DoubleBinaryOperator Interface is a part of the java.util.function package which is introduced in Java 8. It is an in-built Functional Interface. This function expects two arguments of type double as an input and produces a double type result. As it is a functional interface, it can be used assignment target for lambda expression or method reference. In this post, we are going to see several implementations of DoubleBinaryOperator Interface by using different examples.
DoubleBinaryOperator Interface in Java 8 with Examples...!!! Share on X
Look at DoubleBinaryOperator Javadoc description below:
DoubleBinaryOperator Interface contains below method:
applyAsDouble
Let’s discuss this method:
applyAsDouble
This method performs operation on the given arguments and return the double-valued result.
double applyAsDouble(double left, double right);
Lets understand above mentioned method through below example:
Example. ‘applyAsDouble’ method
import java.util.function.DoubleBinaryOperator;
public class DoubleBinaryOperatorInterfaceJava8Example {
public static void main(String[] args) {
System.out.println("DoubleBinaryOperator Interface - 'applyAsDouble' example \n");
//1. Annonymous Implementation
DoubleBinaryOperator annonymousObj = new DoubleBinaryOperator() {
@Override
public double applyAsDouble(double x, double y) {
return x + y;
}
};
//2. Lambda Implementation
DoubleBinaryOperator lambdaObj = (x, y) -> x + y;
//1
System.out.println("Result : " + annonymousObj.applyAsDouble(5, 6));
//2
System.out.println("Result : " + lambdaObj.applyAsDouble(5, 6));
}
}
Output:
DoubleBinaryOperator Interface - 'applyAsDouble' example Result : 11.0 Result : 11.0
Java 8 DoubleBinaryOperator Interface is an absolute useful addition as part of ‘Functional Interfaces’ and can serve variety of purposes. It is quite powerful as it can be used as a higher order functions through lambda functions and above examples could help you to get better idea on how to implement it.
DoubleBinaryOperator Interface in Java 8 with Examples...!!! Share on X
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