Java™ Smart Card I/O API

 

Java™ Smart Card I/O API

This specification describes the Java Smart Card I/O API defined by JSR 268. It defines a Java API for communication with Smart Cards using ISO/IEC 7816-4 APDUs. It thereby allows Java applications to interact with applications running on the Smart Card, to store and retrieve data on the card, etc.

The API is defined by classes in the package javax.smartcardio. They can be classified as follows:

Classes describing the corresponding Smart Card structures

ATR, CommandAPDU, ResponseAPDU

Factory to obtain implementations

TerminalFactory

Main classes for card and terminal functions

CardTerminals, CardTerminal, Card, CardChannel

Supporting permission and exception classes

CardPermission, CardException, CardNotPresentException

Service provider interface, not accessed directly by applications

TerminalFactorySpi

API Example

A simple example of using the API is:

        // show the list of available terminals
        TerminalFactory factory = TerminalFactory.getDefault();
        List<CardTerminal> terminals = factory.terminals().list();
        System.out.println("Terminals: " + terminals);
        // get the first terminal
        CardTerminal terminal = terminals.get(0);
        // establish a connection with the card
        Card card = terminal.connect("T=0");
        System.out.println("card: " + card);
        CardChannel channel = card.getBasicChannel();
        ResponseAPDU r = channel.transmit(new CommandAPDU(c1));
        System.out.println("response: " + toString(r.getBytes()));
        // disconnect
        card.disconnect(false);