CODEWITHSUNDEEP
javaitextbarcode
Dhorrairaajj
Dhorrairaajj

Reputation: 53

Barcode128 - 3 digit String barcode width is larger than 4 digit string barcode

I have tried to generate the Barcode128 barcode to be placed on label and usually labels are less width. I am wondering that 3 digit(100) String barcode width is larger than 4 digit(1001) string barcode. 3 digit barcode should be less than the 4 digit barcode right? I have verified in online barcode generation 3 digit barcode width is less than the 4 digit barcode width where as iText api takes width more for 3 digit string compared to 4 digit string.

Could anybody please let us know the reason for this and how to make 3 digit barcode shorter than the 4 digit barcode?

Online barcode generator URL here

3 digit barcode and 4 digit barcode with iText API

Code sample used to generate the barcode.

Barcode128 code128 = new Barcode128();
    code128.setCode(myText);
    Image myBarCodeImage128 = code128.createImageWithBarcode(contentByte,
        null, null);

then image is added to pdf document.

Upvotes: 1

Views: 1374

Answers (2)

SubOptimal
SubOptimal

Reputation: 22963

Find a working snippet based on the answer from Paulo Soares.

Document document = new Document(new Rectangle(340, 842));
PdfWriter writer = PdfWriter.getInstance(document, 
    new FileOutputStream("barcodes.pdf"));
document.open();
PdfContentByte cb = writer.getDirectContent();

document.add(new Paragraph("Barcode 128 demo"));

Barcode128 code128 = new Barcode128();
code128.setCode("100");
code128.setCodeSet(Barcode128CodeSet.B);
document.add(code128.createImageWithBarcode(cb, null, null));

code128 = new Barcode128();
code128.setCode("1001");
code128.setCodeSet(Barcode128CodeSet.B);
document.add(code128.createImageWithBarcode(cb, null, null));
document.close();

Upvotes: 1

Paulo Soares
Paulo Soares

Reputation: 1916

Barcode 128 has several ways to encode digits. One of the ways is to encode 2 digits in the same symbol. In 4 digit case case you have two symbols each with two digits, two symbols in total. In the 3 digit case you have a symbol for two digits, a symbol to switch to alphanumeric and symbol for the last digit, three symbols in total. As you can see, less is more in this case.

Upvotes: 5

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