ECFieldFp (Java Platform SE 6) - JDK 5 Documentation v6.0, Java 2 SDK 英文文档

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Java™ Platform
Standard Ed. 6

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java.security.spec
Class ECFieldFp

java.lang.Object
  java.security.spec.ECFieldFp

All Implemented Interfaces:: ECField

public class ECFieldFp
extends Object
implements ECField
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

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`

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 - if p is null.; IllegalArgumentException - 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 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(), Hashtable

hashCode

public int hashCode()

Returns a hash code value for this prime finite field.

Overrides:: hashCode in class Object

Returns:: a hash code value.
See Also:: Object.equals(java.lang.Object), Hashtable