Added in [API level 35](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary: [Methods](https://developer.android.com/reference/java/util/random/RandomGenerator.StreamableGenerator#pubmethods) \| [Inherited Methods](https://developer.android.com/reference/java/util/random/RandomGenerator.StreamableGenerator#inhmethods)

# RandomGenerator.StreamableGenerator

` public static interface RandomGenerator.StreamableGenerator `   
` implements https://developer.android.com/reference/java/util/random/RandomGenerator `

|---|
| java.util.random.RandomGenerator.StreamableGenerator |

Known indirect subclasses [RandomGenerator.ArbitrarilyJumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator), [RandomGenerator.JumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator), [RandomGenerator.LeapableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.LeapableGenerator), [RandomGenerator.SplittableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.SplittableGenerator), [SplittableRandom](https://developer.android.com/reference/java/util/SplittableRandom) [RandomGenerator.ArbitrarilyJumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator) This interface is designed to provide a common protocol for objects that generate sequences of pseudorandom values and can easily *jump* forward, by an arbitrary amount, to a distant point in the state cycle. [RandomGenerator.JumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator) This interface is designed to provide a common protocol for objects that generate pseudorandom values and can easily *jump* forward, by a moderate amount (ex. [RandomGenerator.LeapableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.LeapableGenerator) This interface is designed to provide a common protocol for objects that generate sequences of pseudorandom values and can easily not only jump but also *leap* forward, by a large amount (ex. [RandomGenerator.SplittableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.SplittableGenerator) This interface is designed to provide a common protocol for objects that generate sequences of pseudorandom values and can be *split* into two objects (the original one and a new one) each of which obey that same protocol (and therefore can be recursively split indefinitely). [SplittableRandom](https://developer.android.com/reference/java/util/SplittableRandom) A generator of uniform pseudorandom values (with period 2^64^) applicable for use in (among other contexts) isolated parallel computations that may generate subtasks.   

*** ** * ** ***

The `https://developer.android.com/reference/java/util/random/RandomGenerator.StreamableGenerator` interface augments the `https://developer.android.com/reference/java/util/random/RandomGenerator` interface to provide methods that return streams of `https://developer.android.com/reference/java/util/random/RandomGenerator` objects. Ideally, such a stream of objects would have the property that the behavior of each object is statistically independent of all the others. In practice, one may have to settle for some approximation to this property.

A generator that implements interface `https://developer.android.com/reference/java/util/random/RandomGenerator.SplittableGenerator` may choose to use its `https://developer.android.com/reference/java/util/random/RandomGenerator.SplittableGenerator#splits()`() method to implement the `https://developer.android.com/reference/java/util/random/RandomGenerator.StreamableGenerator#rngs()`() method required by this interface.

A generator that implements interface `https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator` may choose to use its `https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator#jumps()`() method to implement the `https://developer.android.com/reference/java/util/random/RandomGenerator.StreamableGenerator#rngs()`() method required by this interface.

A generator that implements interface `https://developer.android.com/reference/java/util/random/RandomGenerator.LeapableGenerator` may choose to use its `https://developer.android.com/reference/java/util/random/RandomGenerator.LeapableGenerator#leaps()`() method to implement the `https://developer.android.com/reference/java/util/random/RandomGenerator.StreamableGenerator#rngs()`() method required by this interface.

Objects that implement `https://developer.android.com/reference/java/util/random/RandomGenerator.StreamableGenerator` are typically not cryptographically secure. Consider instead using `https://developer.android.com/reference/java/security/SecureRandom` to get a cryptographically secure pseudo-random number generator for use by security-sensitive applications.

## Summary

| ### Public methods ||
|---|---|
| ` static https://developer.android.com/reference/java/util/random/RandomGenerator.StreamableGenerator` | ` https://developer.android.com/reference/java/util/random/RandomGenerator.StreamableGenerator#of(java.lang.String)(https://developer.android.com/reference/java/lang/String name) ` Returns an instance of `https://developer.android.com/reference/java/util/random/RandomGenerator.StreamableGenerator` that utilizes the `name` [algorithm](https://developer.android.com/reference/java/util/random/package-summary#algorithms). |
| ` default https://developer.android.com/reference/java/util/stream/Stream<https://developer.android.com/reference/java/util/random/RandomGenerator>` | ` https://developer.android.com/reference/java/util/random/RandomGenerator.StreamableGenerator#rngs(long)(long streamSize) ` Returns an effectively unlimited stream of objects, each of which implements the `https://developer.android.com/reference/java/util/random/RandomGenerator` interface. |
| ` abstract https://developer.android.com/reference/java/util/stream/Stream<https://developer.android.com/reference/java/util/random/RandomGenerator>` | ` https://developer.android.com/reference/java/util/random/RandomGenerator.StreamableGenerator#rngs()() ` Returns an effectively unlimited stream of objects, each of which implements the `https://developer.android.com/reference/java/util/random/RandomGenerator` interface. |

### Inherited methods

From interface ` https://developer.android.com/reference/java/util/random/RandomGenerator ` ` default https://developer.android.com/reference/java/util/stream/DoubleStream` ` https://developer.android.com/reference/java/util/random/RandomGenerator#doubles(long,%20double,%20double)(long streamSize, double randomNumberOrigin, double randomNumberBound) `

Returns a stream producing the given `streamSize` number of pseudorandomly chosen `double` values, where each value is between the specified origin (inclusive) and the specified bound (exclusive).
` default https://developer.android.com/reference/java/util/stream/DoubleStream` ` https://developer.android.com/reference/java/util/random/RandomGenerator#doubles(long)(long streamSize) `

Returns a stream producing the given `streamSize` number of pseudorandomly chosen `double` values.
` default https://developer.android.com/reference/java/util/stream/DoubleStream` ` https://developer.android.com/reference/java/util/random/RandomGenerator#doubles()() `

Returns an effectively unlimited stream of pseudorandomly chosen `double` values.
` default https://developer.android.com/reference/java/util/stream/DoubleStream` ` https://developer.android.com/reference/java/util/random/RandomGenerator#doubles(double,%20double)(double randomNumberOrigin, double randomNumberBound) `

Returns an effectively unlimited stream of pseudorandomly chosen `double` values, where each value is between the specified origin (inclusive) and the specified bound (exclusive).
` default https://developer.android.com/reference/java/util/stream/DoubleStream` ` https://developer.android.com/reference/java/util/random/RandomGenerator#equiDoubles(double,%20double,%20boolean,%20boolean)(double left, double right, boolean isLeftIncluded, boolean isRightIncluded) `

Returns an effectively unlimited stream of pseudorandomly chosen `double` values, where each value is between the specified `left` boundary and the specified `right` boundary.
` static https://developer.android.com/reference/java/util/random/RandomGenerator` ` https://developer.android.com/reference/java/util/random/RandomGenerator#getDefault()() `

Returns a `https://developer.android.com/reference/java/util/random/RandomGenerator` meeting the minimal requirement of having an [algorithm](https://developer.android.com/reference/java/util/random/package-summary#algorithms) whose state bits are greater than or equal 64.
` default https://developer.android.com/reference/java/util/stream/IntStream` ` https://developer.android.com/reference/java/util/random/RandomGenerator#ints(long)(long streamSize) `

Returns a stream producing the given `streamSize` number of pseudorandomly chosen `int` values.
` default https://developer.android.com/reference/java/util/stream/IntStream` ` https://developer.android.com/reference/java/util/random/RandomGenerator#ints(int,%20int)(int randomNumberOrigin, int randomNumberBound) `

Returns an effectively unlimited stream of pseudorandomly chosen `int` values, where each value is between the specified origin (inclusive) and the specified bound (exclusive).
` default https://developer.android.com/reference/java/util/stream/IntStream` ` https://developer.android.com/reference/java/util/random/RandomGenerator#ints()() `

Returns an effectively unlimited stream of pseudorandomly chosen `int` values.
` default https://developer.android.com/reference/java/util/stream/IntStream` ` https://developer.android.com/reference/java/util/random/RandomGenerator#ints(long,%20int,%20int)(long streamSize, int randomNumberOrigin, int randomNumberBound) `

Returns a stream producing the given `streamSize` number of pseudorandomly chosen `int` values, where each value is between the specified origin (inclusive) and the specified bound (exclusive).
` default boolean` ` https://developer.android.com/reference/java/util/random/RandomGenerator#isDeprecated()() `

Return true if the implementation of RandomGenerator (algorithm) has been marked for deprecation.
` default https://developer.android.com/reference/java/util/stream/LongStream` ` https://developer.android.com/reference/java/util/random/RandomGenerator#longs(long)(long streamSize) `

Returns a stream producing the given `streamSize` number of pseudorandomly chosen `long` values.
` default https://developer.android.com/reference/java/util/stream/LongStream` ` https://developer.android.com/reference/java/util/random/RandomGenerator#longs()() `

Returns an effectively unlimited stream of pseudorandomly chosen `long` values.
` default https://developer.android.com/reference/java/util/stream/LongStream` ` https://developer.android.com/reference/java/util/random/RandomGenerator#longs(long,%20long)(long randomNumberOrigin, long randomNumberBound) `

Returns an effectively unlimited stream of pseudorandomly chosen `long` values, where each value is between the specified origin (inclusive) and the specified bound (exclusive).
` default https://developer.android.com/reference/java/util/stream/LongStream` ` https://developer.android.com/reference/java/util/random/RandomGenerator#longs(long,%20long,%20long)(long streamSize, long randomNumberOrigin, long randomNumberBound) `

Returns a stream producing the given `streamSize` number of pseudorandomly chosen `long` values, where each value is between the specified origin (inclusive) and the specified bound (exclusive).
` default boolean` ` https://developer.android.com/reference/java/util/random/RandomGenerator#nextBoolean()() `

Returns a pseudorandomly chosen `boolean` value.
` default void` ` https://developer.android.com/reference/java/util/random/RandomGenerator#nextBytes(byte[])(byte[] bytes) `

Fills a user-supplied byte array with generated byte values pseudorandomly chosen uniformly from the range of values between -128 (inclusive) and 127 (inclusive).
` default double` ` https://developer.android.com/reference/java/util/random/RandomGenerator#nextDouble()() `

Returns a pseudorandom `double` value between zero (inclusive) and one (exclusive).
` default double` ` https://developer.android.com/reference/java/util/random/RandomGenerator#nextDouble(double)(double bound) `

Returns a pseudorandomly chosen `double` value between zero (inclusive) and the specified bound (exclusive).
` default double` ` https://developer.android.com/reference/java/util/random/RandomGenerator#nextDouble(double,%20double)(double origin, double bound) `

Returns a pseudorandomly chosen `double` value between the specified origin (inclusive) and the specified bound (exclusive).
` default double` ` https://developer.android.com/reference/java/util/random/RandomGenerator#nextExponential()() `

Returns a nonnegative `double` value pseudorandomly chosen from an exponential distribution whose mean is 1.
` default float` ` https://developer.android.com/reference/java/util/random/RandomGenerator#nextFloat(float,%20float)(float origin, float bound) `

Returns a pseudorandomly chosen `float` value between the specified origin (inclusive) and the specified bound (exclusive).
` default float` ` https://developer.android.com/reference/java/util/random/RandomGenerator#nextFloat()() `

Returns a pseudorandom `float` value between zero (inclusive) and one (exclusive).
` default float` ` https://developer.android.com/reference/java/util/random/RandomGenerator#nextFloat(float)(float bound) `

Returns a pseudorandomly chosen `float` value between zero (inclusive) and the specified bound (exclusive).
` default double` ` https://developer.android.com/reference/java/util/random/RandomGenerator#nextGaussian(double,%20double)(double mean, double stddev) `

Returns a `double` value pseudorandomly chosen from a Gaussian (normal) distribution with a mean and standard deviation specified by the arguments.
` default double` ` https://developer.android.com/reference/java/util/random/RandomGenerator#nextGaussian()() `

Returns a `double` value pseudorandomly chosen from a Gaussian (normal) distribution whose mean is 0 and whose standard deviation is 1.
` default int` ` https://developer.android.com/reference/java/util/random/RandomGenerator#nextInt(int,%20int)(int origin, int bound) `

Returns a pseudorandomly chosen `int` value between the specified origin (inclusive) and the specified bound (exclusive).
` default int` ` https://developer.android.com/reference/java/util/random/RandomGenerator#nextInt()() `

Returns a pseudorandomly chosen `int` value.
` default int` ` https://developer.android.com/reference/java/util/random/RandomGenerator#nextInt(int)(int bound) `

Returns a pseudorandomly chosen `int` value between zero (inclusive) and the specified bound (exclusive).
` default long` ` https://developer.android.com/reference/java/util/random/RandomGenerator#nextLong(long,%20long)(long origin, long bound) `

Returns a pseudorandomly chosen `long` value between the specified origin (inclusive) and the specified bound (exclusive).
` default long` ` https://developer.android.com/reference/java/util/random/RandomGenerator#nextLong(long)(long bound) `

Returns a pseudorandomly chosen `long` value between zero (inclusive) and the specified bound (exclusive).
` abstract long` ` https://developer.android.com/reference/java/util/random/RandomGenerator#nextLong()() `

Returns a pseudorandomly chosen `long` value.
` static https://developer.android.com/reference/java/util/random/RandomGenerator` ` https://developer.android.com/reference/java/util/random/RandomGenerator#of(java.lang.String)(https://developer.android.com/reference/java/lang/String name) `

Returns an instance of `https://developer.android.com/reference/java/util/random/RandomGenerator` that utilizes the `name` [algorithm](https://developer.android.com/reference/java/util/random/package-summary#algorithms).

## Public methods

### of

Added in [API level 35](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static RandomGenerator.StreamableGenerator of (String name)
```

Returns an instance of `https://developer.android.com/reference/java/util/random/RandomGenerator.StreamableGenerator` that utilizes the `name` [algorithm](https://developer.android.com/reference/java/util/random/package-summary#algorithms).

<br />

| Parameters ||
|---|---|
| `name` | `String`: Name of random number generator [algorithm](https://developer.android.com/reference/java/util/random/package-summary#algorithms) <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/util/random/RandomGenerator.StreamableGenerator` | An instance of `https://developer.android.com/reference/java/util/random/RandomGenerator.StreamableGenerator` <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/IllegalArgumentException` | if the named algorithm is not found |
| `https://developer.android.com/reference/java/lang/NullPointerException` | if name is null |

### rngs

Added in [API level 35](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public Stream<RandomGenerator> rngs (long streamSize)
```

Returns an effectively unlimited stream of objects, each of which implements the `https://developer.android.com/reference/java/util/random/RandomGenerator` interface. Ideally the generators in the stream will appear to be statistically independent. The new generators are of the same [algorithm](https://developer.android.com/reference/java/util/random/package-summary#algorithms) as this generator.

<br />

##### Implementation Requirements:

- The default implementation calls `https://developer.android.com/reference/java/util/random/RandomGenerator.StreamableGenerator#rngs()`() and then limits its length to `streamSize`.

| Parameters ||
|---|---|
| `streamSize` | `long`: the number of generators to generate <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/util/stream/Stream<https://developer.android.com/reference/java/util/random/RandomGenerator>` | a stream of objects that implement the `https://developer.android.com/reference/java/util/random/RandomGenerator` interface <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/IllegalArgumentException` | if `streamSize` is less than zero |

### rngs

Added in [API level 35](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public abstract Stream<RandomGenerator> rngs ()
```

Returns an effectively unlimited stream of objects, each of which implements the `https://developer.android.com/reference/java/util/random/RandomGenerator` interface. Ideally the generators in the stream will appear to be statistically independent. The new generators are of the same [algorithm](https://developer.android.com/reference/java/util/random/package-summary#algorithms) as this generator.

<br />

##### Implementation Note:

- It is permitted to implement this method in a manner equivalent to `https://developer.android.com/reference/java/util/random/RandomGenerator.StreamableGenerator#rngs(long)` (`https://developer.android.com/reference/java/lang/Long#MAX_VALUE`).

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/util/stream/Stream<https://developer.android.com/reference/java/util/random/RandomGenerator>` | a stream of objects that implement the `https://developer.android.com/reference/java/util/random/RandomGenerator` interface <br /> |