Which IDE is best in doing JAVA CARD

I began with the JavaCard I installed the java card kit 2.2.1 and see the demo should I run the command apdutool suppose the latter is the generator apdutool script file found in the bin , jai tried to run the source command apdutool but it did not work.Please tell Which IDE is best in doing JAVA CARD
, please help me.

The card communicates with the terminal via the command / response APDU (see standard) handled directly by the mask of the card. The latter reads, writes and updates the data in the EEPROM. JavaCard approach is different : The client application sends APDU commands but still it is Applets Java on the card that treat them. Applets to when they are executed by the JCRE ( Java Card Runtime Environment or Envirronement of our executive JavaCard ) via the JavaCard API . This allows the card to adjust client applications in him charging the corresponding applet.

It contains a main package to program an applet card, utility extensions and APIs .
* Package main javacard.framework
# It defines the classes AID, APDU, Applet, ISO, PIN, JCSystem, Util
# More classes execption
* Extensions
# javacardx.framework : allows management of files according to ISO 7816-4
# javacardx.crypto : manages public and private keys , random number generation , implements the functions of encryption and hashing optimized.

LApplet card applet is a program of the JavaCard server , an applet is selected by the terminal by a selection APDU . This selection is made according to the ID of the applet must be unique (represented by the class meaning AID Applet ID) .
An applet has the following properties:
* Once it is installed in the card, it is always available
* The applet must inherit the class javacard.framework.Applet
* It must implement the methods that interact with the JCRE : install (), select ( ), deselect ()And process ( ).

The basic processing unit of an applet is an object of type javacard.framework.APDU which is transmitted by the JCRE upon receipt of a command APDU from the card ( from the terminal) . Method process ( ) the current applet is called.
Class javacard.framework.APDU :
* Is compatible with the message format ISO 7816-4
* Hide the characteristics of low-level communication protocols ( T = 0 and T = 1) .
* Encapsulates message exchanges APDUs (commands and responses ) in a buffer I / O

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