Module java.base

Package java.security.spec

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:

• ECField

Constructor Summary

Constructors

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 java.lang.Object

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

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:

• Object.hashCode()
• HashMap

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:

• Object.equals(java.lang.Object)
• System.identityHashCode(java.lang.Object)