Class ATR

All Implemented Interfaces:
Serializable
public final class ATR
extends Object
implements Serializable

A Smart Card's answer-to-reset bytes. A Card's ATR object can be obtained by calling Card.getATR(). This class does not attempt to verify that the ATR encodes a semantically valid structure.

Instances of this class are immutable. Where data is passed in or out via byte arrays, defensive cloning is performed.

Since:
1.6
See Also:
Card.getATR(), Serialized Form

Constructors

Constructor Description
ATR​(byte[] atr)

Constructs an ATR from a byte array.

Methods

Modifier and Type Method Description
boolean equals​(Object obj)

Compares the specified object with this ATR for equality.
byte[] getBytes()

Returns a copy of the bytes in this ATR.
byte[] getHistoricalBytes()

Returns a copy of the historical bytes in this ATR.
int hashCode()

Returns the hash code value for this ATR.
String toString()

Returns a string representation of this ATR.

Methods declared in class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructors

ATR

public ATR(byte[] atr)

Constructs an ATR from a byte array.

Parameters:
atr - the byte array containing the answer-to-reset bytes
Throws:
NullPointerException - if atr is null

Methods

getBytes

public byte[] getBytes()

Returns a copy of the bytes in this ATR.

Returns:
a copy of the bytes in this ATR.

getHistoricalBytes

public byte[] getHistoricalBytes()

Returns a copy of the historical bytes in this ATR. If this ATR does not contain historical bytes, an array of length zero is returned.

Returns:
a copy of the historical bytes in this ATR.

toString

public String toString()

Returns a string representation of this ATR.

Overrides:
toString in class Object
Returns:
a String representation of this ATR.

equals

public boolean equals(Object obj)

Compares the specified object with this ATR for equality. Returns true if the given object is also an ATR and its bytes are identical to the bytes in this ATR.

Overrides:
equals in class Object
Parameters:
obj - the object to be compared for equality with this ATR
Returns:
true if the specified object is equal to this ATR
See Also:
Object.hashCode(), HashMap

hashCode

public int hashCode()

Returns the hash code value for this ATR.

Overrides:
hashCode in class Object
Returns:
the hash code value for this ATR.
See Also:
Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/11/docs/api/java.smartcardio/javax/smartcardio/ATR.html