Class ECParameterSpec
 java.lang.Object

 java.security.spec.ECParameterSpec
 All Implemented Interfaces:
AlgorithmParameterSpec
public class ECParameterSpec extends Object implements AlgorithmParameterSpec
This immutable class specifies the set of domain parameters used with elliptic curve cryptography (ECC).
 Since:
 1.5
 See Also:
AlgorithmParameterSpec
Constructor Summary
Constructor  Description 

ECParameterSpec(EllipticCurve curve,
ECPoint g,
BigInteger n,
int h)  Creates elliptic curve domain parameters based on the specified values. 
Method Summary
Modifier and Type  Method  Description 

int  getCofactor()  Returns the cofactor. 
EllipticCurve  getCurve()  Returns the elliptic curve that this parameter defines. 
ECPoint  getGenerator()  Returns the generator which is also known as the base point. 
BigInteger  getOrder()  Returns the order of the generator. 
Methods declared in class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Constructor Detail
ECParameterSpec
public ECParameterSpec(EllipticCurve curve, ECPoint g, BigInteger n, int h)
Creates elliptic curve domain parameters based on the specified values.
 Parameters:

curve
 the elliptic curve which this parameter defines. 
g
 the generator which is also known as the base point. 
n
 the order of the generatorg
. 
h
 the cofactor.  Throws:

NullPointerException
 ifcurve
,g
, orn
is null. 
IllegalArgumentException
 ifn
orh
is not positive.
Method Detail
getCurve
public EllipticCurve getCurve()
Returns the elliptic curve that this parameter defines.
 Returns:
 the elliptic curve that this parameter defines.
getGenerator
public ECPoint getGenerator()
Returns the generator which is also known as the base point.
 Returns:
 the generator which is also known as the base point.
getOrder
public BigInteger getOrder()
Returns the order of the generator.
 Returns:
 the order of the generator.
getCofactor
public int getCofactor()
Returns the cofactor.
 Returns:
 the cofactor.