LongToIntFunction 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 accepts a long-valued argument 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 LongToIntFunction Interface by using different examples.

LongToIntFunction_Interface_Java8_Techndeck

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

Look at LongToIntFunction Javadoc description below:

LongToIntFunctionInterface_Signature_Java8_Techndeck

LongToIntFunction Interface contains following method:

applyAsInt

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

Lets understand above mentioned method through below example:

Example: ‘applyAsInt’ method

Output:
Java 8 LongToIntFunction 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.

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

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