B4J Question TableView - find row index

Sub Process_Globals
 Private fx As JFX
 Private MainForm As Form
 Dim tv As TableView
 Dim index As List
 Dim tf As TextField
 Dim lab As Label
End Sub
Sub AppStart (Form1 As Form, Args() As String)
 MainForm = Form1
 MainForm.Show
 tv.Initialize("tv")
 tv.SetColumns(Array("one","two","three"))
 tv.setColumnWidth(0,100)
 tv.setColumnWidth(1,100)
 tv.setColumnWidth(2,100)
 MainForm.RootPane.AddNode(tv,0,0,300,300)
 For a = 0 To 100
 tv.Items.Add(Array(a,"dummy","dummy#"&a))
 Next
 tf.Initialize("tf") ' for the search item
 MainForm.RootPane.AddNode(tf,400,0,100,20)
 lab.Initialize("")
 MainForm.RootPane.AddNode(lab,400,50,100,20)
 buildIndexOn(2) ' build index on col 2
End Sub
Sub buildIndexOn(col As Int)
 index.Initialize
 For Each item() As Object In tv.Items
 index.Add(item(col)) 
 Next
End Sub
Sub tf_Action
 If index.IndexOf(tf.Text) <> -1 Then
 tv.ScrollTo(index.IndexOf(tf.Text))
 lab.Text = "Found"
 Else
 lab.Text = "Not found" 
 End If
End Sub

For Each item() As Object In tv.Items
index.Add(item(col))
Next

For Each item() As Object In tv.Items
dim myInt as integer = item(col)
index.Add(myInt)
Next

For Each item() As Object In tv.Items
   Dim myLabel as Label = item(col)
   index.Add(myLabel.Text)
Next