Java Barcode Code 39 Scanner Introduction
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Scanning and reading barcode Code 39 from image file is a key feature in OnBarcode
Java Barcode Scanner library.
Java Barcode Reader is completely developed in Java SDK 1.4.2, and you can easy integrate the barcode reading feature in your Java project without any registration key, activation code.
Related barcode scanner library API
Scan QR-Code in Java - Scan, Read QR Code 2d barcode images using Java.
Scan Codabar in Java - Scan, Read Codabar using Java.
Scan ISSN in Java - Scan, decode ISSN using Java.
Scan UPC-A in Java - Scan, decode UPC-A using Java.
Install Java Barcode Reader to your Java project
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- Copy BarcodeReader.jar to your Java project library folder.
- Add BarcodeReader.jar to your Java classpath.
Reading & Scanning Code 39 Barcodes in Java class
Top- tell BarcodeReader class where is the image file.
- here is the sample code:
- String[] datas = BarcodeReader.read(new File("C:/Code39-Barcode-Image.gif"), BarcodeReader.Code39);
- Pass your Code 39 barcode image file, and barcode type to BarcodeReader, and it will return all Code 39 barcode data in the image file.
Besides image file, you can also pass java.awt.Image or java.awt.image.RenderedImage object to the read method. - here is the sample code:
Common Asked Questions
What is Code 39 barcode used for?
Code 39, also known as Code 3 of 9, was the first barcode to encode both numbers and letters. It is most commonly used in
the inventory, government, military and electronics industries.
Using Java barcode reader library, you can easily read, scan and recognize Code 39 text from barcode images in Java class, desktop application, and JSP, Servlet web application.
What is the Code 39 on a barcode reader?
Code 39 is a 1d barcode symbology that encodes up to 43 characters, including uppercase letters, numbers, and special symbols.
Code 39 extension supports encoding full 128 ASCII characters.
Using Java Code 39 Barcode Scanner library, you can scan and decode all 128 ASCII characters from Code 39 standard and Code 39 extension barcode images in Java class.
How to decode Code 39 barcode?
To scan and decode Code 39 text from a barcode image, a barcode scanner device or reader software will scan all bar and space modules on the Code 39 barcode symbology,
and use a character map to translate the bar and space groups into Code 39 data characters.
OnBarcode Java Barcode Reader library will help Java developer quickly integrate Code 39 barcode scanning and decoding features in Java projects.
What is the difference between Code 39 and Code 128 barcodes?
Code 128 requires a checksum. If the Code 128 barcode is damaged, it may still be scannable. Code 39 checksum is optional.
If the Code 39 barcode without checksum is damaged, it won't be scannable.
In Java class or JSP page, you can scan, recognize and decode both Code 128 and Code 39 barcode text data from image files using Java Barcode Reader library.
