File	Doc	Category	Size	Date	Package
ECPoint.java	API Doc	Java SE 5 API	2558	Fri Aug 26 14:57:18 BST 2005	java.security.spec

ECPoint

• java.lang.Object

Fields Summary
private final BigInteger	x
private final BigInteger	y
public static final ECPoint	POINT_INFINITY This defines the point at infinity.

Constructors Summary
private ECPoint() // private constructor for constructing point at infinity this.x = null; this.y = null;
public ECPoint(BigInteger x, BigInteger y) Creates an ECPoint from the specified affine x-coordinate x and affine y-coordinate y. param x the affine x-coordinate. param y the affine y-coordinate. exception NullPointerException if x or y is null. if ((x==null) || (y==null)) { throw new NullPointerException("affine coordinate x or y is null"); } this.x = x; this.y = y;

Methods Summary
public boolean	equals(java.lang.Object obj) Compares this elliptic curve point for equality with the specified object. param obj the object to be compared. return true if obj is an instance of ECPoint and the affine coordinates match, false otherwise. if (this == obj) return true; if (this == POINT_INFINITY) return false; if (obj instanceof ECPoint) { return ((x.equals(((ECPoint)obj).x)) && (y.equals(((ECPoint)obj).y))); } return false;
public java.math.BigInteger	getAffineX() Returns the affine x-coordinate x. Note: POINT_INFINITY has a null affine x-coordinate. return the affine x-coordinate. return x;
public java.math.BigInteger	getAffineY() Returns the affine y-coordinate y. Note: POINT_INFINITY has a null affine y-coordinate. return the affine y-coordinate. return y;
public int	hashCode() Returns a hash code value for this elliptic curve point. return a hash code value. if (this == POINT_INFINITY) return 0; return x.hashCode() << 5 + y.hashCode();