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/ECPrivateKeySpec#pubctors) \| [Methods](https://developer.android.com/reference/java/security/spec/ECPrivateKeySpec#pubmethods) \| [Inherited Methods](https://developer.android.com/reference/java/security/spec/ECPrivateKeySpec#inhmethods)

# ECPrivateKeySpec

` public class ECPrivateKeySpec `   
` extends https://developer.android.com/reference/java/lang/Object ` ` implements https://developer.android.com/reference/java/security/spec/KeySpec `

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

<br />

*** ** * ** ***

This immutable class specifies an elliptic curve private key with its associated parameters.
**See also:**

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

## Summary

| ### Public constructors ||
|---|---|
| ` https://developer.android.com/reference/java/security/spec/ECPrivateKeySpec#ECPrivateKeySpec(java.math.BigInteger,%20java.security.spec.ECParameterSpec)(https://developer.android.com/reference/java/math/BigInteger s, https://developer.android.com/reference/java/security/spec/ECParameterSpec params) ` Creates a new ECPrivateKeySpec with the specified parameter values. |

| ### Public methods ||
|---|---|
| ` https://developer.android.com/reference/java/security/spec/ECParameterSpec` | ` https://developer.android.com/reference/java/security/spec/ECPrivateKeySpec#getParams()() ` Returns the associated elliptic curve domain parameters. |
| ` https://developer.android.com/reference/java/math/BigInteger` | ` https://developer.android.com/reference/java/security/spec/ECPrivateKeySpec#getS()() ` Returns the private value S. |

### 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*.

## Public constructors

### ECPrivateKeySpec

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

```
public ECPrivateKeySpec (BigInteger s, 
                ECParameterSpec params)
```

Creates a new ECPrivateKeySpec with the specified parameter values.

<br />

| Parameters ||
|---|---|
| `s` | `BigInteger`: the private value. <br /> |
| `params` | `ECParameterSpec`: the associated elliptic curve domain parameters. <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/NullPointerException` | if `s` or `params` is null. |

## Public methods

### getParams

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

```
public ECParameterSpec getParams ()
```

Returns the associated elliptic curve domain parameters.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/security/spec/ECParameterSpec` | the EC domain parameters. <br /> |

### getS

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

```
public BigInteger getS ()
```

Returns the private value S.

<br />

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