DoubleUnaryOperator represents an operation on a single double-valued operand that produces a double-valued result. This is the primitive type specialization of UnaryOperator for double.
The following example shows how to use DoubleUnaryOperator
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import java.util.function.DoubleUnaryOperator; public class Main { public static void main(String[] args) { DoubleUnaryOperator dl = (x) -> {return x*x;}; System.out.println(dl.applyAsDouble(3.14)); } }
The code above generates the following result.