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

# DHGenParameterSpec

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

|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) ||
| ↳ | javax.crypto.spec.DHGenParameterSpec |

<br />

*** ** * ** ***

This class specifies the set of parameters used for generating Diffie-Hellman (system) parameters for use in Diffie-Hellman key agreement. This is typically done by a central authority.

The central authority, after computing the parameters, must send this information to the parties looking to agree on a secret key.
**See also:**

- `https://developer.android.com/reference/javax/crypto/spec/DHParameterSpec`

## Summary

| ### Public constructors ||
|---|---|
| ` https://developer.android.com/reference/javax/crypto/spec/DHGenParameterSpec#DHGenParameterSpec(int,%20int)(int primeSize, int exponentSize) ` Constructs a parameter set for the generation of Diffie-Hellman (system) parameters. |

| ### Public methods ||
|---|---|
| ` int` | ` https://developer.android.com/reference/javax/crypto/spec/DHGenParameterSpec#getExponentSize()() ` Returns the size in bits of the random exponent (private value). |
| ` int` | ` https://developer.android.com/reference/javax/crypto/spec/DHGenParameterSpec#getPrimeSize()() ` Returns the size in bits of the prime modulus. |

### 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

### DHGenParameterSpec

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

```
public DHGenParameterSpec (int primeSize, 
                int exponentSize)
```

Constructs a parameter set for the generation of Diffie-Hellman (system) parameters. The constructed parameter set can be used to initialize an `https://developer.android.com/reference/java/security/AlgorithmParameterGenerator` object for the generation of Diffie-Hellman parameters.

<br />

| Parameters ||
|---|---|
| `primeSize` | `int`: the size (in bits) of the prime modulus. <br /> |
| `exponentSize` | `int`: the size (in bits) of the random exponent. <br /> |

## Public methods

### getExponentSize

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

```
public int getExponentSize ()
```

Returns the size in bits of the random exponent (private value).

<br />

| Returns ||
|---|---|
| `int` | the size in bits of the random exponent (private value) <br /> |

### getPrimeSize

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

```
public int getPrimeSize ()
```

Returns the size in bits of the prime modulus.

<br />

| Returns ||
|---|---|
| `int` | the size in bits of the prime modulus <br /> |