#73 Lambda Expression in Java

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In this lecture, we are discussing lambda expression:
#1 what is lambda expression in java?
-- In Java, a lambda expression is a concise way to implement a functional interface.
A functional interface is an interface that has only one abstract method, and it can be implemented using a lambda expression.
-- In the previous lecture we see that we are making a class or inner class to implement the functional interface
but using lambda expression we do not need of new class and inner class to implement.
#2 Properties of the lambda expression
Concise syntax: Lambda expressions provide a concise and expressive syntax for defining functional interfaces.
They allow you to define the behaviour of a functional interface in a single line of code.
Functional programming: Lambda expressions are a key component of functional programming in Java.
They allow you to write code that is more declarative and expressive, and less verbose than traditional imperative code.
No need for anonymous inner classes: Lambda expressions provide an alternative to anonymous inner classes, which are often
used to implement functional interfaces in Java. Lambda expressions are more concise and easier to read than anonymous inner classes.
#3 example:
class Main{
public static void main(String []args){
A obj = new B();
obj.show();
//another way to implement functional interface
A obj1 = new A(){
@Override
public void show(){
System.out.println("Hello");
}
};
obj1.show();
//now we can use a lambda expression to implement the functional interface
//you can remove new A() and public void show() and replace it with () -grater then System.out.println("Hello");
//if you have single statements you need not mention curly braces and return keyword
A obj2 = () - grater then System.out.println("Hello");
obj2.show();
//here you can use lambda expression to implement interface C
C obj3= i-grater then System.out.println(i);
obj3.show(5);
}
}
//one way to implement functional interface
class B implements A{
@Override
public void show(){
System.out.println("Hello");
}
}
//specify it is functional interface
@FunctionalInterface //we use this annotation to specify it is functional interface
interface A{
void show();
//void run(); //this will give error as it is not functional interface
}
interface C{
public void show(int i);
}
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[@옥자-p5r]

I cannot believe this amazing lecture is just for FREE... thank you, sir. You made the world smarter!

[@addytechie6948]

[00:00] Lambda expressions in Java simplify instantiation of functional interfaces.
[01:37] The arrow in Lambda expressions replaces the need for writing the entire method body.
[02:31]Lambda expressions are syntactic sugar, reducing code by simplifying the instantiation of functional interfaces.
[03:56]Lambda expressions can handle parameters, and you can skip mentioning the variable type and use shorthand syntax.
[05:45]) Lambda expressions save on file creation, reducing the number of generated class files.

[@akej2463]

1:25 Gave me a much better look at lambas, cool video

[@StudyStuff-pk7gv]

you make this complex thing look so simple..huge respect for you

[@vengateshan7800]

Sir , your way of explanation is awesome and quickly understandable. Please keep post more videos 👍

[@NiveditaUmasankar]

Thank you for simplifying Lambda. One of the clearest explanations

[@SahabasKhan]

others make it much difficult bt you are explaining very simple and understandable ,thanks sir 🥰

[@yousufbaig821]

Beautifully explained !!
Next time I visit Hyderabad I wanna host you a biryani treat :)

[@alexandrumuhulica6665]

So simple and compact, finally I understood this! Thank you

[@veenabakare9100]

Sir..amazing lecture it is. u just made it easier to understand it Sir. Thanks you so much for these videos

[@ShanSiraj]

excellent simplification, Thanks

[@ravan_hajiyev]

thanks for the explanation teacher by the way ) good and smooth with your humorious speaking
)

[@Aminerami5749]

This lambda thing is amazing. thank you

[@amanchopra5431]

One of the best video 😊

[@ganithpeiris3960]

nice explanation.thanks

[@puruagni1927]

I liked the lecture, but when you said shorter code syntactical sugar I couldn't help myself from laughing being a python programmer 😂😂. But then again, great lecture!

[@lesterjayabiad3347]

thanks for sharing free knowledge sir.

[@ritiktrivedi8780]

Amazing 🎉

[@youssefoubrik5254]

Thank you sir

[@ajayghode3602]

Thank You. Awesome!

[@rutukeshparmaj2068]

Thank You❤

[@ukaszkiepas57]

thank you mate !!!!

[@ravan_hajiyev]

lol: Java says: hey, don't worry i am there )))

[@movietrailer3616]

Where is the complete Playlist of this series I can't find

[@poojasuryavanshi6005]

Hello,In your previous videos of interface you said that we can't instantiate the interface or create the object but here how you created the object of an interface A here? Can you please explain me

[@yousufbaig821]

Achieving python using Java 🤣😂

[@sitharainfotechnologies304]

hi bro
on above if Interface you mentioned
FunctionalInterface right
that is why bro?
can you please help me to understand that
Thanks
C Ashoka

[@sife1808]

@@harizahmad100 Only one abstract method to be precise. It may or may not have default methods.

[@koyacrab]

its an annotation, watch the vid right before this one in the playlist

[@jyotiradityatripathi6095]

❤

[@AK-tt7fc]

Hi , here we dont need implements keyword . kindly any one clarify on this .

[@adanskiesabaria]

how to chat arrow like that ?

[@samartajshaikh2601]

again a cliffhanger at the end. This is good though, you are keeping every video limited to one crucial lesson.

[@Moinshaikh611]

I came from javascript background
It's similar to arrow function 😅

[@Thunder_Venom]

yaa bro

[@CLASH.FIRE777]

Tomorrow is exam 😅😅

[@ADmotivation-2.0]

Same here😂

[@inoxide5454]

ARE YOU REDDY FOR LAMBDAS..? 🐑

[@Kings238]

ho pretty