ToDoubleFunction represents a function that produces a double-valued result. This is the double-producing primitive specialization for Function.
The following example shows how to use ToDoubleFunction
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import java.util.function.ToDoubleFunction; //from w w w .j a v a2 s. c o m public class Main { public static void main(String[] args) { ToDoubleFunction<Integer> i = (x)-> Math.sin(x); System.out.println(i.applyAsDouble(Integer.MAX_VALUE)); } }
The code above generates the following result.