#73 Lambda Expression in Java

Telusko Courses:
Spring and Microservices Live Course : bit.ly/springmslive
Coupon: TELUSKO25 (25% Discount)
Industry-Ready Java Spring Microservices Developer Live : bit.ly/JavaMS2
Complete Java Developer Course : bit.ly/Comp-Java-Dev-2
Coupon: TELUSKO20 (20% Discount)
Udemy Courses:
Java:- bit.ly/JavaUdemyTelusko
Spring:- bit.ly/SpringUdemyTelusko
Java For Programmers:- bit.ly/javaProgrammers
For More Queries WhatsApp or Call on : [phone]
website : courses.telusko.com/
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);
}
Github repo : github.com/navinreddy20/Javac...
Java:- bit.ly/JavaUdemyTelusko
Spring:- bit.ly/SpringUdemyTelusko
More Learning :
Java :- bit.ly/3x6rr0N
Python :- bit.ly/3GRc7JX
Django :- bit.ly/3MmoJK6
JavaScript :- bit.ly/3tiAlHo
Node JS :- bit.ly/3GT4liq
Rest Api :-bit.ly/3MjhZwt
Servlet :- bit.ly/3Q7eA7k
Spring Framework :- bit.ly/3xi7buh
Design Patterns in Java :- bit.ly/3MocXiq
Docker :- bit.ly/3xjWzLA
Blockchain Tutorial :- bit.ly/3NSbOkc
Corda Tutorial:- bit.ly/3thbUKa
Hyperledger Fabric :- bit.ly/38RZCRB
NoSQL Tutorial :- bit.ly/3aJpRuc
Mysql Tutorial :- bit.ly/3thpr4L
Data Structures using Java :- bit.ly/3MuJa7S
Git Tutorial :- bit.ly/3NXyCPu
Donation:
PayPal Id : navinreddy20
www.telusko.com

[@user-zx3so5do1b]

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

[@StudyStuff-pk7gv]

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

[@akej2463]

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

[@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.

[@alexandrumuhulica6665]

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

[@ShanSiraj]

excellent simplification, Thanks

[@lesterjayabiad3347]

thanks for sharing free knowledge sir.

[@NiveditaUmasankar]

Thank you for simplifying Lambda. One of the clearest explanations

[@vengateshan7800]

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

[@ukaszkiepas57]

thank you mate !!!!

[@revan_hajiyev]

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

[@yousufbaig821]

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

[@movietrailer3616]

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

[@rutukeshparmaj2068]

Thank You❤

[@AK-tt7fc]

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

[@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

[@harisahmad7871]

A FunctionalInterface is an interface with only one method

[@sife1808]

@@harisahmad7871 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

[@user-eo6sv1gs7p]

how to chat arrow like that ?

[@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!

[@revan_hajiyev]

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

[@jyotiradityatripathi6095]

❤

[@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

[@yousufbaig821]

Achieving python using Java 🤣😂

[@Kings238]

ho pretty