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java.security.spec
Class ECFieldFp

java.lang.Object
  extended by java.security.spec.ECFieldFp
All Implemented Interfaces:
ECField

public class ECFieldFp
extends Object
implements ECField

This immutable class defines an elliptic curve (EC) prime finite field.

Since:
1.5
See Also:
ECField

Constructor Summary
ECFieldFp(BigInteger p)
          Creates an elliptic curve prime finite field with the specified prime p.
 
Method Summary
 boolean equals(Object obj)
          Compares this prime finite field for equality with the specified object.
 int getFieldSize()
          Returns the field size in bits which is size of prime p for this prime finite field.
 BigInteger getP()
          Returns the prime p of this prime finite field.
 int hashCode()
          Returns a hash code value for this prime finite field.
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

ECFieldFp

public ECFieldFp(BigInteger p)
Creates an elliptic curve prime finite field with the specified prime p.

Parameters:
p - the prime.
Throws:
NullPointerException - if p is null.
IllegalArgumentException - if p is not positive.
Method Detail

getFieldSize

public int getFieldSize()
Returns the field size in bits which is size of prime p for this prime finite field.

Specified by:
getFieldSize in interface ECField
Returns:
the field size in bits.

getP

public BigInteger getP()
Returns the prime p of this prime finite field.

Returns:
the prime.

equals

public boolean equals(Object obj)
Compares this prime finite field for equality with the specified object.

Overrides:
equals in class Object
Parameters:
obj - the object to be compared.
Returns:
true if obj is an instance of ECFieldFp and the prime value match, false otherwise.

hashCode

public int hashCode()
Returns a hash code value for this prime finite field.

Overrides:
hashCode in class Object
Returns:
a hash code value.

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