Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary: [Ctors](https://developer.android.com/reference/java/security/spec/ECFieldFp#pubctors) \| [Methods](https://developer.android.com/reference/java/security/spec/ECFieldFp#pubmethods) \| [Inherited Methods](https://developer.android.com/reference/java/security/spec/ECFieldFp#inhmethods)

# ECFieldFp


`
public


class
ECFieldFp
`


`

extends https://developer.android.com/reference/java/lang/Object


`

`


implements

https://developer.android.com/reference/java/security/spec/ECField


`

|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) ||
| ↳ | java.security.spec.ECFieldFp |

<br />

*** ** * ** ***

This immutable class defines an elliptic curve (EC) prime
finite field.
**See also:**

- `https://developer.android.com/reference/java/security/spec/ECField`

## Summary

| ### Public constructors ||
|---|---|
| ` https://developer.android.com/reference/java/security/spec/ECFieldFp#ECFieldFp(java.math.BigInteger)(https://developer.android.com/reference/java/math/BigInteger p) ` Creates an elliptic curve prime finite field with the specified prime `p`. |

| ### Public methods ||
|---|---|
| ` boolean` | ` https://developer.android.com/reference/java/security/spec/ECFieldFp#equals(java.lang.Object)(https://developer.android.com/reference/java/lang/Object obj) ` Compares this prime finite field for equality with the specified object. |
| ` int` | ` https://developer.android.com/reference/java/security/spec/ECFieldFp#getFieldSize()() ` Returns the field size in bits which is size of prime p for this prime finite field. |
| ` https://developer.android.com/reference/java/math/BigInteger` | ` https://developer.android.com/reference/java/security/spec/ECFieldFp#getP()() ` Returns the prime `p` of this prime finite field. |
| ` int` | ` https://developer.android.com/reference/java/security/spec/ECFieldFp#hashCode()() ` Returns a hash code value for this prime finite field. |

| ### Inherited methods |
|---|---|
| From class ` https://developer.android.com/reference/java/lang/Object ` |---|---| | ` https://developer.android.com/reference/java/lang/Object` | ` https://developer.android.com/reference/java/lang/Object#clone()() ` Creates and returns a copy of this object. | | ` boolean` | ` https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object)(https://developer.android.com/reference/java/lang/Object obj) ` Indicates whether some other object is "equal to" this one. | | ` void` | ` https://developer.android.com/reference/java/lang/Object#finalize()() ` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. | | ` final https://developer.android.com/reference/java/lang/Class<?>` | ` https://developer.android.com/reference/java/lang/Object#getClass()() ` Returns the runtime class of this `Object`. | | ` int` | ` https://developer.android.com/reference/java/lang/Object#hashCode()() ` Returns a hash code value for the object. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#notify()() ` Wakes up a single thread that is waiting on this object's monitor. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#notifyAll()() ` Wakes up all threads that are waiting on this object's monitor. | | ` https://developer.android.com/reference/java/lang/String` | ` https://developer.android.com/reference/java/lang/Object#toString()() ` Returns a string representation of the object. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#wait(long,%20int)(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. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#wait(long)(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` | ` https://developer.android.com/reference/java/lang/Object#wait()() ` Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*. | ||
| From interface ` https://developer.android.com/reference/java/security/spec/ECField ` |---|---| | ` abstract int` | ` https://developer.android.com/reference/java/security/spec/ECField#getFieldSize()() ` Returns the field size in bits. | ||

## Public constructors

### ECFieldFp

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public ECFieldFp (BigInteger p)
```

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

<br />

| Parameters ||
|---|---|
| `p` | `BigInteger`: the prime. <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/IllegalArgumentException` | if `p` is not positive. |
| `https://developer.android.com/reference/java/lang/NullPointerException` | if `p` is null. |

## Public methods

### equals

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public boolean equals (Object obj)
```

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

<br />

| Parameters ||
|---|---|
| `obj` | `Object`: the object to be compared. <br /> |

| Returns ||
|---|---|
| `boolean` | true if `obj` is an instance of ECFieldFp and the prime value match, false otherwise. <br /> |

### getFieldSize

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int getFieldSize ()
```

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

<br />

| Returns ||
|---|---|
| `int` | the field size in bits. <br /> |

### getP

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public BigInteger getP ()
```

Returns the prime `p` of this prime finite field.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/math/BigInteger` | the prime. <br /> |

### hashCode

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int hashCode ()
```

Returns a hash code value for this prime finite field.

<br />

| Returns ||
|---|---|
| `int` | a hash code value. <br /> |