How System.out.println() Works Internally in Java? || Java Interview Question || Naveen

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#CoreJavaInterview #Java #NaveenAutomationLabs
In this video, I have explained How System.out.println() Works Internally in Java?
What is #JNI code
What is out variable
What is println() method
What is PrintStream class in Java
Can we create the object of System class
Refer this JDK 9 official documentation for System.c file:
hg.openjdk.java...
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Опубликовано:

5 окт 2024

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Комментарии : 77

@saravanankaliyamoorthy9479 3 года назад

This is the first time I'm seeing JNI related details. Really useful. Thanks brother

@skamirullah 3 года назад

Never thought about it in-depth. Thank you so much Naveen for the detailed explanation. Kudos to your efforts and unique content.

@intrestingfacts6785 3 года назад

Your channel is my daily routine... I learn something new everyday. Thanks for nice explanation

@naveenautomationlabs 3 года назад

My pleasure 😊

@bhagbatinayak8296 2 года назад

I was searching for this answer from a long time and finally got the clarity. Thank you so much Naveen.

@rockyrajeshyt6658 3 года назад

Always interesting things comes from your channel sir thank you Naveen sir

@mustapharaimilawal8053 2 года назад

Thank you for making this in-depth exposition of this topic, you really clarified all the obscure aspects of this topic. Thank you so much.

@demystifyselenium3055 3 года назад

Hi Naveen.. Variable "out" here is declared as public static final PrintStream out = null ; 1. Generally when we use final keyword, variables becomes constant (i.e, We cannot change it), but here we are updating variable using setOut0 native method.. Please clarify on this query.. 2. Why should we use native method,rather than that we can develop a java method and use it right? Please confirm us if it was used for the purpose of reusability.. TIA.. Thanks for all your efforts from the QA community.. It's nonpareil 😊👍🏻 May the force be with you 👍🏻

@naveenautomationlabs 3 года назад

Hi, 1. We are not updating the final out variable, it's just getting initialized from the native method call by jvm. 2. They could have written the java code for that, but in java there are few concepts which are taken from C in the form of native support.

@dystopianNinja1289 3 года назад

This is so deep and insightful! Thank you so much

@kalavaidya 3 года назад

Awesome! Very useful to know. Such detailed explanation are found nowhere else. Thank you so much.

@lopamudradash4555 3 года назад

Many thanks Naveen for explaining in depth..really helps alot to understand the internal structure

@anujshrigiriwar2901 3 года назад

Hi, Naveen thanks for excellent teaching through your videos. I wish to request if you can make videos on Java documentation that would be helpful. For any automation engineer or software developer documentation plays a very important role. Please help us educate on it. Thanks

@naveenautomationlabs 3 года назад

Sure will do that :)

@suryavegi3689 3 года назад

Hi Naveen Sir, “out” is by default a final variable, so how is it possible to override the final variable in java? Please clarify it

@gayus7443 Год назад

we are not overriding it, we are reinitializing it. Final variables can be reinitialized.

@pavankumarvedantham7753 3 года назад

Hi Naveen. Have been following your articles and I loved it. Want to know how to prepare hacker rank for automation. Kindly let me know. Thanks.

@sushilk5349 3 года назад

Very good information, Thank You So Much Naveenji.

@munich-germanylife8207 3 года назад

Cleared with all my doubt , Thanks

@udaypandey5659 3 года назад

2nd part of this question was interesting !!

@naveenautomationlabs 3 года назад

yes it is :)

@atiqgee 2 года назад

Brilliant Naveen!! Really grateful for all this explanation.

@praveenkalepu2952 3 года назад

Really helpful for the students from BSC like me 🙏🙏🙏 ❤️❤️❤️ Thank u so much sir 🙏

@ankitmahajan8295 3 года назад

You are the same guy who said bullshit in the last live video? grow up and mind your language when you talk to your seniors like naveen and elders. this will help you when you work in a company.

@praveenkalepu2952 3 года назад

@@ankitmahajan8295 That's why I realised and said sry bro and even u don't know my scenario as I lost my super chat twice and after that I've done another super chat and sir didn't even picked that one so in that mood I've done like that I hope you understand my mistake

@lokeshsharma-gd1xo 3 года назад

Hello Naveen, Plz start a next series on Java stream, immutable array, now a days lot of companies asking same question

@AshishKumar-tz3rp 3 года назад

Such a depth explanation very nice 👍

@naveenautomationlabs 3 года назад

Glad it was helpful!

@nurlanshukurlu 3 года назад

Great topic to discuss with friends . Thanks Naveen

@naveenautomationlabs 3 года назад

Always welcome

@CharanDrafts 3 года назад

You nailed it Naveen sir🤩👍

@ashuiet 3 года назад

Really deeply explained.

@udayshankarusa 3 года назад

Hi Naveen, Thanks for the good explanation. I need small clarification here. While executing the c program which compiler has been used? As I know c files will be executed in gcc compiler. That means inside jvm is there any gcc compiler available? Can you clarify on this. Just for curiosity am asking.

@naveenautomationlabs 3 года назад

Using JNI a java program has the capability to call the native C code. Java native interface (JNI) is a framework provided by java that enables java programs to call native code and vice-versa.

@mauryar16 3 года назад

Thnx for this ....Even I was thinking same

@mohanreddymutra1756 3 года назад

Good knowledge. Thanks

@sameerkadgaye2048 3 года назад

Thank you so much sir 🙏🙏 very nice explained

@naveenautomationlabs 3 года назад

Most welcome

@iftyahmed1690 3 года назад

Helpful information.

@sridharlanka2721 3 года назад

out is an Static variable which is declared in System class and is of type - PrintStream if out is a static variable , then how come an variable can access method ? ============================================================= Here "out" doesn't call a method : out is a variable which is actually holding an reference to an object (and the object here is an instance of PrintStream Class) on which you can call a method.(println())

@rakeshpatil937 3 года назад

Very useful and deeply explained 👍

@naveenautomationlabs 3 года назад

Glad it was helpful!

@snehaparekh8502 3 года назад

It was way to deep snd detailed.. 🙂👍🙏

@naveenautomationlabs 3 года назад

glad that it helped you :)

@SenthilKumar-fo6kq 4 месяца назад

@naveenautomationlabs Why can't we create an object of printstream class and access println method? Please explain

@mauryar16 3 года назад

Hi Naveen, Can you plz explain driver.switchTo().alert().accept(); in same manner??

@shivamkadu5010 3 года назад

Important 🙏

@Iam_namangupta 3 года назад

Great one Naveen

@kumaranthiru203 3 года назад

Thanks naveen

@sumitgoyal385 Год назад

thanku very nice lecture

@akashdiware1583 3 года назад

It means that JNI can manipulate variables the way it wants inspite of setting it as final?

@hariprasad-hz3pk 3 года назад

That's Helpful :) Thanks a Ton @naveen

@albertosoto4280 Год назад

I have a doubt. With which value out method gets inicialized? If it is a reference... a reference to what?

@jatinsharma3792 2 года назад

I have one question what actually happens when you try to link 2d aray in inside main(String [ ] [ ] ?

@samarohochattopadhyay7407 8 месяцев назад

instead of using the system class why don't we directly use the PrintStream class for using the println method?

@vikrantharne9345 3 года назад

in which scenario value of final variable can be changed?

@abhisheksinha3119 3 года назад

Why we are directly not using PrintStream instead of System.out to print something?

@syedmuneebali8540 3 года назад

very informative!

@santoshram1241 Год назад

Thanks brother

@sagarsapkota8415 Год назад

when out=null is passed to native method setout0(printstream out) then what is happening ?

@anshupanda2149 3 года назад

Hi Naveen , What's the diff btn System.out & System.err ,When ever we refer to any blog we get only one ans i.e. err is used to promot the error msg to the console ,nd out for General output. What's ur takes on this .Any in-depth ans can I get it or even a video will be also fi9 .

@sivaramapandian3923 3 года назад

kindly start python series

@sanskarsharma5061 3 года назад

sir plz guide mera college me subject b.com the or me software testing ka course kar raha hu to kya IT company me job lagne ke chance he kya?

@shasankkumar7246 3 года назад

what about printf and print

@pa1gupta 3 года назад

Not clear about how JVM internally calls setOut method.

@crickettales6594 3 года назад

👍👍

@sssaamm29988 3 года назад

I couldnt get the statement ,when the class is loaded static variables are initialised.i know that when a class is loaded into memory static block is executed.can someone explain me this concept of initialising the static variables at time of class loading.

@ayushgupta8239 3 года назад

The concept is same as it is for static block and main method.

@naveenautomationlabs 3 года назад

Loading (loads the required class/jar files), Linking (assigning references and verification) and Initialization (initializing static variable and execution of static block )

@deeptisharma9154 5 месяцев назад

pl give my interview......

@wanderingsalar7872 3 года назад

Is your paid-course up-to-date since 2020? Asked this question on your website and Facebook group but never got a reply. Please reply here. Thanks a ton! Love what you're doing and so much appreciate your help!

@naveenautomationlabs 3 года назад

Course is always up to date. Whenever there is a new concept, it's updated with the latest content. It's up to date with 2021 content.

@naveenautomationlabs 3 года назад

Please mail ur questions here at naveenanimation20@gmail.com

@wanderingsalar7872 3 года назад

@@naveenautomationlabs please check your email - thank you!