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I am using the simple code below and as titled. How can I print simple Code39 or UPC? Even code39 of the same data prints unreadable bars that are different per data but do not scan.

cp.
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  • this code try { //bitMatrix = qrCodeWriter.encode(sku, BarcodeFormat.QR_CODE, width, height); //bitMatrix = qrCodeWriter.encode(sku, BarcodeFormat.CODE_39, width, height); bitMatrix = barcode.encode(upc, BarcodeFormat.UPC_A, width, height); } catch (WriterException ex) { Logger.getLogger(Reorder.class.getName()).log(Level.SEVERE, null, ex); } – cp. Dec 13 '17 at 19:57

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