Android Question string array to int array

I'm sorry
It has posted using the translation software so I can not speak English
I do not know how to convert to int array from a string array
I want to know is the way!

This code, the following error will appear
java.lang.NumberFormatException: Invalid double: ""



Sub test

Dim text As String
Dim b(100) As Int
Dim a(100) As String

text = "_ABC_DEF_GHI_JKL_MNO ････････････････････"

a =Regex.Split("_",text)

For i = 0 To a.Length -1
b(i) = a(i)
Next
End Sub