'Sample Code on how to use multithreading in Visual Basic .Net
Imports System
Imports System.Threading
Public Module ThreadSample
Public Balance As Integer = 1000
Sub Main()
Dim account As Account = New Account()
Dim depositeBalance1 As DepositeBalance = New _
DepositeBalance(account, 1000, "Customer 1")
Dim depositeBalance2 As DepositeBalance = New _
DepositeBalance(account, 1000, "Customer 2")
Dim t1 As Thread = New _
Thread(AddressOf depositeBalance1.DepositeAmount)
Dim t2 As Thread = New _
Thread(AddressOf depositeBalance2.DepositeAmount)
t1.Start()
t2.Start()
Try
t1.Join()
t2.Join()
Catch e As Exception
Console.Write(e.ToString())
Finally
'Do Nothing
End Try
End Sub
Public Class Account
Private balanceAmount As Integer
Public Sub Deposite(ByVal amount As Integer, _
ByVal message As String)
Console.Write(message & _
" Depositing Amount " & amount)
Console.Write(message & " Checking Previous Balance")
Monitor.Enter(Me)
balanceAmount = getBalance()
Console.Write(message & _
" Previous Balance in Account " & balanceAmount)
balanceAmount += amount
Console.Write(message & _
" Updating Balance in Account ")
setBalance(balanceAmount)
Monitor.Exit(Me)
Console.Write(message & " Update Balance " & Balance)
End Sub
Private Function getBalance() As Integer
Try
Thread.sleep(1000)
Catch e As Exception
Console.Write(e.ToString())
Finally
'Do Nothing
End Try
Return Balance
End Function
Private Sub setBalance(ByVal amount As Integer)
Try
Thread.sleep(1000)
Catch e As Exception
Console.Write(e.ToString())
Finally
'Do Nothing
End Try
Balance = amount
End Sub
End Class
Public Class DepositeBalance
Private account As Account
Private amount As Integer
Private message As String
Public Sub new(ByRef account As Account, _
ByVal amount As Integer, ByVal message As String)
MyBase.New()
Me.account = account
Me.amount = amount
Me.message = message
End Sub
Public Sub DepositeAmount()
Account.Deposite(amount, message)
End Sub
End Class
End Module
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Email: Fajarudinsidik@gmail.com
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