IT. Expert System.

public class EllipticCurve
extends Object

• Constructor Summary

  Constructors

  Constructor and Description
  EllipticCurve(ECField field, BigInteger a, BigInteger b) Creates a new EllipticCurve with the specified field and coefficients.
  EllipticCurve(ECField field, BigInteger a, BigInteger b, byte[] seed) Creates a new EllipticCurve with the specified field, coefficients and seed.

• Method Summary

  Methods

  Modifier and Type	Method and Description
  boolean	equals(Object other) Returns whether the specified object equals to this elliptic curve.
  BigInteger	getA() Returns the coefficient a of this elliptic curve.
  BigInteger	getB() Returns the coefficient b of this elliptic curve.
  ECField	getField() Returns the finite field of this elliptic curve.
  byte[]	getSeed() Returns a copy of the seed that was used to generate this elliptic curve.
  int	hashCode() Returns the hashcode of this elliptic curve.

  • Methods inherited from class java.lang.Object

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

• Constructor Detail

  • EllipticCurve

    public EllipticCurve(ECField field,
                 BigInteger a,
                 BigInteger b,
                 byte[] seed)

    Creates a new EllipticCurve with the specified field, coefficients and seed.

    Parameters:

    field - the finite field of this elliptic curve.

    a - the coefficient a.

    b - the coefficient b.

    seed - the seed used for the generation of the curve.

    Throws:

    IllegalArgumentException - if the specified coefficients are not in the specified field.

  • EllipticCurve

    public EllipticCurve(ECField field,
                 BigInteger a,
                 BigInteger b)

    Creates a new EllipticCurve with the specified field and coefficients.

    Parameters:

    field - the finite field of this elliptic curve.

    a - the coefficient a.

    b - the coefficient b.

    Throws:

    IllegalArgumentException - if the specified coefficients are not in the specified field.

• Method Detail

  • getA

    public BigInteger getA()

    Returns the coefficient a of this elliptic curve.

    Returns:

    the coefficient a of this elliptic curve.

  • getB

    public BigInteger getB()

    Returns the coefficient b of this elliptic curve.

    Returns:

    the coefficient b of this elliptic curve.

  • getField

    public ECField getField()

    Returns the finite field of this elliptic curve.

    Returns:

    the finite field of this elliptic curve.

  • getSeed

    public byte[] getSeed()

    Returns a copy of the seed that was used to generate this elliptic curve.

    Returns:

    a copy of the seed that was used to generate this elliptic curve, or null if none specified.

  • equals

    public boolean equals(Object other)

    Returns whether the specified object equals to this elliptic curve.

    Overrides:

    equals in class Object

    Parameters:

    other - the object to compare.

    Returns:

    true if the specified object is equal to this elliptic curve, otherwise false.

    See Also:

    Object.hashCode()

  • hashCode

    public int hashCode()

    Returns the hashcode of this elliptic curve.

    Overrides:

    hashCode in class Object

    Returns:

    the hashcode of this elliptic curve.

    See Also:

    Object.equals(java.lang.Object)