public class ECPoint extends Object
This immutable class represents a point on an elliptic curve (EC) in affine coordinates. Other coordinate systems can extend this class to represent this point in other coordinates.
public static final ECPoint POINT_INFINITY
This defines the point at infinity.
public ECPoint(BigInteger x, BigInteger y)
Creates an ECPoint from the specified affine x-coordinate x
and affine y-coordinate y
.
x
- the affine x-coordinate.y
- the affine y-coordinate.NullPointerException
- if x
or y
is null.public BigInteger getAffineX()
Returns the affine x-coordinate x
. Note: POINT_INFINITY has a null affine x-coordinate.
public BigInteger getAffineY()
Returns the affine y-coordinate y
. Note: POINT_INFINITY has a null affine y-coordinate.
public boolean equals(Object obj)
Compares this elliptic curve point for equality with the specified object.
equals
in class Object
obj
- the object to be compared.obj
is an instance of ECPoint and the affine coordinates match, false otherwise.Object.hashCode()
, HashMap
public int hashCode()
Returns a hash code value for this elliptic curve point.
hashCode
in class Object
Object.equals(java.lang.Object)
, System.identityHashCode(java.lang.Object)
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