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    <p>I recently had to implement a scanner system to interact with java.</p> <p>I used <strong>Honeywell Voyager MS9540</strong> USB barcode scanner.</p> <p>As a default the scanner sent the data straight as keyboard input - no driver required.</p> <p><em>But</em> it was very easy to get this model to interact <strong>directly</strong> with java rather than using a keyboard hook (to use the barcodes as variables in java, as you mentioned). </p> <p>This model has a setting to emulate a serial port, you can then read the scanned data using the javax.comm package. For me, this was <em>much</em> better than a keyboard hook to get the barcode data because the program does not need the focus before being able to interpret a scan (I would not want to create a global keyboard hook).</p> <p>My java program reads all input from the specified serial port and writes the barcode to a database. I also setup the program to pass any unrecognized barcode scans to the keyboard (any barcode that my app did not create - I used a distinct signature on my barcodes) this was so it would work as a regular barcode scanner for any other apps that might read barcodes from the keyboard.</p> <p>You could probably read data directly from any USB scanner (without the serial port emulation that this model has) by doing some intensive JNDI coding but I wasn't prepared to take the time to work out the native code.</p> <p>To configure this particular model for serial port emulation all you do is scan a specific barcode in <a href="http://www.honeywellaidc.com/CatalogDocuments/00-02544%20Rev%20K%202-11.pdf"><strong>this</strong></a> document with the scanner you want to configure. It is the barcode titled "Serial Emulation Mode".</p> <p>This scanner <strong>does</strong> require a driver for serial port emulation. I found the implementation instructions and the needed drivers <a href="http://www.honeywellaidc.com/en-us/pages/Product.aspx?category=Laser&amp;cat=HSM&amp;pid=9520/40"><strong>here</strong></a> (under the "software" tab). Download the package titled: "Honeywell Scanning and Mobility (HSM) USB Serial Driver". The PDF titled "HSM USB Serial Driver Getting Started Guide" had the instructions.</p> <p>If you are not familiar with the javax.comm API. Please read the intro in <a href="http://edn.embarcadero.com/article/31915"><strong>this</strong></a> example by Rick Proctor - it tells you where to get the jar and where to put the files (javax.comm does not come standard with most java packages).</p> <p>I'm sure there are other scanner models around that have serial port emulation (I don't work for Honeywell).</p> <p>Here's a somewhat stripped down version of my barcode reader class:</p> <pre><code>package scanhandler; import java.awt.AWTException; import java.awt.Robot; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.sql.Connection; import java.util.Enumeration; import java.util.Properties; import java.util.TooManyListenersException; import javax.comm.CommPortIdentifier; import javax.comm.PortInUseException; import javax.comm.SerialPort; import javax.comm.SerialPortEvent; import javax.comm.SerialPortEventListener; import javax.comm.UnsupportedCommOperationException; public class ScanHandler implements Runnable, SerialPortEventListener { private static CommPortIdentifier myCommPortIdentifier; private static Enumeration portList; private static String TimeStamp; private static String driverClass; private static String connectionString; private static String comPort; private Connection myConnection; private InputStream myInputStream; private Robot myRobot; private SerialPort mySerialPort; private Thread myThread; public ScanHandler() { // open serial port try { TimeStamp = new java.util.Date().toString(); mySerialPort = (SerialPort) myCommPortIdentifier.open("ComControl", 2000); //System.out.println(TimeStamp + ": " + myCommPortIdentifier.getName() + " opened for scanner input"); } catch (PortInUseException e) { e.printStackTrace(); } // get serial input stream try { myInputStream = mySerialPort.getInputStream(); } catch (IOException e) { e.printStackTrace(); } // add an event listener on the port try { mySerialPort.addEventListener(this); } catch (TooManyListenersException e) { e.printStackTrace(); } mySerialPort.notifyOnDataAvailable(true); // set up the serial port properties try { mySerialPort.setSerialPortParams(9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE); mySerialPort.setDTR(false); mySerialPort.setRTS(false); } catch (UnsupportedCommOperationException e) { e.printStackTrace(); } // make a robot to pass keyboard data try { myRobot = new Robot(); } catch (AWTException e) { e.printStackTrace(); } // create the thread myThread = new Thread(this); myThread.start(); } public void run() { try { Thread.sleep(100); } catch (InterruptedException e) {} } // on scan public void serialEvent(SerialPortEvent event) { if (event.getEventType() == SerialPortEvent.DATA_AVAILABLE) { StringBuilder myStringBuilder = new StringBuilder(); int c; try { // append the scanned data onto a string builder while ((c = myInputStream.read()) != 10){ if (c != 13) myStringBuilder.append((char) c); } // send to keyboard buffer if it the barcode doesn't start with '5' if (myStringBuilder.charAt(0) != '5') { for (int i = 0; i &lt; myStringBuilder.length(); i++) { myRobot.keyPress((int) myStringBuilder.charAt(i)); myRobot.keyRelease((int) myStringBuilder.charAt(i)); } // here's the scanned barcode as a variable! } else { TimeStamp = new java.util.Date().toString(); System.out.println(TimeStamp + ": scanned input received:" + myStringBuilder.toString()); } // close the input stream myInputStream.close(); } catch (IOException e) { e.printStackTrace(); } } } public static void main(String[] args) { // read ScanHandler properties Properties myProperties = new Properties(); try { myProperties.load(new FileInputStream("config.properties")); comPort = myProperties.getProperty("ScanHandler.comPort"); } catch (IOException e) { e.printStackTrace(); } try { // get our pre-defined COM port myCommPortIdentifier = CommPortIdentifier.getPortIdentifier(comPort); ScanHandler reader = new ScanHandler(); } catch (Exception e) { TimeStamp = new java.util.Date().toString(); System.out.println(TimeStamp + ": " + comPort + " " + myCommPortIdentifier); System.out.println(TimeStamp + ": msg1 - " + e); } }; } </code></pre>
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    1. COIt looks like those drivers are only for Windows, so you won't be able to use your program on other operating systems than Windows if you do it this way.
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    2. COMay be right, I only needed this for windows. I haven't searched deeply but there should be something that will convert a USB to COM port for Linux or MAC
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