DoubleFunction represents a function that accepts a double-valued argument and produces a result. This is the double-consuming primitive specialization for Function.
The following example shows how to use DoubleFunction
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import java.util.function.DoubleFunction; // w w w. j av a 2 s . c o m public class Main { public static void main(String[] args) { DoubleFunction<String> df = (d) -> d +" is now a string"; System.out.println(df.apply(0.5)); } }
The code above generates the following result.