# Uses of Interface
java.util.function.DoubleUnaryOperator

Packages that use DoubleUnaryOperator
Package
Description
java.util.function
Functional interfaces provide target types for lambda expressions and method references.
java.util.stream
Classes to support functional-style operations on streams of elements, such as map-reduce transformations on collections.

## Uses of DoubleUnaryOperator in java.util.function

Methods in java.util.function that return DoubleUnaryOperator
Modifier and Type
Method
Description
`default DoubleUnaryOperator`
DoubleUnaryOperator.`andThen(DoubleUnaryOperator after)`
Returns a composed operator that first applies this operator to its input, and then applies the `after` operator to the result.
`default DoubleUnaryOperator`
DoubleUnaryOperator.`compose(DoubleUnaryOperator before)`
Returns a composed operator that first applies the `before` operator to its input, and then applies this operator to the result.
`static DoubleUnaryOperator`
DoubleUnaryOperator.`identity()`
Returns a unary operator that always returns its input argument.
Methods in java.util.function with parameters of type DoubleUnaryOperator
Modifier and Type
Method
Description
`default DoubleUnaryOperator`
DoubleUnaryOperator.`andThen(DoubleUnaryOperator after)`
Returns a composed operator that first applies this operator to its input, and then applies the `after` operator to the result.
`default DoubleUnaryOperator`
DoubleUnaryOperator.`compose(DoubleUnaryOperator before)`
Returns a composed operator that first applies the `before` operator to its input, and then applies this operator to the result.

## Uses of DoubleUnaryOperator in java.util.stream

Methods in java.util.stream with parameters of type DoubleUnaryOperator
Modifier and Type
Method
Description
`static DoubleStream`
DoubleStream.`iterate(double seed, DoublePredicate hasNext, DoubleUnaryOperator next)`
Returns a sequential ordered `DoubleStream` produced by iterative application of the given `next` function to an initial element, conditioned on satisfying the given `hasNext` predicate.
`static DoubleStream`
DoubleStream.`iterate(double seed, DoubleUnaryOperator f)`
Returns an infinite sequential ordered `DoubleStream` produced by iterative application of a function `f` to an initial element `seed`, producing a `Stream` consisting of `seed`, `f(seed)`, `f(f(seed))`, etc.
`DoubleStream`
DoubleStream.`map(DoubleUnaryOperator mapper)`
Returns a stream consisting of the results of applying the given function to the elements of this stream.