ToIntFunction 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 an argument as an input and produces a int-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 ToIntFunction Interface by using different examples.
ToIntFunction Interface in Java 8 with Examples...!!! Click To Tweet
Look at ToIntFunction Javadoc description below:
ToIntFunction Interface contains below method:
applyAsInt
Let’s discuss this method:
applyAsInt
This method performs operation on the given argument and return the int-valued result.
1 | int applyAsInt(T value); |
Lets understand above mentioned method through below example:
Example. ‘applyAsInt’ 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 30 31 | package org.personal.samples; import java.util.function.ToIntFunction; public class ToIntFunctionInterfaceJava8Example { public static void main(String[] args) { System.out.println("ToIntFunction Interface - 'applyAsInt' example \n"); //1. anonymous implementation ToIntFunction <Integer> anonymousObj = new ToIntFunction <Integer> () { @Override public int applyAsInt(Integer value) { return value * 25; } }; //2. lambda implementation ToIntFunction <Integer> lambdaObj = value -> value * 25; //1 System.out.println("Result : " + anonymousObj.applyAsInt(5)); //2 System.out.println("Result : " + lambdaObj.applyAsInt(5)); } } |
1 2 3 4 | ToIntFunction Interface - 'applyAsInt' example Result : 125 Result : 125 |
ToIntFunction Interface in Java 8 with Examples...!!! Click To Tweet
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