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