help me with validation Barcode 128

zaratustra

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Nov 18, 2010, 6:15:15 AM11/18/10

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Hi, I would like someone to help me, and I need to do a function in
Java to verify that a barcode 128 is correct, anyone can show me this
code? thanks and sorry for my english

zaratustra

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Nov 19, 2010, 7:23:32 AM11/19/10

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nothing know the code to validate a barcode 128??? I don't know the
rules applied to validate... help!

Sean Owen

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Nov 19, 2010, 8:07:10 AM11/19/10

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What do you mean by 'validate'? The Code 128 format includes a
checksum mechanism, which you can learn about by searching the
internet. The decoder implements a checksum verification.

zaratustra

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Nov 19, 2010, 8:25:20 AM11/19/10

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I mean is if I write a string of alphanumeric characters, you can
check if the string is a valid barcode 128, do you understand? I want
this checksum/function...

Bas Vijfwinkel

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Nov 19, 2010, 9:24:48 AM11/19/10

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The checksum routine is already present in the zxing library.
If the checksum fails, the zxing library will not return a positive
result or suggest that the checksum is wrong.

But take a look at this site for a detailed explanation how the
checksum is being calculated :
http://www.adams1.com/128code.html
This should be enough information to write the routine.
If not, let us know.

zaratustra

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Nov 22, 2010, 4:11:45 AM11/22/10

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Thank you very much. One last thing, do you know which file to library
ZXing where is the barcode checksum routine for the barcode 128?

Sean Owen

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Nov 22, 2010, 6:12:02 AM11/22/10

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Code128Reader.java -- I think you would have benefitted from searching
the code first.

zaratustra

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Nov 22, 2010, 7:46:19 AM11/22/10

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Sorry, you are right, thanks

vidya jejurkar

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May 10, 2017, 4:28:48 AM5/10/17

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@zaratustra: Did u get solution??

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