Do you need a scanner that makes the keyboard inout? cCOMM scanner (rS232) a USB scanner that does not perform keybaord input
Most barcodes are read by a Simpel keyboard barcode. This works without Java programming, since it is your barcodescanner that simply sends keybaord events to your application. just put focus in the text box, scan and it works.
Other parameters are COMM communication
http://java.sun.com/products/javacomm/
http://www.jcontrol.org/download/rxtx_en.html
USB- , COMM
, USB, , COMM