分裂字符串上的Java到VB.net NullReferenceException

Question

Public Overridable Sub printMatrix()
    administrator.ListBox1.Items.Add(ControlChars.Lf)
    For i As Integer = 1 To matrix.Length - 1
        For j As Integer = 1 To matrix.Length - 1
            Dim parser() As String = matrix(i)(j).Split(New Char() {" "c})
            ' Dim parser() As String = matrix(i)(j).Split(" ", True)
            For k As Integer = 0 To parser.Length - 1
                If Regex.IsMatch(parser(k), "[a-zA-Z ]*\d+.*") Then
                    Console.Write(Double.Parse(parser(k)) & " ")
                End If
                'If parser(k).matches("[a-zA-Z ]*\d+.*") Then
                '    Console.Write(Double.Parse(parser(k)) & " ")
                'End If
            Next k
            administrator.ListBox1.Items.Add("|" & ControlChars.Tab)
        Next j
        administrator.ListBox1.Items.Add(ControlChars.Lf)
    Next i
End Sub

Getting a NullReferenceException on Split String error when running program. Sorry, new here. I'm parsing through an array and trying to print the values to a listbox . The original code was written in Java and after using a converter to add it to my vb.net code I'm getting this null exception.

Error Message

Answer 1

尝试这个：

 Dim parser As new String() = matrix(i)(j).Split(New Char() {" "c})