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JavaTM 2 Platform Standard Ed. 5.0 |
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java.lang.Objectjava.security.spec.ECPoint
public class 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.
| Field Summary | |
|---|---|
static ECPoint |
POINT_INFINITY
This defines the point at infinity. |
| Constructor Summary | |
|---|---|
ECPoint(BigInteger x,
BigInteger y)
Creates an ECPoint from the specified affine x-coordinate x and affine y-coordinate y. |
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| Method Summary | |
|---|---|
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 |
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public static final ECPoint POINT_INFINITY
| Constructor Detail |
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public ECPoint(BigInteger x,
BigInteger y)
x and affine y-coordinate y.
x - the affine x-coordinate.y - the affine y-coordinate.
NullPointerException - if x or
y is null.| Method Detail |
|---|
public BigInteger getAffineX()
x.
Note: POINT_INFINITY has a null affine x-coordinate.
public BigInteger getAffineY()
y.
Note: POINT_INFINITY has a null affine y-coordinate.
public boolean equals(Object obj)
equals in class Objectobj - the object to be compared.
obj is an instance of
ECPoint and the affine coordinates match, false otherwise.Object.hashCode(),
Hashtablepublic int hashCode()
hashCode in class ObjectObject.equals(java.lang.Object),
Hashtable
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Copyright 2004 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.