How to read and write QR code using java3 min read

Quick Response Code (QR Code) is a two-dimensional matrix like barcode, designed by a subsidiary of Toyota to mark their vehicles for tracking in their manufacturing facilities. This is nothing but a type of barcode.

The four standard modes of data for creating QR code is numeric, alphanumeric, byte / binary and Kanji. There are extensions to these standard types available, using which custom data also can be coded.

So why is it popular? QR code can store more volume of data in small area compared to the standard barcode formats. Any place where the barcodes are being used can be replace by QR codes.

Can you scan and comment on what is in this picture?

It is the link to our website, this became easily popular because of the advent of mobile apps that can be used as a QR code scanner to read the information in QR codes. You can see advertisements in newspapers having QR codes. It may contain product information, price detail, web url, etc. If you have a smartphone with iOS or Android then you can install a QR Code app easily in a minute and scan all those codes to read the information.

Some general uses of QR codes are,

  • contact information
  • calendar event
  • URL
  • GEO location
  • website authentication
  • credit card information

Java API for QR Code

ZXing (“Zebra Crossing”) is the popular API for QR code processing in Java. Its library has multiple components and we will be using the ‘core’ for QR code creation in our Java example. Following code is example to create a QR code image and read information from a QR code image.

Take your time to comment on this article.

Leave a Comment