B4J Question Sort TreeViewItem

    Dim l As List = File.ListFiles(folder)
    l.Sort(True)  'Erel's hint
    Dim lreturn As List

' Parameter: The String to sort
' Returns String ASC
Sub sortMultiLineString(mls As String) As String
  If mls.Length = 0 Then Return ""
  ' Split the text
  Dim s() As String = Regex.Split(CRLF, mls)
  Dim l As List
  l.Initialize
  l.AddAll(s)
  l.sort(True)
  mls = ""
  For i = 0 To s.Length - 1
      mls = mls & l.Get(i) & CRLF
  Next
  Return mls
End Sub

Example sorting Form TextArea
Private ta As TextArea
ta.Text = sortMultiLineString(ta.Text)

private Sub getFolders(folder As String) As List
    Dim l As List = File.ListFiles(folder)
    ' SORTIEREN
    l.Sort(True)  'Erel's hint
    Dim lreturn As List
    lreturn.Initialize
    For i = 0 To l.size - 1
        Dim fName As String = l.Get(i)
        fName = sortMultiLineString(fName) ' myTry 

'        If File.IsDirectory(folder,fName) Then
        lreturn.Add(fName)
'        End If
    Next
    Return lreturn
End Sub

Dim l As List = File.ListFiles(folder)
Dim NewList As List
NewList.Initialize
For Each f As String In l
 Dim number As Int = f
 NewList.Add(number)
Next
NewList.Sort(True)
Return NewList