Magnetic card reader and java

hi all
I am doing a project in java in which i need to read the magnetic card reader in my program.so please tell me how to read the text ,that the card reads, in java.Basically my project is to develop an attendence system in java that will use ATM card of the person.I need to read the string that the reader reads, in java.Please help me how to do this.Thanks in eadvanc

Alright,let me give you an idea of what stratergies which we can follow with regards to your requirement assuming that the magenetic card contains just a stream of information.
1).If you are using Magnectic card Over Serial / LPT ports,Try to use Java Communication Api.
write a class using it which pools all the available initiated ports continuosly.If you find ready data avalable with regards to that device connect to that port & then fetch the data and then throgh an event with regards to that data obtained now parse the data accordingly and then use for your business means.
http://java.sun.com/products/javacomm/
http://www.javaworld.com/javaworld/jw-05-1998/jw-05-javadev.html
http://java.sun.com/developer/Books/javaprogramming/cookbook/11.pdf
the above links would guide you through in acheiving the stated solution.
2). If the stated Magenetic Card or Specified device already has a Driver in place and set of native methods(in low level languages) in place.all you ought to do is to make use of JNI and write a native Linking library using JNI specification which can make use of those native methods and export them to java and use them accordingly.
http://java.sun.com/j2se/1.5.0/docs/guide/jni/spec/jniTOC.html
http://www.javaworld.com/javaworld/jw-10-1999/jw-10-jni.html
http://www.ibm.com/developerworks/edu/j-dw-javajni-i.html
Hope the might help you in taking you through :)
REGARDS,
RaHuL

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