Java lambda λ

/************************************************************************************
@FunctionalInterface
public interface MyInterface {

public void message(String name,char symbol);
}
//******************************* Example 1 **************************************
public class Main {

public static void main(String[] args) {

/* lambda expression = feature for Java 8 and above
* also known as an anonymous method
* a shorter way to write anonymous classes with only one method
*
* need to use a functional interface or use a pre-defined functional interface
* they contain only one abstract method
* ex. ActionListener, Runnable, (user-defined)
*
* A Lambda expression can be used in any place where a functional interface is required
* How to use a lambda expression:
* (arguments) -> {statement/s}
*/

String name = "Bro";
char symbol = '!';

MyInterface myInterface = (x,y) -> {
System.out.println("Heello World!");
System.out.println("It is a nice day "+x+y);
};

MyInterface myInterface2 = (x,y) -> {
System.out.println("Hello "+x+y);
};

myInterface.message(name,symbol);
myInterface2.message(name,symbol);

}

}
//******************************* Example 2 **************************************
public class Main {

public static void main(String[] args) {

MyFrame myFrame = new MyFrame();
}

}
//************************************************************************************

import java.awt.event.*;
import javax.swing.*;

public class MyFrame extends JFrame{

JButton myButton = new JButton("MY BUTTON 1");
JButton myButton2 = new JButton("MY BUTTON 2");

MyFrame(){

myButton.setBounds(100, 100, 200, 100);
myButton.addActionListener(

(e) -> System.out.println("This is the first button")

);

myButton2.setBounds(100, 200, 200, 100);
myButton2.addActionListener(

(e) -> System.out.println("This is the second button")

);

this.add(myButton);
this.add(myButton2);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setSize(420, 420);
this.setLayout(null);
this.setVisible(true);
}
}
//************************************************************************************

Good!

Why ist the abstract method not signed as abstract?

Man why are you doing this for free?

Thanks!

helpful as always!

Seems so pointless, like why even bother doing it this way.

thanks Bro! I finally understand what is the Lambda-expression!

The thing i most like in bro is that he always goes straight to the point

Yeah, I looked at another tutorial first and I did not understand anything.

And then you came along and explained it in a much better way!

Like someone else pointed out, it was really useful that you showed how the anonymous inner class that we are replacing would have looked!

That really makes it a lot easier to understand what is going on! =)

Bro! you da best.

Finally someone who can explain Lambda without causing a headache. Thank u Bro!

Thanks

Thank you, nice explanation with clear examples.

Thanks for leaving your code in the comments, that with your video are going to make things so much easier 👌

Lambalicious

Hey! Thank you for the simple way of explaining complicated concepts. Well done!

The button initially said "MY BUTT..."

Thank you! This is easy enough for me to undestand as a beginner. Other tutorials go to fast or are too advanced for my level.

Great vid, bro!

You gained a new subscriber! Ur explanations are exceptional thank you

A lot easier to understand than most (if not all) of other lambda videos!!! As always, you rock!!!!!

Hi :)

This was really helpful for me. I am learning lambda expressions and you thoroughly covered a wide section on its uses. Thank you,

Ly bro 10

I am soryy, but i am stuck, when you add actionListener and use lambda expression, you pass "e" as an argument of your method, but this "e" you didn't assigned nowhere, so how does it works?

thaaanks bro! :D

I like my coffee like I like my women.
Not yelling at me.

Great Java tutorial, thank you!

Hi Bro, You have mentioned that the Functional Interfaces have only one abstract method. How many different kinds of interfaces do we have in Java?

my BUTT....

I like all yours video about java(my listening isn't good) but I can understand all you say ...thank for all ...a hug from Rep Dom

Very clear understanding!good .

Your voice force me coding. <3

.

Good bro!

82th. Thank you, ma Bro Sensei

amazing.

Thank you.谢谢。

OK finally an explanation of Lambda expressions that I can understand! Thank You Bro!

GOAT.

excellent

thanks bro

So lambdas are when you have 2 classes, one of them with a void method, and the other one with the lambda. The one with the lambda defines what the void method does and calls it?

Thank you Bro!

In the second example how can you just introduce myFrame and never use it? :(
(in public class Main)

Thank you a lot

Bro rocks