ECFieldFp

AI-generated Key Takeaways

• ECFieldFp represents an elliptic curve prime finite field defined by a prime number p.

• It provides methods to get the prime p, the field size in bits, and perform equality checks.

• It is immutable, meaning its value cannot be changed after creation.

• This class is part of the Java security package and is used in elliptic curve cryptography.

• A constructor is provided to create an ECFieldFp instance with a specified prime.

public class ECFieldFp extends Object
implements ECField

This immutable class defines an elliptic curve (EC) prime finite field.

See Also

• ECField

Public Constructor Summary

ECFieldFp(BigInteger p) Creates an elliptic curve prime finite field with the specified prime p.

Public Method Summary

boolean	equals(Object obj) Compares this prime finite field for equality with the specified object.
int	getFieldSize() Returns the field size in bits which is size of prime p for this prime finite field.
BigInteger	getP() Returns the prime p of this prime finite field.
int	hashCode() Returns a hash code value for this prime finite field.

Inherited Method Summary

From class java.lang.Object

Object	clone() Creates and returns a copy of this Object.
boolean	equals(Object obj) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of Class that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait(long timeout, int nanos) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait(long timeout) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait() Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object.

From interface java.security.spec.ECField

abstract int

getFieldSize() Returns the field size in bits.

Public Constructors

public ECFieldFp (BigInteger p)

Creates an elliptic curve prime finite field with the specified prime p.

Parameters

p	the prime.

Throws

NullPointerException	if p is null.
IllegalArgumentException	if p is not positive.

Public Methods

public boolean equals (Object obj)

Compares this prime finite field for equality with the specified object.

Parameters

obj	the object to be compared.

Returns

• true if obj is an instance of ECFieldFp and the prime value match, false otherwise.

public int getFieldSize ()

Returns the field size in bits which is size of prime p for this prime finite field.

Returns

• the field size in bits.

public BigInteger getP ()

Returns the prime p of this prime finite field.

Returns

• the prime.

public int hashCode ()

Returns a hash code value for this prime finite field.

Returns

• a hash code value.