# RandomGenerator.ArbitrarilyJumpableGenerator
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.ArbitrarilyJumpableGenerator#pubmethods)\|[Inherited Methods](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator#inhmethods)
# RandomGenerator.ArbitrarilyJumpableGenerator
`
public
static
interface
RandomGenerator.ArbitrarilyJumpableGenerator
`
`
implements
`[RandomGenerator.LeapableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.LeapableGenerator)`
`
|---------------------------------------------------------------|
| 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.
Ideally, all[ArbitrarilyJumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator)objects produced by iterative jumping from a single original[ArbitrarilyJumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator)object are statistically independent of one another and individually uniform, provided that they do not traverse overlapping portions of the state cycle. In practice, one must settle for some approximation to independence and uniformity. In particular, a specific implementation may assume that each generator in a stream produced by the[jump](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator#jump())() method is used to produce a number of values no larger than the jump distance specified. Implementors are advised to use algorithms whose period is at least 2^127^.
For many applications, it suffices to jump forward by a power of two or some small multiple of a power of two, but this power of two may not be representable as a`long`value. To avoid the use of[BigInteger](https://developer.android.com/reference/java/math/BigInteger)values as jump distances,`double`values are used instead.
Methods are provided to perform a single jump operation and also to produce a stream of generators produced from the original by iterative copying and jumping of internal state. A typical strategy for a multithreaded application is to create a single[ArbitrarilyJumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator)object, call its[jump](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator#jump())() method exactly once, and then parcel out generators from the resulting stream, one to each thread. However, each generator produced also has type[ArbitrarilyJumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator); with care, different jump distances can be used to traverse the entire state cycle in various ways.
Objects that implement[ArbitrarilyJumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator)are typically not cryptographically secure. Consider instead using[SecureRandom](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 ||
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ` abstract `[RandomGenerator.ArbitrarilyJumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator) | ` `[copy](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator#copy())`() ` Returns a new generator whose internal state is an exact copy of this generator (therefore their future behavior should be identical if subjected to the same series of operations). |
| ` default `[RandomGenerator.ArbitrarilyJumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator) | ` `[copyAndJump](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator#copyAndJump(double))`(double distance) ` Copy this generator, jump this generator forward, then return the copy. |
| ` default void` | ` `[jump](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator#jump())`() ` Alter the state of this pseudorandom number generator so as to jump forward a large, fixed distance (typically 2^64^or more) within its state cycle. |
| ` abstract void` | ` `[jump](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator#jump(double))`(double distance) ` Alter the state of this pseudorandom number generator so as to jump forward a specified distance within its state cycle. |
| ` abstract void` | ` `[jumpPowerOfTwo](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator#jumpPowerOfTwo(int))`(int logDistance) ` Alter the state of this pseudorandom number generator so as to jump forward a distance equal to 2^`logDistance`^within its state cycle. |
| ` default `[Stream](https://developer.android.com/reference/java/util/stream/Stream)`<`[RandomGenerator.ArbitrarilyJumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator)`>` | ` `[jumps](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator#jumps(long,%20double))`(long streamSize, double distance) ` Returns a stream producing the given`streamSize`number of new pseudorandom number generators, each of which implements the[ArbitrarilyJumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator)interface, produced by jumping copies of this generator by different integer multiples of the specified jump distance. |
| ` default `[Stream](https://developer.android.com/reference/java/util/stream/Stream)`<`[RandomGenerator.ArbitrarilyJumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator)`>` | ` `[jumps](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator#jumps(double))`(double distance) ` Returns an effectively unlimited stream of new pseudorandom number generators, each of which implements the[ArbitrarilyJumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator)interface, produced by jumping copies of this generator by different integer multiples of the specified jump distance. |
| ` default void` | ` `[leap](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator#leap())`() ` Alter the state of this pseudorandom number generator so as to jump forward a very large, fixed distance (typically 2^128^or more) within its state cycle. |
| ` static `[RandomGenerator.ArbitrarilyJumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator) | ` `[of](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator#of(java.lang.String))`(`[String](https://developer.android.com/reference/java/lang/String)` name) ` Returns an instance of[ArbitrarilyJumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator)that utilizes the`name`[algorithm](https://developer.android.com/reference/java/util/random/package-summary#algorithms). |
| ### Inherited methods |
|-----------------------|---|
| From interface` `[java.util.random.RandomGenerator.LeapableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.LeapableGenerator)` ` |---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` abstract `[RandomGenerator.LeapableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.LeapableGenerator) | ` `[copy](https://developer.android.com/reference/java/util/random/RandomGenerator.LeapableGenerator#copy())`() ` Returns a new generator whose internal state is an exact copy of this generator (therefore their future behavior should be identical if subjected to the same series of operations). | | ` default `[RandomGenerator.JumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator) | ` `[copyAndLeap](https://developer.android.com/reference/java/util/random/RandomGenerator.LeapableGenerator#copyAndLeap())`() ` Copy this generator, leap this generator forward, then return the copy. | | ` abstract void` | ` `[leap](https://developer.android.com/reference/java/util/random/RandomGenerator.LeapableGenerator#leap())`() ` Alter the state of this pseudorandom number generator so as to leap forward a large, fixed distance (typically 2^96^or more) within its state cycle. | | ` abstract double` | ` `[leapDistance](https://developer.android.com/reference/java/util/random/RandomGenerator.LeapableGenerator#leapDistance())`() ` Returns the distance by which the[leap](https://developer.android.com/reference/java/util/random/RandomGenerator.LeapableGenerator#leap())() method will leap forward within the state cycle of this generator object. | | ` default `[Stream](https://developer.android.com/reference/java/util/stream/Stream)`<`[RandomGenerator.JumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator)`>` | ` `[leaps](https://developer.android.com/reference/java/util/random/RandomGenerator.LeapableGenerator#leaps())`() ` Returns an effectively unlimited stream of new pseudorandom number generators, each of which implements the[JumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator)interface. | | ` default `[Stream](https://developer.android.com/reference/java/util/stream/Stream)`<`[RandomGenerator.JumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator)`>` | ` `[leaps](https://developer.android.com/reference/java/util/random/RandomGenerator.LeapableGenerator#leaps(long))`(long streamSize) ` Returns a stream producing the given`streamSize`number of new pseudorandom number generators, each of which implements the[JumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator)interface. | | ` static `[RandomGenerator.LeapableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.LeapableGenerator) | ` `[of](https://developer.android.com/reference/java/util/random/RandomGenerator.LeapableGenerator#of(java.lang.String))`(`[String](https://developer.android.com/reference/java/lang/String)` name) ` Returns an instance of[LeapableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.LeapableGenerator)that utilizes the`name`[algorithm](https://developer.android.com/reference/java/util/random/package-summary#algorithms). | ||
| From interface` `[java.util.random.RandomGenerator.JumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator)` ` |---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` abstract `[RandomGenerator.JumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator) | ` `[copy](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator#copy())`() ` Returns a new generator whose internal state is an exact copy of this generator (therefore their future behavior should be identical if subjected to the same series of operations). | | ` default `[RandomGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator) | ` `[copyAndJump](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator#copyAndJump())`() ` Copy this generator, jump this generator forward, then return the copy. | | ` abstract void` | ` `[jump](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator#jump())`() ` Alter the state of this pseudorandom number generator so as to jump forward a large, fixed distance (typically 2^64^or more) within its state cycle. | | ` abstract double` | ` `[jumpDistance](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator#jumpDistance())`() ` Returns the distance by which the[jump](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator#jump())() method will jump forward within the state cycle of this generator object. | | ` default `[Stream](https://developer.android.com/reference/java/util/stream/Stream)`<`[RandomGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator)`>` | ` `[jumps](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator#jumps(long))`(long streamSize) ` Returns a stream producing the given`streamSize`number of new pseudorandom number generators, each of which implements the[RandomGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator)interface. | | ` default `[Stream](https://developer.android.com/reference/java/util/stream/Stream)`<`[RandomGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator)`>` | ` `[jumps](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator#jumps())`() ` Returns an effectively unlimited stream of new pseudorandom number generators, each of which implements the[RandomGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator)interface. | | ` static `[RandomGenerator.JumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator) | ` `[of](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator#of(java.lang.String))`(`[String](https://developer.android.com/reference/java/lang/String)` name) ` Returns an instance of[JumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator)that utilizes the`name`[algorithm](https://developer.android.com/reference/java/util/random/package-summary#algorithms). | | ` default `[Stream](https://developer.android.com/reference/java/util/stream/Stream)`<`[RandomGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator)`>` | ` `[rngs](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator#rngs(long))`(long streamSize) ` Returns a stream producing the given`streamSize`number of new pseudorandom number generators, each of which implements the[RandomGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator)interface. | | ` default `[Stream](https://developer.android.com/reference/java/util/stream/Stream)`<`[RandomGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator)`>` | ` `[rngs](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator#rngs())`() ` Returns an effectively unlimited stream of new pseudorandom number generators, each of which implements the[RandomGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator)interface. | ||
| From interface` `[java.util.random.RandomGenerator.StreamableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.StreamableGenerator)` ` |----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` static `[RandomGenerator.StreamableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.StreamableGenerator) | ` `[of](https://developer.android.com/reference/java/util/random/RandomGenerator.StreamableGenerator#of(java.lang.String))`(`[String](https://developer.android.com/reference/java/lang/String)` name) ` Returns an instance of[StreamableGenerator](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 `[Stream](https://developer.android.com/reference/java/util/stream/Stream)`<`[RandomGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator)`>` | ` `[rngs](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[RandomGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator)interface. | | ` abstract `[Stream](https://developer.android.com/reference/java/util/stream/Stream)`<`[RandomGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator)`>` | ` `[rngs](https://developer.android.com/reference/java/util/random/RandomGenerator.StreamableGenerator#rngs())`() ` Returns an effectively unlimited stream of objects, each of which implements the[RandomGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator)interface. | ||
| From interface` `[java.util.random.RandomGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator)` ` |-------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` default `[DoubleStream](https://developer.android.com/reference/java/util/stream/DoubleStream) | ` `[doubles](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 `[DoubleStream](https://developer.android.com/reference/java/util/stream/DoubleStream) | ` `[doubles](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 `[DoubleStream](https://developer.android.com/reference/java/util/stream/DoubleStream) | ` `[doubles](https://developer.android.com/reference/java/util/random/RandomGenerator#doubles())`() ` Returns an effectively unlimited stream of pseudorandomly chosen`double`values. | | ` default `[DoubleStream](https://developer.android.com/reference/java/util/stream/DoubleStream) | ` `[doubles](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). | | ` static `[RandomGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator) | ` `[getDefault](https://developer.android.com/reference/java/util/random/RandomGenerator#getDefault())`() ` Returns a[RandomGenerator](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 `[IntStream](https://developer.android.com/reference/java/util/stream/IntStream) | ` `[ints](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 `[IntStream](https://developer.android.com/reference/java/util/stream/IntStream) | ` `[ints](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 `[IntStream](https://developer.android.com/reference/java/util/stream/IntStream) | ` `[ints](https://developer.android.com/reference/java/util/random/RandomGenerator#ints())`() ` Returns an effectively unlimited stream of pseudorandomly chosen`int`values. | | ` default `[IntStream](https://developer.android.com/reference/java/util/stream/IntStream) | ` `[ints](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` | ` `[isDeprecated](https://developer.android.com/reference/java/util/random/RandomGenerator#isDeprecated())`() ` Return true if the implementation of RandomGenerator (algorithm) has been marked for deprecation. | | ` default `[LongStream](https://developer.android.com/reference/java/util/stream/LongStream) | ` `[longs](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 `[LongStream](https://developer.android.com/reference/java/util/stream/LongStream) | ` `[longs](https://developer.android.com/reference/java/util/random/RandomGenerator#longs())`() ` Returns an effectively unlimited stream of pseudorandomly chosen`long`values. | | ` default `[LongStream](https://developer.android.com/reference/java/util/stream/LongStream) | ` `[longs](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 `[LongStream](https://developer.android.com/reference/java/util/stream/LongStream) | ` `[longs](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` | ` `[nextBoolean](https://developer.android.com/reference/java/util/random/RandomGenerator#nextBoolean())`() ` Returns a pseudorandomly chosen`boolean`value. | | ` default void` | ` `[nextBytes](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` | ` `[nextDouble](https://developer.android.com/reference/java/util/random/RandomGenerator#nextDouble())`() ` Returns a pseudorandom`double`value between zero (inclusive) and one (exclusive). | | ` default double` | ` `[nextDouble](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` | ` `[nextDouble](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` | ` `[nextExponential](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` | ` `[nextFloat](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` | ` `[nextFloat](https://developer.android.com/reference/java/util/random/RandomGenerator#nextFloat())`() ` Returns a pseudorandom`float`value between zero (inclusive) and one (exclusive). | | ` default float` | ` `[nextFloat](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` | ` `[nextGaussian](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` | ` `[nextGaussian](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` | ` `[nextInt](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` | ` `[nextInt](https://developer.android.com/reference/java/util/random/RandomGenerator#nextInt())`() ` Returns a pseudorandomly chosen`int`value. | | ` default int` | ` `[nextInt](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` | ` `[nextLong](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` | ` `[nextLong](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` | ` `[nextLong](https://developer.android.com/reference/java/util/random/RandomGenerator#nextLong())`() ` Returns a pseudorandomly chosen`long`value. | | ` static `[RandomGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator) | ` `[of](https://developer.android.com/reference/java/util/random/RandomGenerator#of(java.lang.String))`(`[String](https://developer.android.com/reference/java/lang/String)` name) ` Returns an instance of[RandomGenerator](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
### copy
Added in[API level 35](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public abstract RandomGenerator.ArbitrarilyJumpableGenerator copy ()
```
Returns a new generator whose internal state is an exact copy of this generator (therefore their future behavior should be identical if subjected to the same series of operations).
| Returns ||
|-------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------|
| [RandomGenerator.ArbitrarilyJumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator) | a new object that is a copy of this generator
|
### copyAndJump
Added in[API level 35](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public RandomGenerator.ArbitrarilyJumpableGenerator copyAndJump (double distance)
```
Copy this generator, jump this generator forward, then return the copy.
##### Implementation Requirements:
- The default implementation copies this, jumps(distance) and then returns the copy.
| Parameters ||
|------------|--------------------------------------------------------------------|
| `distance` | `double`: a distance to jump forward within the state cycle
|
| Returns ||
|-------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------|
| [RandomGenerator.ArbitrarilyJumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator) | a copy of this generator object before the jump occurred
|
| Throws ||
|--------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------|
| [IllegalArgumentException](https://developer.android.com/reference/java/lang/IllegalArgumentException) | if`distance`is not greater than or equal to 0.0, or is greater than the period of this generator |
### jump
Added in[API level 35](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public void jump ()
```
Alter the state of this pseudorandom number generator so as to jump forward a large, fixed distance (typically 2^64^or more) within its state cycle. The distance used is that returned by method[jumpDistance](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator#jumpDistance())().
##### Implementation Requirements:
- The default implementation invokes jump(jumpDistance()).
### jump
Added in[API level 35](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public abstract void jump (double distance)
```
Alter the state of this pseudorandom number generator so as to jump forward a specified distance within its state cycle.
| Parameters ||
|------------|----------------------------------------------------------------------|
| `distance` | `double`: the distance to jump forward within the state cycle
|
| Throws ||
|--------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------|
| [IllegalArgumentException](https://developer.android.com/reference/java/lang/IllegalArgumentException) | if`distance`is not greater than or equal to 0.0, or is greater than the period of this generator |
### jumpPowerOfTwo
Added in[API level 35](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public abstract void jumpPowerOfTwo (int logDistance)
```
Alter the state of this pseudorandom number generator so as to jump forward a distance equal to 2^`logDistance`^within its state cycle.
| Parameters ||
|---------------|-------------------------------------------------------------------------------------------|
| `logDistance` | `int`: the base-2 logarithm of the distance to jump forward within the state cycle
|
| Throws ||
|--------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------|
| [IllegalArgumentException](https://developer.android.com/reference/java/lang/IllegalArgumentException) | if`logDistance`is 2^`logDistance`^is greater than the period of this generator |
### jumps
Added in[API level 35](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public Stream jumps (long streamSize,
double distance)
```
Returns a stream producing the given`streamSize`number of new pseudorandom number generators, each of which implements the[ArbitrarilyJumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator)interface, produced by jumping copies of this generator by different integer multiples of the specified jump distance.
##### Implementation Requirements:
- The default implementation is equivalent to jumps(distance).limit(streamSize).
| Parameters ||
|--------------|--------------------------------------------------------------------|
| `streamSize` | `long`: the number of generators to generate
|
| `distance` | `double`: a distance to jump forward within the state cycle
|
| Returns ||
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------|
| [Stream](https://developer.android.com/reference/java/util/stream/Stream)`<`[RandomGenerator.ArbitrarilyJumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator)`>` | a stream of objects that implement the[RandomGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator)interface
|
| Throws ||
|--------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------|
| [IllegalArgumentException](https://developer.android.com/reference/java/lang/IllegalArgumentException) | if`streamSize`is less than zero or if`distance`is not greater than or equal to 0.0, or is greater than the period of this generator |
### jumps
Added in[API level 35](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public Stream jumps (double distance)
```
Returns an effectively unlimited stream of new pseudorandom number generators, each of which implements the[ArbitrarilyJumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator)interface, produced by jumping copies of this generator by different integer multiples of the specified jump distance.
##### Implementation Requirements:
- The default implementation is equivalent to[jumps](https://developer.android.com/reference/java/util/random/RandomGenerator.JumpableGenerator#jumps(long))([Long.MAX_VALUE](https://developer.android.com/reference/java/lang/Long#MAX_VALUE)).
| Parameters ||
|------------|--------------------------------------------------------------------|
| `distance` | `double`: a distance to jump forward within the state cycle
|
| Returns ||
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------|
| [Stream](https://developer.android.com/reference/java/util/stream/Stream)`<`[RandomGenerator.ArbitrarilyJumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator)`>` | a stream of objects that implement the[RandomGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator)interface
|
| Throws ||
|--------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------|
| [IllegalArgumentException](https://developer.android.com/reference/java/lang/IllegalArgumentException) | if`distance`is not greater than or equal to 0.0, or is greater than the period of this generator |
### leap
Added in[API level 35](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public void leap ()
```
Alter the state of this pseudorandom number generator so as to jump forward a very large, fixed distance (typically 2^128^or more) within its state cycle. The distance used is that returned by method[leapDistance](https://developer.android.com/reference/java/util/random/RandomGenerator.LeapableGenerator#leapDistance())().
### of
Added in[API level 35](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public static RandomGenerator.ArbitrarilyJumpableGenerator of (String name)
```
Returns an instance of[ArbitrarilyJumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator)that utilizes the`name`[algorithm](https://developer.android.com/reference/java/util/random/package-summary#algorithms).
| Parameters ||
|--------|--------------------------------------------------------------------------------------------------------------------------------------------------|
| `name` | `String`: Name of random number generator[algorithm](https://developer.android.com/reference/java/util/random/package-summary#algorithms)
|
| Returns ||
|-------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [RandomGenerator.ArbitrarilyJumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator) | An instance of[ArbitrarilyJumpableGenerator](https://developer.android.com/reference/java/util/random/RandomGenerator.ArbitrarilyJumpableGenerator)
|
| Throws ||
|--------------------------------------------------------------------------------------------------------|-------------------------------------|
| [NullPointerException](https://developer.android.com/reference/java/lang/NullPointerException) | if name is null |
| [IllegalArgumentException](https://developer.android.com/reference/java/lang/IllegalArgumentException) | if the named algorithm is not found |