Java.util.function.DoubleBinaryOperator interface with Examples
Last Updated :
18 Jul, 2019
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The DoubleBinaryOperator interface was introduced in Java 8. It represents an operation on two double values and returns the result as a double value. It is a functional interface and thus can be used as a lambda expression or in a method reference. It is mostly used when the operation needs to be encapsulated from the user.
Methods:
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applyAsDouble(): This function takes two double values, performs the required operation and returns the result as a double.
public double applyAsDouble(double val1, double val2)
Example to demonstrate DoubleBinaryOperator interface as a lambda expression .
// Java program to demonstrate DoubleBinaryOperator import java.util.function.DoubleBinaryOperator; public class DoubleBinaryOperatorDemo { public static void main(String[] args) { double x = 7.654; double y = 5.567; // Representing addition as // the double binary operator DoubleBinaryOperator doubleBinaryOperator = (a, b) -> { return a + b; }; System.out.println("x + y = " + doubleBinaryOperator .applyAsDouble(x, y)); // Representing subtraction as // the double binary operator doubleBinaryOperator = (a, b) -> { return a - b; }; System.out.println("x - y = " + doubleBinaryOperator .applyAsDouble(x, y)); // Representing multiplication as // the double binary operator doubleBinaryOperator = (a, b) -> { return a * b; }; System.out.println("x * y = " + doubleBinaryOperator .applyAsDouble(x, y)); // Representing division as // the double binary operator doubleBinaryOperator = (a, b) -> { return a / b; }; System.out.println("x / y = " + doubleBinaryOperator .applyAsDouble(x, y)); // Representing remainder operation // as the double binary operator doubleBinaryOperator = (a, b) -> { return a % b; }; System.out.println("x % y = " + doubleBinaryOperator .applyAsDouble(x, y)); } } |
Output:
x + y = 13.221 x - y = 2.0869999999999997 x * y = 42.609818000000004 x / y = 1.3748877312735763 x % y = 2.0869999999999997
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/function/DoubleBinaryOperator.html
