Java 8 - Functional Interfaces -Predicate, Function, BinaryOperator,UnaryOperator, Supplier-Consumer

In this video, I have explained about :

JDK 8 Functional Interfaces -
Predicate,
Function,
BinaryOperator,
UnaryOperator,
Supplier,
Consumer

It can be written with @FunctionalInterface annotation also.

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[tushararora]

If teaching is an art, you are a Picasso of it. 🙏. I was always afraid of these topics but now I am able to understand it day by day.

[Tidda]

Very detailed explanation., i was searching this explanation all over the internet and here the search completed.

[jatinsharma]

It shoud be long, I am enjoying :D Thanks, I should have enrolled in your course.

[venkat]

I came here to learn lambda expression, after watching your 6th video in collections. Collection series is very good. Thank you. 🤝🤝🤝

[swamyas]

Thanks for covering most important types

[MrUmang]

This is where Sir java starts to get
Like covering most of the functional interfaces....


Working on comparators


Later on sir we can have videos on javas completable futures and it's similarities with promises in java script...



Ek teer do


Anyways you doing a great job....
Keep helping us like this

[dessam]

Please update selenium video and Free CRN. You are one of the best in YouTube. Please new video

[developerscentre]

Thank you for sharing your knowledge! :)

[vijayaraghavanvashudevan]

Thank you.. Will try to use above functions in my automation code

[tazzyreign]

Excellent tutorial but can someone also share some real world applications of the respective functional interfaces and it's methods, thanks.

[karamjitsinghsehdev]

explained well Naveen but y 2 interfaces for the same purpose, unaryoperator and function.also top 2 interfaces are not used anywhere y so.

[pavithra]

Hi @Naveen ji, i have seen now Bifunction is not T, T, T it is T, U, R which means any types of input arguments and any type of output result. I think this is latest one

[dessam]

Please can you update your selenium with java videos alot have changed. Thanks you

[tulasiramsunkara]

@Naveen Automation Labs : Can you please let us know why Comparable interface is not a Functional Interface though it has only one abstract method compareTo and why comparator is a Functional Interface though it has two abstract methods compare and equals with a demo program.

[arkaimps]

Thanks Naveen for sharing this.
But just wanted to clarify one part where you said BiFunction and BinaryOperator are same. It doesn't seem like that always. BiFunction can have any type of two inputs and any type of Return type, whereas we can replace BiFunction with use of BinaryOperator when both the inputs and output arguments of same type. Please correct me if my understanding is correct?

[amanueltesfu]

public static void main(String[] args) {
Consumer<String> func = x -> System.out.println(x);
// void accept(T t) is an abstract method
func.accept("This is Naveen here!!!"); // This is Naveen here!!!

List<Integer> list = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 125, 1453, 23456, 852);
list.forEach(x -> System.out.print(x + "\t"));
//

System.out.println();

list.forEach(x -> "\t")); // prints the length . Example 23456 has 5 digits, therefore length = 5
// 1 1 1 1 1 1 1 1 1 2 3 4 5 3
}