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

All Methods Instance Methods Concrete Methods
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 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(), 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.
    
    See Also:
    
    Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)