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25 package java.util.function;
26 
27 /**
28  * Represents a function that accepts an int-valued argument and produces a
29  * double-valued result.  This is the {@code int}-to-{@code double} primitive
30  * specialization for {@link Function}.
31  *
32  * <p>This is a <a href="package-summary.html">functional interface</a>
33  * whose functional method is {@link #applyAsDouble(int)}.
34  *
35  * @see Function
36  * @since 1.8
37  */
38 @FunctionalInterface
39 public interface IntToDoubleFunction {
40 
41     /**
42      * Applies this function to the given argument.
43      *
44      * @param value the function argument
45      * @return the function result
46      */
applyAsDouble(int value)47     double applyAsDouble(int value);
48 }
49