Java File I/O (Reading & Writing)

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  • เผยแพร่เมื่อ 2 ม.ค. 2025

ความคิดเห็น • 128

  • @KeepOnCoding
    @KeepOnCoding  ปีที่แล้ว +1

    ☕Want to master Java? Get my complete Java course: bit.ly/42mQlXE

  • @ianpan0102
    @ianpan0102 4 ปีที่แล้ว +47

    I was planning on refreshing my memory on Java and found your playlist -- best thing I've come across this week!

  • @mycodegist4258
    @mycodegist4258 4 ปีที่แล้ว +63

    Your video quality is top notch.
    The sound is crispy clear too
    Keep up the good work, this video was helpful!
    Cheers!

  • @christler801
    @christler801 4 ปีที่แล้ว +27

    Good stuff! I am learning Java now and just got through the File I/O section.
    Last week I was learning exception handling when your video on that came up.
    Keep it up

  • @ErionMaxhari
    @ErionMaxhari 4 ปีที่แล้ว +8

    I am learning Java since a year now, and this is the best channel across youtube.

  • @itheblackwolfofmyfamily
    @itheblackwolfofmyfamily 4 ปีที่แล้ว +8

    We can also have try with resources because the bufferewriter will be closed automatically. This is good because we may forget to close the bufferwriter.

  • @christophernoble8284
    @christophernoble8284 3 ปีที่แล้ว +2

    This is a great video. Voice tone, editing, it's perfect man thank you.

  • @vighnesh93
    @vighnesh93 4 ปีที่แล้ว +4

    Really really helpful. Loved the clarity and simplicity of your content. Please keep posting 🙌🏼

  • @Dav95id
    @Dav95id 3 ปีที่แล้ว +2

    Bro! I thought i was gonna freak out because of my university excercises, but now I am laughing because you showed me how frickin' easy this is :D Thank you so much!

  • @greynade
    @greynade 4 ปีที่แล้ว +2

    Expecting you to reach 100k soon!
    Please keep making such short and specific videos.
    Maybe a video on CUSTOM THEMES ? like "Custom Dark Theme" , "Default Night Mode" , Custom Brand Color Theme" , etc!
    Would love a such video

  • @JLSXMK8
    @JLSXMK8 4 ปีที่แล้ว +1

    I love how you added in a way to copy files instead of just doing a "hey, we're gonna write to a file."; That technique can be VERY handy in case of accidental deletion of a file.

  • @marissawebb7671
    @marissawebb7671 3 ปีที่แล้ว +1

    I'm taking Java now and I'm so thankful for this video!

  • @kevser176
    @kevser176 ปีที่แล้ว

    that was the most useful video about file i/o on youtube for me. thanks
    maaan

  • @csongorcsizmadia6765
    @csongorcsizmadia6765 3 ปีที่แล้ว

    thank you so much! They didn't really explain this at the java lecture, so your video was very helpful!

  • @gothfrog69
    @gothfrog69 2 ปีที่แล้ว

    Clear and concise example of file reader/writer. Thank you.

  • @sollee245
    @sollee245 3 ปีที่แล้ว +1

    how easy this video is!!! Thankyou for sweet explanation XD

  • @nicolapetkovic7910
    @nicolapetkovic7910 4 ปีที่แล้ว

    I've found this video useful because you give a solution to a common problem by easy and clear way

  • @lilasian3877
    @lilasian3877 3 ปีที่แล้ว

    Great video man! Keep up the good work

  • @leanobajio
    @leanobajio 4 ปีที่แล้ว +5

    Hey! Awesome video! Could you do a video about your environment setup for coding in java. What IDE do you use/prefer? Maven or Gradle? etc.

  • @draculaoppa834
    @draculaoppa834 4 ปีที่แล้ว +19

    Never put blank or return; in catch block when you use try-catch. You can't know where the error has occured when the project is too large. That's the bad practice!

    • @giangnguyenbang8073
      @giangnguyenbang8073 3 ปีที่แล้ว +1

      he is demo :3 calm :3

    • @thatoneuser8600
      @thatoneuser8600 3 ปีที่แล้ว +5

      @@giangnguyenbang8073 If you're teaching to newbies-such as in this video-, then that is a profoundly horrible excuse.

    • @DueSouthWests
      @DueSouthWests 3 ปีที่แล้ว

      So is someone gonna give an example for what a beginner should wright? Like I would really like to know as a beginner.

    • @draculaoppa834
      @draculaoppa834 3 ปีที่แล้ว

      @@DueSouthWests What I said (Knowing the consequences!) is what all beginners should know about!!! Just listen to understand but not to reply.

  • @isadorasantos2442
    @isadorasantos2442 3 ปีที่แล้ว

    Thank you so much for this video. Helped me a lot with my assignment!

  • @ahmadasfour6715
    @ahmadasfour6715 3 ปีที่แล้ว

    Really good as it is to the point and you were easy to understand. Thanks.

  • @westonpeabody8010
    @westonpeabody8010 3 ปีที่แล้ว +3

    Just wondering how you learned Java. I've been kinda self learning for a while. Took a break and I'm kinda having a hard time wrapping my head around some things

  • @sanchitlodha5770
    @sanchitlodha5770 4 ปีที่แล้ว

    Thank you for getting me started on java io

  • @salmali9039
    @salmali9039 ปีที่แล้ว

    Do you can solve this:
    Build Application that has three classes (three user data types). Every class has
    some of attributes and methods to manipulate the objects of these classes.
    The objects and their data can be saved permanently into Files. Every class have
    to save in three forms of files:
    1. Object Stream.
    2. Data Stream.
    3. Random Access File Stream.
    Data can be brought mainly from csv file. Every record consists of multiple fields,
    and every line has only one record.

  • @alainj490
    @alainj490 2 ปีที่แล้ว

    Very clear, now I understand. Thank you so much!

  • @elmir.ahadov
    @elmir.ahadov 4 ปีที่แล้ว +3

    Can you please discuss how to find jobs as a Java developer (assuming 0 experience)?

    • @pooblock4092
      @pooblock4092 3 ปีที่แล้ว

      intern jobs or junior dev jobs for the government are easy to get. Depending on where you live the government is looking for lots of people as developers. It's a great place to start.

  • @sekoubasillahcamara5791
    @sekoubasillahcamara5791 2 ปีที่แล้ว

    Damn you made this look very easy. Thanks mate

  • @33_sorin
    @33_sorin 4 ปีที่แล้ว +5

    good quality video, thank you.
    the only things i would've liked added are how to use bufferedwriter without overwriting the current state of the text file, and how to create a text file just inside the project folder in case it needs to be moved between pcs
    both of which probably have easy to find solutions online though, so it isnt an issue
    edit:
    to anyone with the same questions, you can append instead of overwriting by adding true as a parameter in FileWriter: FileWriter("path", true)
    and you can write to a file inside the project folder by just typing the file name without a path, like FileWriter("textfile.txt")

    • @ezequielschmit
      @ezequielschmit 3 ปีที่แล้ว

      Thanks a lot man, it was very helpful

    • @33_sorin
      @33_sorin 3 ปีที่แล้ว +1

      @@ezequielschmit glad it helped

  • @maddy3656
    @maddy3656 4 ปีที่แล้ว +1

    Great video. Thank you! 🙌🏾

  • @Allen-pj7nw
    @Allen-pj7nw ปีที่แล้ว +1

    Your setup is cool

  • @djebelqaf5217
    @djebelqaf5217 3 ปีที่แล้ว +1

    Thanks for the video, i sleep early tonight

  • @yadigaryusifov1279
    @yadigaryusifov1279 3 ปีที่แล้ว

    Thanks for the great explanation.

  • @giacomomosele2221
    @giacomomosele2221 3 ปีที่แล้ว

    I need this for an application to write its log to a file. Thank you so much!

  • @manthanavhad9
    @manthanavhad9 2 ปีที่แล้ว +1

    Which application have you used for programming in this video?

  • @ahsaniqbal4122
    @ahsaniqbal4122 3 ปีที่แล้ว

    My men love u, U have explained it beautifully.

  • @harshalkotkar4531
    @harshalkotkar4531 ปีที่แล้ว

    Just amazing in easiest way, thank you 👍

  • @trafalgarGR
    @trafalgarGR 3 ปีที่แล้ว +1

    Thank you sir! If I want for example couple of users to enter their Names how not to override the first name with the second name, etc etc?

  • @kalashacharya9821
    @kalashacharya9821 4 ปีที่แล้ว

    The code of #2:46 gave the error.
    Instead, I have to modify the code as below to run without error.
    Can anyone explain to me why?
    import java.io.*;
    class Main {
    public static void main(String[] args) {
    try {
    BufferedWriter bw = new BufferedWriter(new FileWriter("F:\\JAVA\\InputOutput\\output.txt"));
    bw.write("karen");
    bw.write("\t chad");
    bw.write("\t becky");
    bw.close();
    }
    catch(Exception e) {
    return;
    }
    }
    }

    • @thatoneuser8600
      @thatoneuser8600 3 ปีที่แล้ว

      Maybe you wrote the absolute path starting at the F drive rather than the C drive?

  • @hafsahmr9010
    @hafsahmr9010 4 ปีที่แล้ว

    Easy to follow. Great content.

  • @zozowrites4467
    @zozowrites4467 ปีที่แล้ว

    Thanks, was really helpful!😀

  • @guyteigh3375
    @guyteigh3375 ปีที่แล้ว

    Helpful thank you. Is there a (simple) way to ADD to a file (eg a logfile) using this approach, rather than have it just overwrite each time. I realise there are other ways it can be done, but this seemed simpler than most of the ways I have foiund so far - hence wondering if there was an option / switch / parameter to say "dont overwrite, just append this on to it".
    Many thanks.

  • @hernandezmartinezfamily8005
    @hernandezmartinezfamily8005 3 ปีที่แล้ว

    Man you are my hero

  • @sebastienroux1790
    @sebastienroux1790 2 ปีที่แล้ว

    Id love to see how you handle server side receiving post requests from a video upload.

  • @DrSaav-my5ym
    @DrSaav-my5ym 2 ปีที่แล้ว

    I typed exactly what you typed here and I got an error "fileName cannot be resolved to a variable"

  • @JuanCruz-iu9ul
    @JuanCruz-iu9ul 3 ปีที่แล้ว

    When My mentor told me we were doing FILE i/o i was kinda scared lmao but it is way easier that what I thought

  • @UyenNguyen-m1m
    @UyenNguyen-m1m ปีที่แล้ว

    Hi, may u answer my question, I am just curious about the try catch parts, what do it gonna do? also why do we have to handle that exception as well as what will happen if we just dont handle the exception?

  • @maxd7228
    @maxd7228 4 ปีที่แล้ว

    Need More Java content. Great how-to 👍

  • @jaylordjl6337
    @jaylordjl6337 2 ปีที่แล้ว

    Thankyou sir please post more file Handling

  • @monstergamers653
    @monstergamers653 2 ปีที่แล้ว

    how do I send it to a folder that no one else will likely have? I tried making a folder in my C: drive to send it to but no one else will likely have that folder.

  • @JJJJ-gl2uf
    @JJJJ-gl2uf ปีที่แล้ว

    Great video. Many thanks.

  • @alisherry2932
    @alisherry2932 2 ปีที่แล้ว

    What we should do if we need to edit some information in the saved file without losing the other data?

  • @CashmereMercenary
    @CashmereMercenary 3 ปีที่แล้ว

    nice, thanks for that. However i tried reading from some an excel i created earlier with various columns and rows but i just a lot of binary among other characters. i initially read and wrote to .xls instead of the .txt which worked fine. any ideas?

  • @askin_guy4652
    @askin_guy4652 3 ปีที่แล้ว

    so buffered readers and writers are restricted to only one functionality (method)?

  • @amalalmuarik5160
    @amalalmuarik5160 2 ปีที่แล้ว

    i don't get why do we need to open a file and write on it are we writing on outer file not ours or my own file
    ?

  • @nishantjasra5291
    @nishantjasra5291 2 ปีที่แล้ว

    It Created the file and wrote too, but unable to read the code in IDE by second code

  • @Roger-we3co
    @Roger-we3co 4 ปีที่แล้ว

    thank you coach!

  • @yadigaryusifov1279
    @yadigaryusifov1279 3 ปีที่แล้ว

    when I wrote backslash, it did not create a new line. Could you clarify me on this problem?

  • @amolsushir3198
    @amolsushir3198 2 ปีที่แล้ว

    Excellent stuff!! You solved my problem in 7 mins.
    Also can pls explain how can I limit the number of characters in a particular cell of a csv file. For example upto 2000.
    Please help.

  • @noltarferior
    @noltarferior 2 ปีที่แล้ว

    I was wandering how do I create a file where the USER can write in it?

  • @miguelmora2141
    @miguelmora2141 3 ปีที่แล้ว

    How do you print out every line in reverse alphabetical order?

  • @ahmadhasham6890
    @ahmadhasham6890 4 ปีที่แล้ว

    can we write and read from a text file in a single java file?

  • @Not8690
    @Not8690 3 ปีที่แล้ว

    what is it called with how his bw.write(str:) like it's showing you your method/function is a string. I notice that in all his videos that it tells you what it is.

    • @Not8690
      @Not8690 3 ปีที่แล้ว

      nevermind that's not it :/

  • @n9583
    @n9583 3 ปีที่แล้ว

    Amazing video but Is it the same for Mac?

  • @mo-_-om7475
    @mo-_-om7475 3 ปีที่แล้ว

    how to check if the words in a text file Palindromes are or not?

  • @waytoallah5831
    @waytoallah5831 3 ปีที่แล้ว

    my text is in the same line even when i write

  • @An-fu9ui
    @An-fu9ui 2 ปีที่แล้ว

    Sir, i want to ask you how to create an object like for example Class Student in file io ?

  • @ibrahimazam1157
    @ibrahimazam1157 3 ปีที่แล้ว

    I wish my assignments were as simple as this 😪

  • @skud1377
    @skud1377 2 ปีที่แล้ว

    worked great thanks

  • @DmytriiPavlichenko
    @DmytriiPavlichenko 3 ปีที่แล้ว +2

    Streams closing in "try" section? So bad practice... Be cleaver, do it in "final" block

  • @randomstorywa5107
    @randomstorywa5107 4 ปีที่แล้ว

    How about integer in Bufferwriter?

  • @cityzenctm3932
    @cityzenctm3932 4 ปีที่แล้ว

    Thanks you're awesome

  • @pooblock4092
    @pooblock4092 3 ปีที่แล้ว

    Sick video, we were given shit content on this in college and this will help me out with the assignment lol.

  • @Motivational-Mango
    @Motivational-Mango 9 หลายเดือนก่อน

    very good. i like txt file. i write many thing like about the world and about dogs and cats in the file. i write very good information in the file.

  • @shahadhussein9708
    @shahadhussein9708 3 ปีที่แล้ว

    what if I wanted to print a specific line from a file? can anyone help?

  • @AmandeepPatro
    @AmandeepPatro 9 หลายเดือนก่อน +1

    just wow

  • @yousefalzeer7265
    @yousefalzeer7265 4 ปีที่แล้ว

    i will start to learn cooding soon
    so what should i learn first
    python
    or
    javascript

    • @tannerbarcelos6880
      @tannerbarcelos6880 4 ปีที่แล้ว +2

      javascript is good but for its more advanced stuff, including asyncronous coding and such will kinda get confusing when you get to it versus python being a lot more straight forward and easier to learn. I would say learn all the core basics of Python and then get into some JS. Personally, though, I believe learning C++ and Java is best because you will learn proper coding practices and logic for how higher level languages like python and JS work without the verbosity of types, memory management etc. in the lower level languages.
      Short answer: Python lol

    • @yousefalzeer7265
      @yousefalzeer7265 4 ปีที่แล้ว +1

      @@tannerbarcelos6880
      thanks man
      that helps alot👍🏻👍🏻👍🏻

    • @tannerbarcelos6880
      @tannerbarcelos6880 4 ปีที่แล้ว +1

      @@yousefalzeer7265 no problem! Just don't get discouraged. Whatever you start with, it'll take hard work regardless, but it is not as hard as many make it out to be! Just trust the process.

    • @yousefalzeer7265
      @yousefalzeer7265 4 ปีที่แล้ว

      @@tannerbarcelos6880
      i will
      but do you know a good youtubers that are very good in making tutorials or lessons

    • @yousefalzeer7265
      @yousefalzeer7265 4 ปีที่แล้ว +1

      @@tannerbarcelos6880 thanks so much man
      i really appreciate it 👍🏻👍🏻

  • @DZITSEWISDOM
    @DZITSEWISDOM 8 หลายเดือนก่อน

    how can i code a bar chart in java

  • @joesmall8650
    @joesmall8650 3 ปีที่แล้ว

    Which platform do you use?

  • @Jeff-zc6rr
    @Jeff-zc6rr 2 ปีที่แล้ว

    Append to the file?

  • @shanesreal
    @shanesreal 4 ปีที่แล้ว

    Well done thumbs up

  • @charlesochanda5111
    @charlesochanda5111 4 ปีที่แล้ว +2

    Great video! great quality! great explanation! 👏 but I think most of us enjoy watching non-coding related videos more😄

  • @msnraju97
    @msnraju97 3 ปีที่แล้ว

    what str. in bw.write line? even without it will work?

  • @ipengiewoo
    @ipengiewoo 3 ปีที่แล้ว

    Nice tutorial!

  • @shiroisekai_20
    @shiroisekai_20 3 ปีที่แล้ว

    is it possible to use this method to make a user password program

  • @AnirudhSharma9211
    @AnirudhSharma9211 3 ปีที่แล้ว +2

    Karen, Chad and Becky LMAO

  • @danieloguhebe1669
    @danieloguhebe1669 4 ปีที่แล้ว

    But you didn't cover how to read from excel files using java.io.*;

  • @bwb3881
    @bwb3881 3 ปีที่แล้ว

    What is the meaning of str ?

  • @abukmoha5092
    @abukmoha5092 4 ปีที่แล้ว

    thank you very help full....

  • @altechy7304
    @altechy7304 3 ปีที่แล้ว

    hey man!... did you ever get the "I want to be like you" ?... LOL Congrats and thank you!

  • @Momo-qr3rd
    @Momo-qr3rd 2 ปีที่แล้ว

    Thanks Bro

  • @marryammalik9500
    @marryammalik9500 3 ปีที่แล้ว

    Thanks alot

  • @lazarvukosavljevic2730
    @lazarvukosavljevic2730 3 ปีที่แล้ว

    Bro this video is helpfull only if you have like 3 yrs of exp behind you, not beginner frendly

  • @rhsliza7023
    @rhsliza7023 ปีที่แล้ว

    thanks sir

  • @mihirkohli4804
    @mihirkohli4804 4 ปีที่แล้ว

    Thankss

  • @shivasundar1998
    @shivasundar1998 2 ปีที่แล้ว

    You look like Charlie Cox

  • @reemalotaibi7893
    @reemalotaibi7893 4 ปีที่แล้ว

    what is the difference when i say output.txt and input.txt ?

    • @thatoneuser8600
      @thatoneuser8600 3 ปีที่แล้ว

      ? nothing, they're just file names..

  • @moaaatekita8827
    @moaaatekita8827 2 ปีที่แล้ว

    Arigato onichan

  • @ahmadfx8962
    @ahmadfx8962 2 ปีที่แล้ว

    if finished the app and then i want to give it to client, how to make path to my client directory ? maven give me this>>Required filename-based automodules detected. Please don't publish this project to a public artifact repository!

  • @gopixus
    @gopixus 4 ปีที่แล้ว

    Great content but why only 1752 views? Sub!