DoubleToIntFunction 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 double-valued argument and produces an 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 DoubleToIntFunction Interface by using different examples.

DoubleToIntFunction_Interface_Java8_Techndeck

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

Look at DoubleToIntFunction Javadoc description below:

DoubleToIntFunctionInterface_Signature_Java8_Techndeck

DoubleToIntFunction Interface contains following method:

applyAsInt

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

Lets understand above mentioned method thorough below example:

Example: ‘applyAsInt’ method

Output:
Java 8 DoubleToIntFunction 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.

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

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Author

  • Deepak Verma is a Test Automation Consultant and Software development Engineer for more than 10 years. His mission is to help you become an In-demand full stack automation tester. He is also the founder of Techndeck, a blog and online coaching platform dedicated to helping you succeed with all the automation basics to advanced testing automation tricks.

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