public class ECPoint
extends Object 

Since:

1.5

• Field Summary

  Fields

  Modifier and Type	Field	Description
  static ECPoint	POINT_INFINITY	This defines the point at infinity.

• Constructor Summary

  Constructors

  Constructor	Description
  ECPoint (BigInteger x, BigInteger y)	Creates an ECPoint from the specified affine x-coordinate x and affine y-coordinate y.

• Method Summary

  All Methods

  Modifier and Type	Method	Description
  boolean	equals (Object obj)	Compares this elliptic curve point for equality with the specified object.
  BigInteger	getAffineX ()	Returns the affine x-coordinate x.
  BigInteger	getAffineY ()	Returns the affine y-coordinate y.
  int	hashCode ()	Returns a hash code value for this elliptic curve point.

  • Methods inherited from class java.lang.Object

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

• Field Detail

  • POINT_INFINITY

    public static final ECPoint POINT_INFINITY

    This defines the point at infinity.

• Constructor Detail

  • ECPoint

    public ECPoint(BigInteger x,
     BigInteger y)

    Creates an ECPoint from the specified affine x-coordinate x and affine y-coordinate y.

    Parameters:

    x - the affine x-coordinate.

    y - the affine y-coordinate.

    Throws:

    NullPointerException - if x or y is null.

• Method Detail

  • getAffineX

    public BigInteger getAffineX()

    Returns the affine x-coordinate x. Note: POINT_INFINITY has a null affine x-coordinate.

    Returns:

    the affine x-coordinate.

  • getAffineY

    public BigInteger getAffineY()

    Returns the affine y-coordinate y. Note: POINT_INFINITY has a null affine y-coordinate.

    Returns:

    the affine y-coordinate.

  • equals

    public boolean equals(Object obj)

    Compares this elliptic curve point 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 ECPoint and the affine coordinates match, false otherwise.

    See Also:

    Object.hashCode(), HashMap

  • hashCode

    public int hashCode()

    Returns a hash code value for this elliptic curve point.

    Overrides:

    hashCode in class Object

    Returns:

    a hash code value.

    See Also:

    Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)