Establishes a connection to the card.

  Establishes a connection to the card.
If a connection has previously established using
the specified protocol, this method returns the same Card object as
the previous call.
Parameters:
- protocol - the protocol to use ("T=0", "T=1", or "T=CL"), or "*" to connect using any available protocol.
Throws:
- NullPointerException - if protocol is null
- IllegalArgumentException - if protocol is an invalid protocol specification
- CardNotPresentException - if no card is present in this terminal
- CardException - if a connection could not be established using the specified protocol or if a connection has previously been established using a different protocol
- SecurityException - if a SecurityManager exists and the caller does not have the required {@linkplain CardPermission permission}

  Returns the unique name of this terminal.

  Returns the unique name of this terminal.
Returns: the unique name of this terminal.

  Returns whether a card is present in this terminal.

  Returns whether a card is present in this terminal.
Returns: whether a card is present in this terminal.
Throws:
- CardException - if the status could not be determined

  Waits until a card is absent in this terminal or the timeout expires.

  Waits until a card is absent in this terminal or the timeout expires. If the method returns due to an expired timeout, it returns false. Otherwise it return true.

If no card is present in this terminal when this method is called, it returns immediately.
Returns: false if the method returns due to an expired timeout, true otherwise.
Parameters:
- timeout - if positive, block for up to timeout milliseconds; if zero, block indefinitely; must not be negative
Throws:
- IllegalArgumentException - if timeout is negative
- CardException - if the operation failed

  Waits until a card is present in this terminal or the timeout expires.

  Waits until a card is present in this terminal or the timeout expires. If the method returns due to an expired timeout, it returns false. Otherwise it return true.

If a card is present in this terminal when this method is called, it returns immediately.
Returns: false if the method returns due to an expired timeout, true otherwise.
Parameters:
- timeout - if positive, block for up to timeout milliseconds; if zero, block indefinitely; must not be negative
Throws:
- IllegalArgumentException - if timeout is negative
- CardException - if the operation failed