What about ISO/IEC-7816 file structure, Is this concept is not in jcard.

Question

Hello all,
I read out ISO/IEC 7816-4 and it tell about MF , DF, EF files which are used in smart card, i am using java card.
I am reading java card but i did not read about these file structure,
according to iso/iec-7816-4 , A4 is a INS for SELECT FILE command. In scosta if i want to save name in smart card then i do
*1*- create MF
*2*-create Df ( INS- E0)
*3*- create ef with record oriented structure(INS-E0)
*4* run write record command (*INS-D2*)
and now i can read this name whenever i want by using read record command.
I only want to know that if i want to record several names in java card (in java card eeprom ) then which line i need to write inside the PROCESS () method of applet.
-----------how i permanent save in smart card memory?
-----------how i read the data from perticular location or the location where name exist?
Thanks in advance..............
Edited by: rohit pathak on Feb 9, 2012 10:41 PM
Edited by: rohit pathak on Feb 9, 2012 10:42 PM

Answer 1

if (selectingApplet())
               return;
// this method  is use to make a difference between select applet
//apdu { have to call it before any apdu pass to card, this apdu is isolate to process method }
//and other apdu { here class and INS is for your choice,
// it depends how u implement it in process().amazing Umer, atleast for me really it's gr8 to have you here..
you know i am a beginner so it is sure that there would be a no. of question in my mind now!!!!!and I want to share with you for your answer as well try to get it by my own, u already help me a lot , and i would
be always thankful for this. I am posting some questions here, if you feel it is genuine question , pls reply and if
you think i am bothering you to ask such a foolish question , u dont!!!!
QUESTION -1
As I know about architecture of any application is -
                //normal java software                          java card                                  java card
                  //  1                                               2                                      3
1-            application program                        host application                           host application
2-                     JVM                                   Applets                                       Applets
3-              operating system                JCRE(which contain all classes, JVM ....)                 JCRE(act as a O.S too)
4                    hardware                              Operating system                                 H/W
5                                                                        hardwareWhat do u think- case 2 is right? or 3 is!!!!!!!!!!!
I think - case 3 is right!!!!
As i study from several sources , JCRE is complete package - it behaves as a operation system and use the functionality of component it contain. I also think if i will purchase a java card from any vendor , it would have JCRE inside it (means everthing inside it,), i only need to develop the applet according to my requirement and install it by on card installer program
QUESTION 2- what is the advantage of java card.?
// I think.
as i read out , i got the line that it is platform independent and support multiple application. applicaton point of
view , I am agree but how it is platfrom independent. if we use java card for smart card development, then
i will purchase Java card from differnt vendor , all will provide me card with supported jcre inside it, so why
this is advantage here?
// in case of window based application , it really make sense  because if i will make any window application with java
// i can run it in windows , linux , unix and most of os flavours, here i can see the beauty of java language.
Clear me this and add some other java card advantages, which make java card goodquestion 3-
Now I am capaple to make simple applets, so I want to check the entire java card process atleast once before
going in deep of something, I am thinking to implement prepaid card concept , i made it applet for it ,it will
contain a page with 2 text box ( 1- for recharge 2- for money deduction ) and two button , with button click i
want to select the applet and want to pass the apdu.
( a) how i can make host window application ? (i think awt will work for me? , *
i never make any java window application yet) *
( b) still i dont have any java card , i want to make it by using simulator, is it possible?
  (c) in this scenario what framework i need to study Ex. Import javacard.framework.* for making
applet or from where i need to start.regards:
rohit pathak
Edited by: rohit pathak on Feb 9, 2012 10:39 PM