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POHow to ensure instances of class finish before main terminates?
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copied!<p>I have a MultiThreading issue and conceptual question using Visual Basic (but it applies to almost all languages). I have a function which:</p> <ol> <li>creates 5 instances of a class which each spawns a thread which calls a function</li> <li>The Function sleeps for X milli-seconds</li> <li>prints to console</li> <li>then terminates the thread</li> </ol> <p><strong>How can I ensure all instances of the class gets a chance to finish before main cuts it off??</strong></p> <p>Most relevant help through research: <a href="https://stackoverflow.com/questions/2436142/how-do-i-pause-main-until-all-other-threads-have-died">How do I pause main() until all other threads have died?</a></p> <p>Here is my code: </p> <pre><code>Imports System Imports System.Threading Imports System.Collections.Generic Module Module1 Private raceTrack As New List(Of RaceCar) Sub Main() CreateRace() 'Main() would quit when the 5 car objects are created =[ 'How do I make sure Main will not exit until all racecars are done? End Sub Sub CreateRace() For index As Integer = 1 to 5 raceTrack.Add(new RaceCar(index)) Next End Sub Public Class RaceCar Private testThread as Thread = New Thread(AddressOf StartEngine) Private carId as Integer Public Sub New(ByVal carNumber as Integer) me.carId = carNumber Me.TestThread.Start() Me.TestThread.Join() End Sub Public Sub StartEngine() Console.WriteLine(String.Format("Car#{0} is going!", Me.carId)) Thread.Sleep(100*Me.carId) Console.WriteLine(String.Format("Car#{0} is DONE!", Me.carId)) End Sub End Class End Module </code></pre>

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