I have an application written on Java running on the machine (Linux/Windows). I want to make this application run like a background application so that it does not interrupt while using other applications in the system. Now I want to popup a screen and show some buttons (to do some tasks based on the selection) when a QR Code is scanned using a scanned attached to the USB port. When this scanning happens my Java application that initiates the popup screen is running hidden in the background.
--Edit--
I have used key listeners to identify the bar code scanning and pull out information from database based on what is scanned. But while scanning my application, was open. So I attached the action listeners in the AWT level so that the key strokes/scanning is caught and taken care off. But now in the current case I wont be having any windows active. SO I NEED TO CAPTURE THE SCANNED INPUT INTERNALLY IN OS LEVEL.
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