@@beesetti.d.ssubhash5075 if a method in a class is static, you'd need to create an instance of the class "Class1 class = new class()" in order to call the method, however if isn't static, you wouldn't need to to create the "Class1 class = new class()". You can directly call the method by writing Class1.method
Yeah it's the other way around. If it's static, you can (and should) call it directly on the class without creating an object. But if it's not static, you have to create an object and call the method on the object.
The reason why i love this channel is the explanation is just like the way it's needed and basics are at-least a bit clearer than what we know already.
@@kebbil in any course you'll go over classes, methods and arguments, so you should be able to figure out what it does by yourself. Besides, they went over this in my course without even us asking
1. jre calls the public main() 2. static methods in a class can be called without creating an instance of that class. Just call MainMethodExplaination.main() 3. void because does not return anything. 4. String args[] => passing arguments as an input .
havent watched the video yet but: public - the accessor, means the method is accessible in other classes; static - the class doesnt need to be instantiated to be called; void - the return type, it does not return anything; main is of course the name and it takes in command line arguments represented by an array of strings called args
I just started my BA in IT but going towards the coding route with my degree and currently in my first intro to coding class at my university and I thank you for your explanations! This is all super helpful.
Watching your videos bring me the feeling that I could talk to you drinking a beer and learning a lot of coding stuff for HOURS. You're funny and smart, and know properly what you're saying. Amazing
Another clever idea: if it's an array of strings, you can also modify it to an array of integers! It works similarly! Thank you for this excential explanation!!
Glad it helped! When you're first getting started it can be kind of overwhelming and confusing to understand everything that's going on with it, so "just put it in there" isn't terrible advice for your very first program. But after a while it's valuable to be clear why it's all there.
I always hate the "just do it this way" teaching method. You never really know how to work around problems, only a few steps and well.....not all problems fit within those steps. Thanks for the video series on Java, by far the best I've found on YT.
I would like a big o notation lesson on search algorithms! Please discuss the space and time complexities of various algorithms and their most suitable applications!
Hello I have search so many videos on public static void main. But this is the first one that is clearer. You made it lot easier. You have any courses I can take?
Thanks! There's one linked in the description if you're interested. You can see all the content that's included and watch a few lessons free before you buy anything.
The elephant in my text editor has been explained, thanks! I’ve watched a bunch of java youtubers, but you are indeed the most thorough with explaining java concepts!
Great video, when I was taking java at university I felt they had way too many analogies, that by the end of them I was just confused and bored, and didn't answer stuff like this fully glad to heard a nice clear explanation instead of something like "you'll learn that later"
Starting with Java 21, the days when we have to stop enthusiastic beginners from asking questions about 'public static void main(String[] args)' because it's simply too advanced for a first lesson, are finally over. Nevertheless, great explanations, keep going!
Hey John, you are providing a great educational value. Your videos always help to clear my doubts and understand the basics of Java. Keep it up. Thanks a lot.
Hello John, I really like the way you teach. Absolutely great!!! On similar lines to this video, students most of the time also think about the real stuff behind System.out.println(). Can you create a video explaining each part - What is System, out, println? Also the static nature of out and thus it can be used on top of the System class directly instead of an object. Cheers
Imagine you’re baking a cake: So, public static void main(String[] args) means: public: Anyone can use this recipe. static: You don't need to make a whole cake to read the recipe. void: The recipe itself doesn't give you cake. main: This is the name of the recipe. (String[] args): This part is like optional ingredients that you might add to the recipe.
Thank you for sharing, I was hopping you can explain it better than others, can you try to explain it with example for a beginners that we can understand it easily.
This is a very fun and easy to understand explanation. I'm not even a java developer (learning c#) but I understood it perfectly. I've noticed java and c# share similar syntax tho.
Hi John !!! I have been following you and watching alllll of your Java tutorials all the time would love to meet one day if you are anywhere near east coast !! I realized in this video though you are very quiet 😊 are you trying to to not wake someone up at home ??!! 😛 you are great thank you so much for al the useful info ! I hope the best for you
Do u have a video that teach about java command and show what the behind scene of the command working ? .and may be about maven and gradle that would be great too.
Interestingly, the designers of Java could have opted to return an int from the main method (instead of void) to indicate to the OS the state the program completed in e.g. success, failure etc.. You can actually specify such an int when you call System.exit to exit the program.
hahaha! I had a really good chuckle, those first 30 seconds. "Don't ask! shut up, no don't! stop. Just do it, put it in there!" I was on the receiving end of that. Art imitates life, right?
"It's kind of like saying hey I'm a great program and the JRE goes 'great how can I run you'? and he's like you can't. Only I can run me." "and that's a pretty useless program". This statement while maybe not intended to be interpreted nor regarded in this way is full of wisdom not only in regards to coding but when applied to life in general, lol🤣. 10/10. Just wanted to point that out. Thank you for all the vids John, you're helping me a lot.
Hi John, I've one doubt Can we use (Object[ ] args) instead of ( String [ ] args) in main method. If we execute that program by add Object[] will not give output, why? 😅
a doubt there is static main which means it isnt a static block it is a static method .static methods just get loaded when they are called not executed on the other hand static blocks loads plus executes. so would u say it would be wise to use public void main(string args); and then static { //code }
Hello, John! How does one delimit the arguments args[x], one from another? How does one count the arguments? I expect there is a method to do just that. Nice explanation. Many thanks.
I think that this style of explanation - starting from the absolute bottom first, explaining all this st*pid keywords (of this alien language ;) - is the best appraoch you can have. Even if it takes some minutes longer, it will clear out some questions that every newbie has at the beginning. [even better would be some history on WHY this or that keyword had to be invented...] Thanks man.
one question, if you don't intend on passing arguments for that array of strings can't I just not put them and say "public static void main( ) { }"? because they would be of no use to me, main would never recibe said parameters so why have them there as if there was going to be something eventually
That's actually the first thing any Java crash course tutorial should explain, but instead they just say: "That's the way it is". SMH... Anyways, amazing video as always. 👏👏👏👏
For whatever reason I have struggled with really understanding "static" and you just cleared it up for me. Thanks, John!
Can you please explain with an example.
😊
@@beesetti.d.ssubhash5075 if a method in a class is static, you'd need to create an instance of the class "Class1 class = new class()" in order to call the method, however if isn't static, you wouldn't need to to create the "Class1 class = new class()". You can directly call the method by writing Class1.method
does this make sense?
@@jumpz5561
Or is it the other way round
Yeah it's the other way around. If it's static, you can (and should) call it directly on the class without creating an object. But if it's not static, you have to create an object and call the method on the object.
the scenario at the beginning was LITERALLY MY EXPERIENCE. tysm
You seriously deserve more subscribers. You are an amazing teacher, thank you John
Yes, that's why I told all of my classmates about John. We call him "Java John"
The reason why i love this channel is the explanation is just like the way it's needed and basics are at-least a bit clearer than what we know already.
helloJohn, sometimes I’m having a language barriers but when you explain I don’t feel that. I appreciate it great explanation.
0:23 no one quite says that. They just say they’ll discuss it later. Lol but you are such a good teacher. Happy I found you!
and never do
@@kebbil in any course you'll go over classes, methods and arguments, so you should be able to figure out what it does by yourself. Besides, they went over this in my course without even us asking
thats what your wife says the first time you are having sex with her
well ur lucky if they do.My teacher didnt say anything,she just said thats a default in java.So it really depends on the kinda teacher u hav
It's quite straightforward once you get into the language. Initially, they give a vague definition so you can go on with the learning.
You are so enthusiastic when you teach. thanks for the lesson,it was easy to understand
Very glad to hear that, thanks for watching!
It feels good , when you already know all these stuff and still watching this complete video 🤗
1. jre calls the public main()
2. static methods in a class can be called without creating an instance of that class. Just call MainMethodExplaination.main()
3. void because does not return anything.
4. String args[] => passing arguments as an input .
havent watched the video yet but: public - the accessor, means the method is accessible in other classes; static - the class doesnt need to be instantiated to be called; void - the return type, it does not return anything; main is of course the name and it takes in command line arguments represented by an array of strings called args
I just started my BA in IT but going towards the coding route with my degree and currently in my first intro to coding class at my university and I thank you for your explanations! This is all super helpful.
man i just stumbled upon your channel and im simply blown away by the quality of your content, it's gold
Three years later, i've "super appreciated" your video ! Thx 🤩
Thank you so much!
Watching your videos bring me the feeling that I could talk to you drinking a beer and learning a lot of coding stuff for HOURS. You're funny and smart, and know properly what you're saying. Amazing
Thank you for explaining public static void main and how to use that args array!
Finally, a clear, succinct, and helpful explanation!
Glad it was helpful!
Might be good to note that those main args are typically used for advanced configuration options.
Another clever idea: if it's an array of strings, you can also modify it to an array of integers! It works similarly!
Thank you for this excential explanation!!
Top 2 Teachers in You tube.
The Cherno, Coding with John
Thank you John!!
THANKS A LOT! People just saying "just copy this" was driving me nuts.
Glad it helped! When you're first getting started it can be kind of overwhelming and confusing to understand everything that's going on with it, so "just put it in there" isn't terrible advice for your very first program. But after a while it's valuable to be clear why it's all there.
I don't wanna underrate any of your other videos but this one (especially the introduction) really got me insanely immersed
Neither college teachers nor the textbooks ever explained what args do. Thanks for the clear explanation.
Interesting, thx. Btw, the word “main” is inherited from C language. main function is entrance point in C.
the
int main{} thingy?
I always hate the "just do it this way" teaching method. You never really know how to work around problems, only a few steps and well.....not all problems fit within those steps. Thanks for the video series on Java, by far the best I've found on YT.
I would like a big o notation lesson on search algorithms! Please discuss the space and time complexities of various algorithms and their most suitable applications!
this is my favorite channel for clearing up Java concepts, thank you so much John
Hello
I have search so many videos on public static void main. But this is the first one that is clearer. You made it lot easier. You have any courses I can take?
Thanks! There's one linked in the description if you're interested. You can see all the content that's included and watch a few lessons free before you buy anything.
@@CodingWithJohn I already code but I get confused on how to start
This was very helpful....I just started learning Java last night (I was a JavaScript guy) and this really cleared things up! Gracias!!
My mind always asks me 'why' and when I can't get the answers my learning shuts down, thank you for this explanation!
thanks john im a 7th grader trying to learn java this video helped out a lot thanks
I'm studying for my theory final in a couple days and you're helping me tremendously
The elephant in my text editor has been explained, thanks! I’ve watched a bunch of java youtubers, but you are indeed the most thorough with explaining java concepts!
Great video, when I was taking java at university I felt they had way too many analogies, that by the end of them I was just confused and bored, and didn't answer stuff like this fully
glad to heard a nice clear explanation instead of something like "you'll learn that later"
It would be awesome if you could do a video just on the static keyword. Why would you use it besides in the main method and stuff.
Thanks so much bro. This honestly helped so much. Walking away a little more confident 👍
Starting with Java 21, the days when we have to stop enthusiastic beginners from asking questions about 'public static void main(String[] args)' because it's simply too advanced for a first lesson, are finally over. Nevertheless, great explanations, keep going!
yours the first channel i subscribed after watching many others.. you are just too good to be on you tube. I love your videos.
Hey John, you are providing a great educational value. Your videos always help to clear my doubts and understand the basics of Java. Keep it up. Thanks a lot.
Java:
class MainClass {
public static void main (String [] args) {
System.out.println("Hello World");
}
}
Python:
print("hello world")
omg...bro is better teacher than all my professors combined lol GREAT VIDEO!
I started watching your videos yesterday and I am subscribed now, very interesting explanations!
Hello John, I really like the way you teach. Absolutely great!!!
On similar lines to this video, students most of the time also think about the real stuff behind System.out.println(). Can you create a video explaining each part - What is System, out, println? Also the static nature of out and thus it can be used on top of the System class directly instead of an object.
Cheers
The bottom line is use the "main " as it is... it was amazing.
Yep, just use it as it is. But it's good to know why it is how it is!
“Args” is actually the sound I make trying to understand computer language
Imagine you’re baking a cake:
So, public static void main(String[] args) means:
public: Anyone can use this recipe.
static: You don't need to make a whole cake to read the recipe.
void: The recipe itself doesn't give you cake.
main: This is the name of the recipe.
(String[] args): This part is like optional ingredients that you might add to the recipe.
Extremely useful! Congratz John.
Wow, Never knew what it means. Super simple explaination
bro this video made me subscribe without any hesitations ...... l like the way you started your video
Thanks for this. Nicely done. One question I have is can you think of a realistic use case for assigning value to the String[] args array?
Thanks for the video! Great stuff man
After al those hours searching for explanations this is the only video I found helpful and entertaining!
Keep it up!
If you could, please add to this about having multiple arguments rather than just one.
Thank you for sharing, I was hopping you can explain it better than others, can you try to explain it with example for a beginners that we can understand it easily.
Haven't seen the video yet... But that's exactly what I asked yeaaars ago trying to do C#
I never progressed.
Way to clearly explain things. Thank you. 👍
Thank you a lot❤❤ you are really helpful and you are very understandable
Man. I have to tell your channel to my classmates, coz I'm having trouble explaining Java to them.
Great video! Though I've got one question left. How do I pass multiple arguments (so that the args array contains more than one string)?
This is a very fun and easy to understand explanation. I'm not even a java developer (learning c#) but I understood it perfectly. I've noticed java and c# share similar syntax tho.
Could you please make a video explaining each part of System.out.println()? Thank you
It's a method called println(), which is part of the *out* field in the System class. "Out" in this case is an instance of PrintStream.
Hi John !!! I have been following you and watching alllll of your Java tutorials all the time would love to meet one day if you are anywhere near east coast !! I realized in this video though you are very quiet 😊 are you trying to to not wake someone up at home ??!! 😛 you are great thank you so much for al the useful info ! I hope the best for you
Thank you. It is useful for interview
Thank you for this. I was always wondering what it all did and I could never geta good answer.
John you are absolutely legend
The story in the beginning is so accurate
This was a video I was always looking for when I was a beginner, thanks 🙏
Do u have a video that teach about java command and show what the behind scene of the command working ? .and may be about maven and gradle that would be great too.
Interestingly, the designers of Java could have opted to return an int from the main method (instead of void) to indicate to the OS the state the program completed in e.g. success, failure etc.. You can actually specify such an int when you call System.exit to exit the program.
I was wondering about that. I've been learning a lot of C lately and having your main function return an exit code seems to be the standard there.
It does return a code based on the success in Intellij IDEA I haven't tried in other IDEs so idk about others
Hello, Sir! We'd all really appreciate if you break down SOLID on this channel, especially LSP🙏🙏🙏
Your explanations are amazing. Keep up the good work. Wish you all the best ❤
Yep.... that was my teacher, like:" no more questions" :-/
Thank you for this great video. :D
hahaha! I had a really good chuckle, those first 30 seconds.
"Don't ask! shut up, no don't! stop. Just do it, put it in there!"
I was on the receiving end of that. Art imitates life, right?
Great and simple video! Congrats and thanks
Amazing explanation, thank u so much!
Unlucky for them or those then. Our good prof (but can be mean sometimes) explains it. And I think the very first thing also.
"It's kind of like saying hey I'm a great program and the JRE goes 'great how can I run you'? and he's like you can't. Only I can run me." "and that's a pretty useless program".
This statement while maybe not intended to be interpreted nor regarded in this way is full of wisdom not only in regards to coding but when applied to life in general, lol🤣. 10/10. Just wanted to point that out. Thank you for all the vids John, you're helping me a lot.
Philosophy with John
Hi John, I've one doubt
Can we use (Object[ ] args) instead of ( String [ ] args) in main method.
If we execute that program by add Object[] will not give output, why? 😅
This was very helpful, thank you
a doubt
there is static main which means it isnt a static block it is a static method .static methods just get loaded when they are called not executed on the other hand static blocks loads plus executes. so would u say it would be wise to use
public void main(string args);
and then static
{
//code
}
Sir please upload some on spring boot course
Can you do a series on backtracking and dynamic programming
Definitely demystified a lot of things for me here! Super useful vid for me who is learning Java coming from python :-)
Mee too, coming to Java from Python. 😊
Initially, I would do a lot of comparison between the two.
Thank you so much for the video 🙏🙏🙏
A must like from me for all of your videos.
Thank you John for the video.
Great explanation sir
you are amazing teacher! Thank you
Hello, John!
How does one delimit the arguments args[x], one from another? How does one count the arguments? I expect there is a method to do just that.
Nice explanation. Many thanks.
I think that this style of explanation -
starting from the absolute bottom first, explaining all this st*pid keywords (of this alien language ;) -
is the best appraoch you can have.
Even if it takes some minutes longer,
it will clear out some questions that every newbie has at the beginning.
[even better would be some history on WHY this or that keyword had to be invented...]
Thanks man.
Thanks for your explanation..
Is there a library equivalent to Python's argparse?
one question, if you don't intend on passing arguments for that array of strings can't I just not put them and say "public static void main( ) {
}"? because they would be of no use to me, main would never recibe said parameters so why have them there as if there was going to be something eventually
Can you do a tutorial about downloading java
your videos are awesome!! Thanks a lot for sharing
Perfect John, please upload design pattern serie in JAVA.
That's actually the first thing any Java crash course tutorial should explain, but instead they just say: "That's the way it is". SMH... Anyways, amazing video as always. 👏👏👏👏
0:00 Yup that "somebody" is my Teacher.
English? Jre? Instance? Method? What is static like? Sits still? What if I wanted #s, not strings?
you really though he would explain every single part of OOP in Java in this video? it would take literally 4-5 hours
Hmmmm, I love chimichanga and my favorite place to eat that is at this joint by Prairie View, TX.
Ahh I live nowhere near there but will have to check it out
@@CodingWithJohn if you ever happen to be in TX let me know. I can show you a few spots and I got you for chimichanga.