Android Question How to convert key of a Map from String to integer

You can not change the key of a Map. Create a new map with int-keys if you want.

You can convert a string to int like this

DonManfred said:

You can not change the key of a Map. Create a new map with int-keys if you want.

You can convert a string to int like this

B4X:

dim test as string = "12345" ' your string (whereever it comes from)
dim intvalue as Int = test

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Thanks DonManfred, actually i am using following code,
Dim su As StringUtils
Dim Table As List
Table = su.LoadCSV(File.DirAssets, "classdata.csv", ",")
m.Initialize
For Each row() As String In Table
Dim st As StudenType = CreateStudenType(row(0), row(1), row(2), row(3), row(4))
m.Put(st.roll, st)
here i am writing For Each row() as String In Table
therefore each type of data in the row() list should be a string, however i want to make the data for row(0) as integer, as then i can easily use it

Following @DonManfred advice, did you try the following?

Thanks udg and DonManfred. i have defined another variable as integer and it worked. Thanks.
Another thing that i want to ask is that can i put my csv file and the student pics in some external server, so that if new students are enrolled then all i need to do is to update the csv file and put a pic of the new student in the pics folder instead of recompiling the app everytime a new student is added or removed.

Why not? Having a remote DB where to store students' data will make things easier for you. Look for RDC2 for a start point on how to set up the preferred way to interact with a remote DB through a middle-layer component tha facilitates a lot this kind of projects.
If you have not available a VPS (even a low-cost one) than search for threads about using PHP along with B4A and remote DB on a shared server.