Java Module java.base Package java.util.function Interface DoubleFunction<R>（JDK11）

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Type Parameters:

R - the type of the result of 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 DoubleFunction<R>
```
Represents a function that accepts a double-valued argument and produces a result. This is the double-consuming primitive specialization for Function.
This is a functional interface whose functional method is apply(double).

Since:

1.8

See Also:

Function

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`R`	`apply(double value)`	Applies this function to the given argument.

- Method Detail
  - apply
```
R apply(double value)
```
    Applies this function to the given argument.
    
    Parameters:
    
    value - the function argument
    
    Returns:
    
    the function result

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