ECFieldFp (Java 2 Platform SE 5.0) (original) (raw)

java.security.spec

Class ECFieldFp

java.lang.Object extended by 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
ECFieldFp(BigInteger p) Creates an elliptic curve prime finite field with the specified prime p.

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.

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, [wait](../../../java/lang/Object.html#wait%28long, int%29)

Constructor Detail

ECFieldFp

public ECFieldFp(BigInteger p)

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

Parameters:

p - the prime.

Throws:

[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang") - if p is null.

[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang") - if p is not positive.

Method Detail

getFieldSize

public int getFieldSize()

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

Specified by:

[getFieldSize](../../../java/security/spec/ECField.html#getFieldSize%28%29) in interface [ECField](../../../java/security/spec/ECField.html "interface in java.security.spec")

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](../../../java/lang/Object.html#equals%28java.lang.Object%29) in class [Object](../../../java/lang/Object.html "class in java.lang")

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(), Hashtable

hashCode

public int hashCode()

Returns a hash code value for this prime finite field.

Overrides:

[hashCode](../../../java/lang/Object.html#hashCode%28%29) in class [Object](../../../java/lang/Object.html "class in java.lang")

Returns:

a hash code value.

Submit a bug or feature
For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.