ECPoint

public class ECPoint
extends Object

java.lang.Object
   ↳ java.security.spec.ECPoint


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.

Summary

Fields

public static final ECPoint POINT_INFINITY

This defines the point at infinity.

Public constructors

ECPoint(BigInteger x, BigInteger y)

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

Public methods

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.

Inherited methods

Object clone()

Creates and returns a copy of this object.

boolean equals(Object obj)

Indicates whether some other object is "equal to" this one.

void finalize()

Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.

final Class<?> getClass()

Returns the runtime class of this Object.

int hashCode()

Returns a hash code value for the object.

final void notify()

Wakes up a single thread that is waiting on this object's monitor.

final void notifyAll()

Wakes up all threads that are waiting on this object's monitor.

String toString()

Returns a string representation of the object.

final void wait(long timeoutMillis, int nanos)

Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

final void wait(long timeoutMillis)

Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

final void wait()

Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Fields

POINT_INFINITY

Added in API level 1
public static final ECPoint POINT_INFINITY

This defines the point at infinity.

Public constructors

ECPoint

Added in API level 1
public ECPoint (BigInteger x, 
                BigInteger y)

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

Parameters
x BigInteger: the affine x-coordinate.

y BigInteger: the affine y-coordinate.

Throws
NullPointerException if x or y is null.

Public methods

equals

Added in API level 1
public boolean equals (Object obj)

Compares this elliptic curve point for equality with the specified object.

Parameters
obj Object: the object to be compared.

Returns
boolean true if obj is an instance of ECPoint and the affine coordinates match, false otherwise.

getAffineX

Added in API level 1
public BigInteger getAffineX ()

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

Returns
BigInteger the affine x-coordinate.

getAffineY

Added in API level 1
public BigInteger getAffineY ()

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

Returns
BigInteger the affine y-coordinate.

hashCode

Added in API level 1
public int hashCode ()

Returns a hash code value for this elliptic curve point.

Returns
int a hash code value.