Class ECFieldFp

java.lang.Object

java.security.spec.ECFieldFp

All Implemented Interfaces:: ECField

public class ECFieldFp extends Object implements ECField

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

Since:

1.5

See Also:

Constructor Summary

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

Method Summary

Modifier and Type	Method	Description
`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.

Methods declared in class Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Modifier and Type	Method	Description
`protected Object`	`clone()`	Creates and returns a copy of this object.
`protected void`	`finalize()`	Deprecated, for removal: This API element is subject to removal in a future version. Finalization is deprecated and subject to removal in a future release.
`final Class<?>`	`getClass()`	Returns the runtime class of this `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()`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
`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(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.

Constructor Details

ECFieldFp

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.

Method Details

getFieldSize

public int getFieldSize()

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

Specified by:: getFieldSize in interface ECField
Returns:: the field size in bits.

getP

public BigInteger getP()

Returns the prime p of this prime finite field.

Returns:: the prime.

equals

public boolean equals(Object obj)

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

Overrides:

equals in class Object

Parameters:

obj - the object to be compared.

Returns:

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

See Also:

hashCode

public int hashCode()

Returns a hash code value for this prime finite field.

Overrides:

hashCode in class Object

Returns:

a hash code value for this prime finite field

See Also:

© 1993, 2025, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.