Explanation of Java Hello World Program by Deepak (Part 1

Explanation of Java Hello World Program by Deepak (Part 1 - Hindi)

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#java #javatutorials #deepak #smartprogramming
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SIMPLE JAVA HELLO PROGRAM :-
class Abc
{
public static void main(String[] args)
{
System.out.println("hello");
}
}
=======================================
EXPLANATION OF EACH TERM IN ABOVE PROGRAM :
class :
- class is a keyword.
- Java is an object oriented programming and you cannot run your code without
a class in Java. So you need to put your code inside a class.
- In one java program, there can be only single public class.
- Syntax of class :
access-modifier class ClassName
{
//body
}
- If a class has no modifier (the default, also known as package-private), it is visible
only within its own package (you will learn about them in a later episodes)
------
Abc :
- Abc is an Identifier (user-defined class name)
- Class-name should follow the rules of an identifier.
------
public :
- public is access modifier keyword.
- JVM can be installed anywhere i.e. C or D or any other drive and JVM is
responsible to call main method which may be in any other drive, thus to
call main method by JVM from anywhere, “main” method should be declared
public.
-----
static :
- static is keyword.
- At the time of execution there is no object, thus by declaring main method
as static, it becomes class level method (not object level method), so it can
be called without object (JVM class main method). Thus main method
no where related to object.
-----
void :
- void is return type keyword.
- void means nothing or empty.
- main method has void return type as it does not return anything to JVM.
If it returns then what will JVM do with the value, it will be of no use.
------
main() :
- main is predefined method, which is configured inside JVM.
- JVM always start its execution from main method.
-------
String[] args :
- command-line arguments
-------
System :
- Predefined class present in “java.lang” package.
------
out :
- out is a “static variable”of “PrintStream” class present in “System” class.
Three static variables of PrintStram class are :
- out (for output)
- in (for input)
- err (for error)
----------
println() :
- println() is method of PrintStram class.
- Three different methods of PrintStream class to print on console are :
- print()
- println()
- printf()
==
WHAT CHANGES ARE ACCEPTABLE FOR "main()" METHOD :
1. The order of modifiers can be changed, so instead of “public static” we can write
“static public”.
2. We can declare “String[] args” in any acceptable form, which are given below :-
- String[] args
- String []args
- String args[]
3. Instead of “args” we can write any valid java identifier.
4. We can replace “String[] args” with varargs (Variable Arguments) parameter i.e. we can write “String... args”.
5. We can use “final”, “synchronized” and “strictfp” modifiers with main method

Пікірлер: 102

@SmartProgramming Жыл бұрын

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@SumitSharma-og6qp 5 жыл бұрын

Maza agya sir ji... I loved your teaching style..indeep explain wah..wah...supper hit....thanku so much for sharing this type of information.

@SmartProgramming 4 жыл бұрын

Thank you for your feedback. Below are some of the links for more videos and information : Java Tutorials Serial Wise : kzbin.info/aero/PLlhM4lkb2sEhfuXL-2BDrJ67WkUdQ2v9b Website : www.smartprogramming.in Projects & Courses Website : courses.smartprogramming.in Download Our Android Application for Notes and Interview Questions : play.google.com/store/apps/details?id=com.smartprogramming Follow Us On : Facebook Page : facebook.com/smartprogramming.india Instagram Page : instagram.com/smart_programming/

@bhaktiprayag.09 4 жыл бұрын

I am an engineer who never had/learned any language in my engineering. Plus I like bio so, I read books and keep knowledge about it. But I never thought I would be able to learn java coz it's nowhere connected to me. But your videos made it possible. Thanks a ton...

@SmartProgramming 4 жыл бұрын

@DeepakVerma-qk5ox 2 жыл бұрын

C language ki class dalo sir

@hindimotivation4308 4 жыл бұрын

Sir Wrepper class par ek video bnaye plz sir..plz

@SmartProgramming 4 жыл бұрын

Will try to upload soon

@hindimotivation4308 4 жыл бұрын

@@SmartProgramming thankyou sir

@poornimayo6278 3 жыл бұрын

After watching your full java videos i cleared my interview thank you so much for your help keep going

@SmartProgramming 3 жыл бұрын

Glad to hear that. Keep it up. Keep Learning. Thank you for your feedback. Below are some of the links for more videos and information : Java Tutorials Serial Wise : kzbin.info/aero/PLlhM4lkb2sEhfuXL-2BDrJ67WkUdQ2v9b Important Java Books: www.amazon.in/shop/smartprogramming?listId=3OFWAB0091PSQ Website : www.smartprogramming.in Projects & Courses Website : courses.smartprogramming.in Download Our Android Application for Notes and Interview Questions : play.google.com/store/apps/details?id=com.smartprogramming Follow Us On : Amazon Store: www.amazon.in/shop/smartprogramming Facebook Page : facebook.com/smartprogramming.india Instagram Page : instagram.com/smart_programming

@faiyazahmad21 3 жыл бұрын

Sir aap java kaha se sikhe the koi book recommend kijiye java k liye like ur notes

@SmartProgramming 3 жыл бұрын

Go with java black book series: www.amazon.in/shop/smartprogramming through this link. Also, notes are available in our paid course. Paid Course Website: courses.smartprogramming.in/ For more details call or what's app us here: +91-62838-30308

@faiyazahmad21 3 жыл бұрын

@@SmartProgramming java author ka name kya h

@faiyazahmad21 3 жыл бұрын

@@SmartProgramming amazon ka jo link aapne diya h sab aapka recommend h usme se kon sa le le boliye sir

@vaishnaviraut4727 2 жыл бұрын

sir please can u teach salesforce/apex

@SANJEEVKUMAR-wz4rb 18 күн бұрын

Very Informative 😃

@skakramulali6881 Жыл бұрын

thank you very much sir

@notavailable510 4 жыл бұрын

aap aisa sikhate hai ki beech me break lene ka bi man nahi karta..

@SmartProgramming 4 жыл бұрын

Thank you for your feedback. Please subscribe this channel. Below are some of the links for more videos and information : Java Tutorials Serial Wise : kzbin.info/aero/PLlhM4lkb2sEhfuXL-2BDrJ67WkUdQ2v9b Website : www.smartprogramming.in Projects & Courses Website : courses.smartprogramming.in Download Our Android Application for Notes and Interview Questions : play.google.com/store/apps/details?id=com.smartprogramming Follow Us On : Facebook Page : facebook.com/smartprogramming.india Instagram Page : instagram.com/smart_programming

@prashreetiwasti7264 3 жыл бұрын

Thank you sir

@kanchankumar4050 5 жыл бұрын

Hi sir, Advance Java ka v tutorial banayeye

@SmartProgramming 4 жыл бұрын

Sure, Thank you for your feedback. Below are some of the links for more videos and information : Java Tutorials Serial Wise : kzbin.info/aero/PLlhM4lkb2sEhfuXL-2BDrJ67WkUdQ2v9b Website : www.smartprogramming.in Projects & Courses Website : courses.smartprogramming.in Download Our Android Application for Notes and Interview Questions : play.google.com/store/apps/details?id=com.smartprogramming Follow Us On : Facebook Page : facebook.com/smartprogramming.india Instagram Page : instagram.com/smart_programming/

@wafadarabbas8793 5 жыл бұрын

please sir give us a task of program like a question paper its really quit help us to make grip on java

@imhsk1037 5 жыл бұрын

nice explanation sir. but pls explain in English because we don't know hindi. it is bit difficult to understand. and thank you

@SmartProgramming 4 жыл бұрын

@Noname-lu9rd 2 жыл бұрын

sir please provide notes for reading

@ahmadofficial2567 4 жыл бұрын

You are the best sir

@SmartProgramming 4 жыл бұрын

@nitin324 4 жыл бұрын

Hello sir, I have one request regarding to make a complete video of Java Collection. Its very important for me and I shall be very thankful to you.

@SmartProgramming 4 жыл бұрын

As soon as possible

@gopalhatwal7245 4 жыл бұрын

nice

@SmartProgramming 4 жыл бұрын

@namrathanm7411 Жыл бұрын

Why can't a java program have multiple public classes?

@viveksharma9842 6 жыл бұрын

Very helpful

@bhupinderkaur5449 6 жыл бұрын

Good job,can u upload all java tutorial with example...> beginneer to advance java.

@SmartProgramming 6 жыл бұрын

yes, all videos are going to upload very soon 🙂

@kashishtirpathi6148 3 жыл бұрын

Thanku sir for this video 🙏🙏

@SmartProgramming 3 жыл бұрын

Thank you for your feedback. Below are some of the links for more videos and information : Java Tutorials Serial Wise : kzbin.info/aero/PLlhM4lkb2sEhfuXL-2BDrJ67WkUdQ2v9b Important Java Books: www.amazon.in/shop/smartprogramming?listId=3OFWAB0091PSQ Website : www.smartprogramming.in Projects & Courses Website : courses.smartprogramming.in Download Our Android Application for Notes and Interview Questions : play.google.com/store/apps/details?id=com.smartprogramming Follow Us On : Amazon Store: www.amazon.in/shop/smartprogramming Facebook Page : facebook.com/smartprogramming.india Instagram Page : instagram.com/smart_programming

@sumitfitness613 Жыл бұрын

Sir u are really just amazing 🤩🤩 Most easiest way to understand Java Really loved it 🥰🥰

@samankalyan3217 6 жыл бұрын

nycoooo

@rnesolution2673 3 жыл бұрын

Awesome sir

@Bhavya_Aadhya_Kaushiks 3 жыл бұрын

Thank sir Agr mujhse koi java ke liye poochte hn to mai apki videos share kr deti hu sbko😀 Fir sb mujhe thank you kehte hn

@SmartProgramming 3 жыл бұрын

Thank you for your feedback. Keep supporting and keep learning. Below are some of the links for more videos and information : Java Tutorials Serial Wise : kzbin.info/aero/PLlhM4lkb2sEhfuXL-2BDrJ67WkUdQ2v9b Important Java Books: www.amazon.in/shop/smartprogramming?listId=3OFWAB0091PSQ Website : www.smartprogramming.in Projects & Courses Website : courses.smartprogramming.in Download Our Android Application for Notes and Interview Questions : play.google.com/store/apps/details?id=com.smartprogramming Follow Us On : Amazon Store: www.amazon.in/shop/smartprogramming Facebook Page : facebook.com/smartprogramming.india Instagram Page : instagram.com/smart_programming

@hemadtp4072 Жыл бұрын

Sir please teach in english

@SmartProgramming Жыл бұрын

Okay

@nikitanannaware8544 4 жыл бұрын

Thank you sir. Nice explanation sir

@SmartProgramming 4 жыл бұрын

@timepassDeveloper 5 жыл бұрын

Good explanation sir ❤️

@sushmitaroy4239 3 жыл бұрын

You are always awesome sir ji thanks a lot

@premkumarkushwaha5253 6 жыл бұрын

Sir hm "hello" world kaa program kaa object q nhi bnaate hai hm object kese bnaae 9999531535 PAWAN

@SmartProgramming 5 жыл бұрын

this is because main method is static and even out, the reference variable is also static.

@veenuu_sharma 6 жыл бұрын

very helpful & beneficial..

@SmartProgramming 6 жыл бұрын

thank you

@Teach_Coding 4 ай бұрын

You are my inspiration sir 💓

@atharkarim6426 7 ай бұрын

Sir, Really you are amazing teacher ,every indian make good software engineer by follow you and your videos,thaks alottttt .

@qasim88f54 4 жыл бұрын

mashallah aisa maza

@hackerrank6449 2 жыл бұрын

Thank you sir 🙏

@SmartProgramming 2 жыл бұрын

Most welcome

@anshulmodi3997 3 жыл бұрын

Thnku sir for explaining in detail

@SmartProgramming 3 жыл бұрын

@ranjeetpratapsingh6602 5 жыл бұрын

java pe ek project banwa do sir

@SmartProgramming 4 жыл бұрын

If you are willing to create java projects then you may buy our course based on core java with the implementation of 4 projects with 80% discount. courses.smartprogramming.in/

@milindjaiswal4375 3 жыл бұрын

thanku sir .......great explanation

@SmartProgramming 3 жыл бұрын

@sandipkasar5196 3 жыл бұрын

Explain in your word that only single class in Package is public

@Hritikawasthy 6 жыл бұрын

Thanx for the upload this is good one... Keep up the work

@SmartProgramming 6 жыл бұрын

thanks 🙂

@mithleshtiwary9908 3 жыл бұрын

Best teacher..... Each and every video is awesome

@SmartProgramming 3 жыл бұрын

Thank you so much for your feedback. Below are some of the links for more videos and information : Java Tutorials Serial Wise : kzbin.info/aero/PLlhM4lkb2sEhfuXL-2BDrJ67WkUdQ2v9b Important Java Books: www.amazon.in/shop/smartprogramming?listId=3OFWAB0091PSQ Website : www.smartprogramming.in Projects & Courses Website : courses.smartprogramming.in Download Our Android Application for Notes and Interview Questions : play.google.com/store/apps/details?id=com.smartprogramming Follow Us On : Shop With Us: www.amazon.in/shop/smartprogramming Facebook Page : facebook.com/smartprogramming.india Instagram Page : instagram.com/smart_programming

@inamzarkani5536 3 жыл бұрын

I don't have words about your way of teaching❤️

@BhimSingh-dw8fx 6 жыл бұрын

Very nice & helpful sir

@SmartProgramming 6 жыл бұрын

thank you

@rollnroll 3 жыл бұрын

Hlo

@ajaykumar-hr6uk 3 жыл бұрын

Such A great person you are ! Why u dont ask to subscribe and like the videos?

@priyankasaini7125 6 жыл бұрын

very beneficial

@SmartProgramming 6 жыл бұрын

thanks

@pratimatiwari5523 4 жыл бұрын

It's very helpful 😊

@SmartProgramming 4 жыл бұрын

@randomvlogs1047 6 жыл бұрын

gud job sir

@SmartProgramming 6 жыл бұрын

thank you

@zkhan2023 4 жыл бұрын

This is great effort by u sir.

@SmartProgramming 4 жыл бұрын

@kidstv2762 3 жыл бұрын

thanks sir supperb explanantion.

@bhimsingh8041 6 жыл бұрын

Excellent programming

@SmartProgramming 6 жыл бұрын

thank you

@mystatus2464 6 жыл бұрын

sir main method kiss class me difend hai

@SmartProgramming 6 жыл бұрын

main method is put inside any public class and is declared as public,static. Java being being an Object oriented programming language , everything is organized in terms of classes and objects. Also, main method highlights the first class to be executed by JVM. This class needs to be public/without any modifier (i.e. not private) , so that the jvm is able to access it. Also, main method is declared static , so as to access the main method without object creation of that class.