java.util.function

## Interface ToDoubleBiFunction<T,U>

- Type Parameters:
    `T` - the type of the first argument to the function
    `U` - the type of the second argument to the function
  Functional Interface:
    This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

      @FunctionalInterface
      public interface ToDoubleBiFunction<T,U>

  Represents a function that accepts two arguments and produces a double-valued result. This is the `double`-producing primitive specialization for `BiFunction`.

  This is a functional interface whose functional method is `applyAsDouble(Object, Object)`.

  Since:
    1.8
  See Also:
    `BiFunction`

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `double` | `applyAsDouble(T t, U u)` Applies this function to the given arguments.

- - ### Method Detail

    - #### applyAsDouble

          double applyAsDouble(T t,
                               U u)

      Applies this function to the given arguments.
      Parameters:
        `t` - the first function argument
        `u` - the second function argument
      Returns:
        the function result

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