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)