3       4       5
CurrentEra:     False   True    False   False   False
Era 5:          False   True    False   False   False
Era 4:          False   False   False   True    False
Era 3:          False   False   True    False   False
Era 2:          True    False   False   False   True
Era 1:          True    False   False   False   True

*/
using System;
using System.Globalization;

public class SamplesJapaneseCalendar  
{
   public static void Main()  
   {
      // Creates and initializes a JapaneseCalendar.
      JapaneseCalendar myCal = new JapaneseCalendar();

      // Creates a holder for the last day of the second month (February).
      int iLastDay;

      // Displays the header.
      Console.Write( "YEAR\t" );
      for ( int y = 1; y <= 5; y++ )
         Console.Write( "\t{0}", y );
      Console.WriteLine();

      // Checks five years in the current era.
      Console.Write( "CurrentEra:" );
      for ( int y = 1; y <= 5; y++ )  {
         iLastDay = myCal.GetDaysInMonth( y, 2, JapaneseCalendar.CurrentEra );
         Console.Write( "\t{0}", myCal.IsLeapDay( y, 2, iLastDay, JapaneseCalendar.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 = 1; y <= 5; y++ )  {
            iLastDay = myCal.GetDaysInMonth( y, 2, myCal.Eras[i] );
            Console.Write( "\t{0}", myCal.IsLeapDay( y, 2, iLastDay, myCal.Eras[i] ) );
         }
         Console.WriteLine();
      }
   }
}
/*
This code produces the following output.

YEAR            1       2       3       4       5
CurrentEra:     False   True    False   False   False
Era 5:          False   True    False   False   False
Era 4:          False   False   False   True    False
Era 3:          False   False   True    False   False
Era 2:          True    False   False   False   True
Era 1:          True    False   False   False   True

*/
Imports System.Globalization

Public Class SamplesJapaneseCalendar   
   Public Shared Sub Main()
      ' Creates and initializes a JapaneseCalendar.
      Dim myCal As New JapaneseCalendar()

      ' Creates a holder for the last day of the second month (February).
      Dim iLastDay As Integer

      ' Displays the header.
      Console.Write("YEAR" + ControlChars.Tab)
      Dim y As Integer
      For y = 1 To 5
         Console.Write(ControlChars.Tab + "{0}", y)
      Next y
      Console.WriteLine()

      ' Checks five years in the current era.
      Console.Write("CurrentEra:")
      For y = 1 To 5
         iLastDay = myCal.GetDaysInMonth(y, 2, JapaneseCalendar.CurrentEra)
         Console.Write(ControlChars.Tab + "{0}", myCal.IsLeapDay(y, 2, iLastDay, JapaneseCalendar.CurrentEra))
      Next y
      Console.WriteLine()

      ' Checks five years in each of the eras.
      Dim i As Integer
      For i = 0 To myCal.Eras.Length - 1
         Console.Write("Era {0}:" + ControlChars.Tab, myCal.Eras(i))
         For y = 1 To 5
            iLastDay = myCal.GetDaysInMonth(y, 2, myCal.Eras(i))
            Console.Write(ControlChars.Tab + "{0}", myCal.IsLeapDay(y, 2, iLastDay, myCal.Eras(i)))
         Next y
         Console.WriteLine()
      Next i
   End Sub
End Class 
'This code produces the following output.
'
'      YEAR            1       2       3       4       5
'      CurrentEra:     False   True    False   False   False
'      Era 5:          False   True    False   False   False
'      Era 4:          False   False   False   True    False
'      Era 3:          False   False   True    False   False
'      Era 2:          True    False   False   False   True
'      Era 1:          True    False   False   False   True

注釈

和暦の閏年は、グレゴリオ暦の閏年と同じ年に対応します。Leap years in the Japanese calendar correspond to the same leap years in the Gregorian calendar. グレゴリオ暦の閏年は、100 で割り切れる場合を除き、4 で割り切れるグレゴリオ暦の年として定義されます。A leap year in the Gregorian calendar is defined as a Gregorian year that is evenly divisible by four, except if it is divisible by 100. ただし、400 で割り切れるグレゴリオ暦の年は閏年です。However, Gregorian years that are divisible by 400 are leap years. 平年は 365 日で、閏年は 366 日です。A common year has 365 days and a leap year has 366 days.

閏年は、閏年にのみ発生する日です。A leap day is a day that occurs only in a leap year. たとえば、Nigatsu の29日 (2 月) は唯一の閏日です。For example, the 29th day of Nigatsu (February) is the only leap day.

適用対象

こちらもご覧ください