ToDoubleBiFunction 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 expect two arguments as an input and produces a double-valued 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 ToDoubleBiFunction Interface by using different examples.
ToDoubleBiFunction Interface in Java 8 with Examples...!!! Click To Tweet
Look at ToDoubleBiFunction Javadoc description below:
ToDoubleBiFunction Interface contains below method:
applyAsDouble
Let’s discuss these methods:
applyAsDouble
This method performs operation on the given arguments and return the double-valued result.
1 | double applyAsDouble(T t, U u); |
Lets understand above mentioned method through below example:
Example. ‘applyAsDouble’ method
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 | import java.util.function.ToDoubleBiFunction; public class ToDoubleBiFunctionInterfaceJava8Example1 { public static void main(String[] args) { System.out.println("ToDoubleBiFunction Interface - 'applyAsDouble' example \n"); //1. anonymous implementation ToDoubleBiFunction <Integer, Integer> anonymousObj = new ToDoubleBiFunction <Integer, Integer> () { @Override public double applyAsDouble(Integer t, Integer u) { return t + u; } }; //2. lambda implementation ToDoubleBiFunction <Integer, Integer> lambdaObj = (t, u) -> t + u; //1 System.out.println("Sum of 5 and 8 is: " + anonymousObj.applyAsDouble(5, 8)); //2 System.out.println("Sum of 5 and 8 is: " + lambdaObj.applyAsDouble(5, 8)); } } |
1 2 3 4 | ToDoubleBiFunction Interface - 'applyAsDouble' example Sum of 5 and 8 is: 13.0 Sum of 5 and 8 is: 13.0 |
ToDoubleBiFunction Interface in Java 8 with Examples...!!! Click To Tweet
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