| Package | Description | 
|---|---|
| java.util | Contains the collections framework, legacy collection classes, event model,
date and time facilities, internationalization, and miscellaneous utility
classes (a string tokenizer, a random-number generator, and a bit array). | 
| 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. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | DoubleSummaryStatisticsA state object for collecting statistics such as count, min, max, sum, and
 average. | 
| Modifier and Type | Method and Description | 
|---|---|
| default void | Spliterator.OfDouble. forEachRemaining(DoubleConsumer action) | 
| default void | PrimitiveIterator.OfDouble. forEachRemaining(DoubleConsumer action)Performs the given action for each remaining element until all elements
 have been processed or the action throws an exception. | 
| void | OptionalDouble. ifPresent(DoubleConsumer consumer)Have the specified consumer accept the value if a value is present,
 otherwise do nothing. | 
| boolean | Spliterator.OfDouble. tryAdvance(DoubleConsumer action) | 
| Modifier and Type | Method and Description | 
|---|---|
| default DoubleConsumer | DoubleConsumer. andThen(DoubleConsumer after)Returns a composed  DoubleConsumerthat performs, in sequence, this
 operation followed by theafteroperation. | 
| Modifier and Type | Method and Description | 
|---|---|
| default DoubleConsumer | DoubleConsumer. andThen(DoubleConsumer after)Returns a composed  DoubleConsumerthat performs, in sequence, this
 operation followed by theafteroperation. | 
| Modifier and Type | Interface and Description | 
|---|---|
| static interface  | DoubleStream.BuilderA mutable builder for a  DoubleStream. | 
| Modifier and Type | Method and Description | 
|---|---|
| void | DoubleStream. forEach(DoubleConsumer action)Performs an action for each element of this stream. | 
| void | DoubleStream. forEachOrdered(DoubleConsumer action)Performs an action for each element of this stream, guaranteeing that
 each element is processed in encounter order for streams that have a
 defined encounter order. | 
| DoubleStream | DoubleStream. peek(DoubleConsumer action)Returns a stream consisting of the elements of this stream, additionally
 performing the provided action on each element as elements are consumed
 from the resulting stream. | 
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