Can we test java card application on 2 simulators simultaneously?

to create a java card applet we also need to write card reader code to select that applet from card.but can we test it using simulators.how can 2 simulators (1 for card applet and other for reader) run simultaneously?

Hi,
to create a java card applet we also need to write card reader code to select that applet from card.but can we test it using simulators.how can 2 simulators (1 for card applet and other for reader) run simultaneously?Do you intend to have both simulators talking to each other or is the intent to code a host application that communicates with both cards at the same time?
If you are using CREF, you can start the second instance on a different port. You would then configure your host application to look for cards on both ports.
Cheers,
Shane

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you mean by again doing right click src then New-other-java card Applet.

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Hi all,
Am new to java card applet development. I have developed a sample applet. But i don't know how to test it. So can anyone help me understand this.
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Hi,
To test your application you need to install it on a Java Card virtual machine. This can either be on a real smartcard or in an emulator (such as the ones in the JCDK). When you have it installed you can then send APDU commands to exercise the applet. From memory, there is an example of how to use the CREF simulator in the JCDK Developer Guide that is a part of the package.
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Hello all,
currently i dont have any real java card yet,not either reader . I already made a simple applet and check its working by CJCRE (net beans simulator), it is working fine,
now i want to move to host application which will communicate with java card via card reader. Is this possible to simulate complete application ( host application + java card applets)?
I want to check it out that:- which line of java program would be helpful to know that:-
1-"how real host application will talk to reader"
2- how it connect and disconnect the reader
3- how it send apdu to java card by reader
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you mean to say this
http://askra.de/software/jcdocs/app-notes-2.2.2/apduio.html
I am quite confused now, i read this but still can not imagine the concept ,
an applet code is :-
public class GetName extends Applet
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     final static byte INS_READ = (byte) 0x02; // instruction for the READ APDU command
     final static byte INS_WRITE = (byte) 0x03; // instruction for the READ APDU command
     final static byte INS_DY_CO = (byte) 0x04; // instruction for the READ APDU command
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     public static byte[] holder;
     public static void install(byte[] bArray, short bOffset, byte bLength)
        new GetName();
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        holder = new byte[5];// allocation of memory in runtime
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         if (cmd_apdu[ISO7816.OFFSET_CLA] == CLASS)
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                    if ((cmd_apdu[ISO7816.OFFSET_P1] != 0) || (cmd_apdu[ISO7816.OFFSET_P2] != 0))
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                    short le = (short)(cmd_apdu[ISO7816.OFFSET_LC] & 0x00FF);
                    short len_text = (short)text.length;
                    if (le != len_text)
                    ISOException.throwIt((short)(ISO7816.SW_CORRECT_LENGTH_00 + len_text));
                    apdu.setOutgoing();
                    apdu.setOutgoingLength((short)len_text);
                    apdu.sendBytesLong(text, (short)0, (short)len_text);
                    break;
                // here we save data from apdu and will keep inside the data byte
                    case INS_WRITE:
                short lc = (short)(cmd_apdu[ISO7816.OFFSET_LC] & 0x00FF);
                Util.arrayCopy(cmd_apdu, (short) ((ISO7816.OFFSET_CDATA) & 0xff), holder, (short) 0, lc);
                    short len_holder_inside_write= (short) holder.length;
                   apdu.setOutgoing();
                apdu.setOutgoingLength((short)len_holder_inside_write);
                apdu.sendBytesLong(holder, (short) 0, (short) len_holder_inside_write);
                break;
                case INS_DY_CO:
                    short len_holder= (short) holder.length;
                apdu.setOutgoing();
                apdu.setOutgoingLength((short)len_holder);
                apdu.sendBytesLong(holder, (short) 0, (short) len_holder);
                break;
                    default :
                    ISOException.throwIt(ISO7816.SW_INS_NOT_SUPPORTED);
         else
                ISOException.throwIt(ISO7816.SW_CLA_NOT_SUPPORTED);
}now i think i need to make a another java file which would contain a main class, Is this both file would be inside a single java card project. and how these both would be connect to each other.
for manually run a applet- there were two steps 1-
C:\java_card_kit-2_2\samples\src\demo>jcwde jcwde-getname.app
Java Card 2.2 Workstation Development Environment (version 0.18).
Copyright 2002 Sun Microsystems, Inc. All rights reserved.
jcwde is listening for T=0 Apdu's on TCP/IP port 9,025.
and in second terminal we wrote-
C:\java_card_kit-2_2\samples\src\demo>apdutool -nobanner -noatr getname.scr > ge
tname.scr.jcwde.out
Here it is clear that, if i will use javacardio then no need to pass the apdu from a file .....but i am confuse about how it possible, ie. is both file lie in same project , because i m using simulator so i need to run these both file simoltaneously........give me some roughly steps to implement this.

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