Hello,

I am new in writing JavaCard.  I have modified a Java
application (OPPurse) given by Gemplus.  It works even
I did not download any Java Communication package,
i.e. no comm.jar. 

Now, I am writing with Swing.  I put in similar codes
and it did not work.  I discovered later that I have
to install the Java Communication package and it now
works.

Could anyone tell me why that there is no need to use
the communication package for Java application?  I
don't know why it needn't, as it still needs to use a
serial port for the smart card reader.

Thanks for your attention.

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