Uses of Class java.lang.Double (Java Platform SE 8 )
Date: 2026-03-16

## Uses of Class
java.lang.Double

- Packages that use Double
  Package | Description
  --- | ---
  java.lang | Provides classes that are fundamental to the design of the Java programming language.
  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.stream | Classes to support functional-style operations on streams of elements, such as map-reduce transformations on collections.
  javax.management.openmbean | Provides the open data types and Open MBean descriptor classes.

- - ### Uses of Double in java.lang

    Fields in java.lang with type parameters of type Double
    Modifier and Type | Field and Description
    --- | ---
    `static Class<Double>` | Double.`TYPE` The `Class` instance representing the primitive type `double`.

    Methods in java.lang that return Double
    Modifier and Type | Method and Description
    --- | ---
    `static Double` | Double.`valueOf(double d)` Returns a `Double` instance representing the specified `double` value.
    `static Double` | Double.`valueOf(String s)` Returns a `Double` object holding the `double` value represented by the argument string `s`.

    Methods in java.lang with parameters of type Double
    Modifier and Type | Method and Description
    --- | ---
    `int` | Double.`compareTo(Double anotherDouble)` Compares two `Double` objects numerically.

  - ### Uses of Double in java.util

    Methods in java.util that return Double
    Modifier and Type | Method and Description
    --- | ---
    `default Double` | PrimitiveIterator.OfDouble.`next()` Returns the next element in the iteration.

    Method parameters in java.util with type arguments of type Double
    Modifier and Type | Method and Description
    --- | ---
    `default void` | PrimitiveIterator.OfDouble.`forEachRemaining(Consumer<? super Double> action)` Performs the given action for each remaining element until all elements have been processed or the action throws an exception.
    `default void` | Spliterator.OfDouble.`forEachRemaining(Consumer<? super Double> action)` Performs the given action for each remaining element, sequentially in the current thread, until all elements have been processed or the action throws an exception.
    `default boolean` | Spliterator.OfDouble.`tryAdvance(Consumer<? super Double> action)` If a remaining element exists, performs the given action on it, returning `true`; else returns `false`.

  - ### Uses of Double in java.util.stream

    Methods in java.util.stream that return types with arguments of type Double
    Modifier and Type | Method and Description
    --- | ---
    `static <T> Collector<T,?,Double>` | Collectors.`averagingDouble(ToDoubleFunction<? super T> mapper)` Returns a `Collector` that produces the arithmetic mean of a double-valued function applied to the input elements.
    `static <T> Collector<T,?,Double>` | Collectors.`averagingInt(ToIntFunction<? super T> mapper)` Returns a `Collector` that produces the arithmetic mean of an integer-valued function applied to the input elements.
    `static <T> Collector<T,?,Double>` | Collectors.`averagingLong(ToLongFunction<? super T> mapper)` Returns a `Collector` that produces the arithmetic mean of a long-valued function applied to the input elements.
    `Stream<Double>` | DoubleStream.`boxed()` Returns a `Stream` consisting of the elements of this stream, boxed to `Double`.
    `static <T> Collector<T,?,Double>` | Collectors.`summingDouble(ToDoubleFunction<? super T> mapper)` Returns a `Collector` that produces the sum of a double-valued function applied to the input elements.

  - ### Uses of Double in javax.management.openmbean

    Fields in javax.management.openmbean with type parameters of type Double
    Modifier and Type | Field and Description
    --- | ---
    `static SimpleType<Double>` | SimpleType.`DOUBLE` The `SimpleType` instance describing values whose Java class name is `java.lang.Double`.

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