Decoding byte[] to string[][]

Question

I am storing a string[][]-array into a database as a "blob". Loading the data, I initially get a byte[]-array, which I then need to decode to string[][] again.

So: Can anywone tell me if there is a way to convert a byte[]-array to a string[][]-array (on Android)? Or if there is a way to convert a byte[]-array to an ArrayList ?

I asked a similar question once, but the question was referring to blobs.

What does it mean to convert a 1D array to a 2D array, let alone 2D array of String? What's the conversion rule? It normally makes sense to talk about decoding a byte[] to a String. This seems off by two whole dimensions! — Sean Owen
– Sean Owen, Commented Jul 24, 2011 at 18:11
Well, I am storing a string[][]-array to a database as a "blob". Loading the data, I initially get a byte-array, which I then need to decode to a string[][]-array. — deimos1988
– deimos1988, Commented Jul 24, 2011 at 18:14
"I am storing". Can you clearify? What magic is applied to make your string[][] a blob (byte[]) in DB? — Sebastian J.
– Sebastian J., Commented Jul 24, 2011 at 18:24
I simply stored the string[][]-array "as is" with "INSERT INTO..." into a column with "blob" as datatype. — deimos1988
– deimos1988, Commented Jul 24, 2011 at 18:35

Jon Skeet · Accepted Answer · 2011-07-24 16:51:19Z

3

You would normally convert a byte array to a single blob - why would you want an array of blobs? Would you want a single blob per byte? That sounds unlikely.

Creating a single blob for an array of bytes is easy though... for example, with a PreparedStatement:

statement.setBlob(parameterIndex, bytes);

answered Jul 24, 2011 at 16:51

Jon Skeet

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15 Comments

deimos1988 Over a year ago

Thank you for your answer, please see my edited initial post which now specifies what I want to achieve by this conversion.

Jon Skeet Over a year ago

@deimos: Now your title talks about converting byte arrays to blobs, while your question talks about converting blobs to strings. Which is it?

deimos1988 Over a year ago

Eventually I need to convert a byte[]-array to a string[][]-array. To do this the way presented in my initial post, I would need a blob-array, not a byte-array. So if either one of the questions is answered, it would help me a lot.

Jon Skeet Over a year ago

@deimos1988: It's not clear why you need to get a blob involved at all. Do you just need to convert byte arrays into strings? If so, please edit your question to reflect that.

deimos1988 Over a year ago

I changed the title to what I eventually need. If you know how to accomplish that, I would be very grateful.

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