DoubleStream.Builder

AI-generated Key Takeaways

• DoubleStream.Builder is used to create a DoubleStream by adding elements individually.

• It has two phases: a building phase where elements are added and a built phase where the stream is created and no more elements can be added.

• accept(double) and add(double) methods add elements to the stream during the building phase.

• build() method creates the DoubleStream and transitions the builder to the built state, after which no further modifications are allowed.

public static interface DoubleStream.Builder implements DoubleConsumer

A mutable builder for a DoubleStream.

A stream builder has a lifecycle, which starts in a building phase, during which elements can be added, and then transitions to a built phase, after which elements may not be added. The built phase begins when the build() method is called, which creates an ordered stream whose elements are the elements that were added to the stream builder, in the order they were added.

See Also

• DoubleStream.builder()

Public Method Summary

abstract void	accept(double t) Adds an element to the stream being built.
DoubleStream.Builder	add(double t) Adds an element to the stream being built.
abstract DoubleStream	build() Builds the stream, transitioning this builder to the built state.

Inherited Method Summary

From interface java.util.function.DoubleConsumer

abstract void	accept(double value) Performs this operation on the given argument.
DoubleConsumer	andThen(DoubleConsumer after) Returns a composed DoubleConsumer that performs, in sequence, this operation followed by the after operation.

Public Methods

public abstract void accept (double t)

Adds an element to the stream being built.

Parameters

t	the input argument

Throws

IllegalStateException	if the builder has already transitioned to the built state

public DoubleStream.Builder add (double t)

Adds an element to the stream being built.

Parameters

t	the element to add

Returns

• this builder

Throws

IllegalStateException	if the builder has already transitioned to the built state

public abstract DoubleStream build ()

Builds the stream, transitioning this builder to the built state. An IllegalStateException is thrown if there are further attempts to operate on the builder after it has entered the built state.

Returns

• the built stream

Throws

IllegalStateException	if the builder has already transitioned to the built state