# Interface DHPrivateKey

All Superinterfaces:
  `AsymmetricKey, DEREncodablePREVIEW, Destroyable, DHKey, Key, PrivateKey, Serializable`

public interface DHPrivateKey extends DHKey, PrivateKey
The interface to a Diffie-Hellman private key.

Since:
  1.4
See Also:
  - `DHKey`
  - `DHPublicKey`

## Field Summary

Fields
Modifier and Type
Field
Description
`static final long`
`serialVersionUID`
Deprecated.
A `serialVersionUID` field in an interface is ineffectual.

## Method Summary

Modifier and Type
Method
Description
`default DHParameterSpec`
`getParams()`
Returns the parameters associated with this key.
`BigInteger`
`getX()`
Returns the private value, `x`.

### Methods declared in interface Destroyable

`destroy, isDestroyed`

### Methods declared in interface Key

`getAlgorithm, getEncoded, getFormat`

## Field Details

### serialVersionUID

@Deprecated static final long serialVersionUID
Deprecated.
A `serialVersionUID` field in an interface is ineffectual. Do not use; no replacement.
The class fingerprint that is set to indicate serialization compatibility since J2SE 1.4.

See Also:
  - Constant Field Values

## Method Details

### getX

BigInteger getX()
Returns the private value, `x`.

Returns:
  the private value, `x`

### getParams

default DHParameterSpec getParams()
Returns the parameters associated with this key. The parameters are optional and may be either explicitly specified or implicitly created during key pair generation.

Specified by:
  `getParams` in interface `AsymmetricKey`
Specified by:
  `getParams` in interface `DHKey`
Implementation Requirements:
  The default implementation returns `null`.
Returns:
  the associated parameters, may be `null`