public
static
interface
Stream.Builder
implements
Consumer<T>
| java.util.stream.Stream.Builder<T> |
A mutable builder for a Stream. This allows the creation of a
Stream by generating elements individually and adding them to the
Builder (without the copying overhead that comes from using
an ArrayList as a temporary buffer.)
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:
Public methods | |
|---|---|
abstract
void
|
accept(T t)
Adds an element to the stream being built. |
default
Builder<T>
|
add(T t)
Adds an element to the stream being built. |
abstract
Stream<T>
|
build()
Builds the stream, transitioning this builder to the built state. |
Inherited methods | |
|---|---|
 From
interface
java.util.function.Consumer
| |
void accept (T t)
Adds an element to the stream being built.
| Parameters | |
|---|---|
t |
T:
the input argument
|
| Throws | |
|---|---|
IllegalStateException |
if the builder has already transitioned to the built state |
Builder<T> add (T t)
Adds an element to the stream being built.
Developers
accept(t)
return this;
| Parameters | |
|---|---|
t |
T:
the element to add |
| Returns | |
|---|---|
Builder<T> |
this builder |
| Throws | |
|---|---|
IllegalStateException |
if the builder has already transitioned to the built state |
Stream<T> 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 | |
|---|---|
Stream<T> |
the built stream |
| Throws | |
|---|---|
IllegalStateException |
if the builder has already transitioned to the built state |