IntFunction 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 an int-valued argument as an input and produces a 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 IntFunction Interface by using different examples.

IntFunction_Interface_Java8_Techndeck

IntFunction Interface in Java 8 with Examples...!!! Click To Tweet

Look at IntFunction Javadoc description below:

IntFunctionInterface_Signature_Java8_Techndeck

IntFunction Interface contains below method:

apply

Let’s discuss this method:

apply 

This method performs operation on the given int-valued argument and return a result.

Lets understand above mentioned method through below example:

Example. ‘apply’ method

Output:
Java 8 IntFunction 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.

IntFunction Interface in Java 8 with Examples...!!! Click To Tweet

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