VB.Net/Class/Overload — различия между версиями

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Версия 16:40, 26 мая 2010

Overload Constructor Demo

Imports System
Public Class MainClass
    Shared Sub Main(ByVal args As String())
       Dim timeObject As New Time(2005, 3, 25, 9, 35)
       Dim t2 As New Time(timeObject)
       timeObject.DisplayCurrentTime( )
       t2.DisplayCurrentTime( )
    End Sub
End Class
 Public Class Time
    " Private variables
    Private Year As Integer
    Private Month As Integer
    Private Day As Integer
    Private Hour As Integer
    Private Minute As Integer
    Private Second As Integer = 30
    " Public methods
    Public Sub DisplayCurrentTime( )
         System.Console.WriteLine("{0}/{1}/{2} {3}:{4}:{5}", _
             Month, Day, Year, Hour, Minute, Second)
    End Sub "DisplayCurrentTime
    Public Sub New( _
    ByVal theYear As Integer, _
    ByVal theMonth As Integer, _
    ByVal theDate As Integer, _
    ByVal theHour As Integer, _
    ByVal theMinute As Integer)
       Year = theYear
       Month = theMonth
       Day = theDate
       Hour = theHour
       Minute = theMinute
    End Sub
    Public Sub New(existingObject As Time)
       Year = existingObject.Year
       Month = existingObject.Month
       Day = existingObject.Day
       Hour = existingObject.Hour
       Minute = existingObject.Minute
       Second = existingObject.Second
    End Sub
 End Class "Time


Using overloaded methods: Integer and Double

Imports System
Public Class MainClass
    Shared Sub Main(ByVal args As String())
      Console.WriteLine( "The square of Integer 7 is " & _
         Square(7) & vbCrLf & "The square of Double " & _
         "7.5 is " & Square(7.5) )
    End Sub
   Shared Function Square(ByVal value As Integer) As Integer
      Return Convert.ToInt32(value ^ 2)
   End Function " Square
   Shared Function Square(ByVal value As Double) As Double
      Return value ^ 2
   End Function " Square
End Class