Java 到 VB.net 拆分字符串上的 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

运行程序时出现 NullReferenceException 拆分字符串错误。 抱歉，新来的。我正在解析一个数组并尝试将值打印到列表框。原始代码是用 Java 编写的，在使用转换器将其添加到我的 vb.net 代码中后，我收到了此 null 异常。

Error Message

Answer 1

试试这个:

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