Functional Interfaces in Java | Consumer | Supplier | Function | Predicate
Learn everything you need to know about Functional Interfaces in Java! In this video, I explain what functional interfaces are, how to create a custom functional interface, and how to use the most common built-in ones:
✅Consumer - performs actions on inputs
✅Supplier - provides values without input
✅Function - transforms input to output
✅Predicate - tests a condition and returns a boolean
Whether you're preparing for a Java interview or looking to improve your Java functional programming skills, this tutorial will help you understand these concepts clearly with hands-on examples.
Chapters:
0:00 - 1:15 - Overview
1:16 - 2:00 - Using custom functional interface
2:01 - 4:10 - Consumer
4:11 - 4:51 - Supplier
4:51 - 5:48 - Function
5:49 - 6:25 - Runnable
6:26 - 7:26 - Predicate
7:27 - 7:37 - Ending
🔥 Subscribe for more Java tips → / @maricnemanja
📚 Resources mentioned in this video:
📃Consumer doc ➡️ https://docs.oracle.com/javase/8/docs...
📃Supplier doc ➡️ https://docs.oracle.com/javase/8/docs...
📃Function doc ➡️ https://docs.oracle.com/javase/8/docs...
📃Predicate doc ➡️ https://docs.oracle.com/javase/8/docs...
On this page of the site you can watch the video online Functional Interfaces in Java | Consumer | Supplier | Function | Predicate with a duration of hours minute second in good quality, which was uploaded by the user Marić Nemanja 11 September 2025, share the link with friends and acquaintances, this video has already been watched 407 times on youtube and it was liked by 22 viewers. Enjoy your viewing!
