Binary Search in Java - Full Simple Coding Tutorial

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  • เผยแพร่เมื่อ 12 ก.พ. 2023
  • Full tutorial on Binary Search in Java!
    ☕ Complete Java course: codingwithjohn.thinkific.com/...
    What is Binary Search? How does it work, why is it useful, and how do you implement your own version of a Binary Search in Java?
    We'll learn all about Binary Search, why it's faster than other search algorithms, and walk through a full implementation from scratch.
    SOURCE HERE:
    Regular implementation: drive.google.com/file/d/1eMdY...
    Recursive implementation: drive.google.com/file/d/1Pii8...
    Learn or improve your Java by watching it being coded live!
    Hi, I'm John! I'm a Lead Java Software Engineer and I've been in the programming industry for more than a decade. I love sharing what I've learned over the years in a way that's understandable for all levels of Java learners.
    Let me know what else you'd like to see!
    Links to any stuff in this description are affiliate links, so if you buy a product through those links I may earn a small commission.
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ความคิดเห็น • 176

  • @danielja1832
    @danielja1832 ปีที่แล้ว +118

    My man, we were just covering this in college this week and you happen to be much better at explanations than our professor. You're a legend!

    • @theseriousaccount
      @theseriousaccount ปีที่แล้ว +5

      College makes more money the longer it takes, it feels like an expensive scam because it is. Learning is best done elsewhere.

    • @programmingwithnurulhuda
      @programmingwithnurulhuda ปีที่แล้ว

      @@theseriousaccount It's always good to learn something.

    • @frankiia7507
      @frankiia7507 9 หลายเดือนก่อน +1

      tell your professor that face to face

    • @RishiRajxtrim
      @RishiRajxtrim 8 หลายเดือนก่อน

      Yes, 100 points!

    • @kritibrotodatta5172
      @kritibrotodatta5172 6 หลายเดือนก่อน +2

      Why do I have to learn this in class 10 😭

  • @jasonmilton7158
    @jasonmilton7158 ปีที่แล้ว +27

    I’m currently a CS student at UofSC Columbia and YOU played a major role in me getting an A in my first Java class and it looks like you’re also gonna play a major role in me passing the second one. I know when I get my degree you will deserve half the credit good sir. Each of your videos are easily more valuable than a week of in class lectures! Thank you

  • @martinrombach2666
    @martinrombach2666 ปีที่แล้ว +9

    Dude you are by far the best online Java teacher I've come across. So good at explaining things. You deserve more views!

  • @fardovav1
    @fardovav1 ปีที่แล้ว

    So well explained. Thank you John for coding and explaining each step. Much better than our professor could do!

  • @ruvvier1509
    @ruvvier1509 ปีที่แล้ว +2

    This is such a good timing to what I am learning in class right now in college. Thank you John!

  • @hashantha_lk
    @hashantha_lk ปีที่แล้ว

    The best explaining ever ! Clarity is top notch John ! Sending gratitude from SriLanka! ❤

  • @chulsooslaugh1209
    @chulsooslaugh1209 ปีที่แล้ว

    Your explanations are easy to understand. It might be your voice or your choice of words but whatever it is, I'm thankful that I am able to fully grasp the concept more easily this time compared to when I took it 2 semesters ago. Looking forward to more videos in the future!

  • @andreadiotallevi5780
    @andreadiotallevi5780 ปีที่แล้ว

    Such an excellent communicator - I wish to become as articulate as you. Amazing video!

  • @mastershonobi110
    @mastershonobi110 ปีที่แล้ว

    Thanks John for making these vids; we appreciate your time and effort(s).

  • @justalilbit8887
    @justalilbit8887 ปีที่แล้ว

    Thank you John! I 've been digging into search algorithms, lately. It's great to see you made another great video for it.

  • @simonrozendal7542
    @simonrozendal7542 ปีที่แล้ว

    Wow especially with a lot of data, binary search goes really vast and saves a lot of time and energy. thank you John.

  • @koikoi7666
    @koikoi7666 ปีที่แล้ว +11

    I'm a Senior Dev in Java and I just discovered your videos this week. Even though i'm experienced in the language I feel like I still learn things from watching your content, the way you explain things is incredibly easy to grasp. Please keep making more content, I think you are much better than other channels or even paid courses I have taken in the past.

    • @yaroslavpanych2067
      @yaroslavpanych2067 หลายเดือนก่อน

      Pray your boss doesn't discover this comment, you will be demoted to juniors at best!

  • @Antonio-kv4lj
    @Antonio-kv4lj ปีที่แล้ว

    Started learning Java two weeks ago. Your videos are godsent. Really enjoying them. I would very appreciate if you could make video about managing workspace, projects, files and jdks (jres) in Eclipse. I'm having little trouble with understanding all that. Much thanks.

  • @fruttoo
    @fruttoo ปีที่แล้ว

    One video watched, and boom! I became your subscriber. You''re really good with explanations. Congrats!

  • @MariaRuiz-qm5ql
    @MariaRuiz-qm5ql ปีที่แล้ว +1

    Every time I need to understand something better I go to TH-cam hoping that you’ve covered it …🙏 Thank you so much!!

  • @elizabeth00653
    @elizabeth00653 ปีที่แล้ว

    John I love your Java videos and I really think you're one of the best Java instructors here. I was wondering if you'd consider explaining a Java login project one day with a useful framework, or adding it to your course. That would be so awesome.

  • @angelcholakov2670
    @angelcholakov2670 ปีที่แล้ว

    Hi John, I really enjoy your videos and the way you explain java in general, so thanks about what You do I am sure loads of people do appreciate it too. I wonder if You have plans to do a video about GUI any time soon? I would love to see one (if this can be done in one video of course) as I am about there in my java study right now

  • @TheTrueType
    @TheTrueType ปีที่แล้ว +1

    Hey John, amazing videos you got here on your channel. You are really playing in an own league, thank you very much helped me a ton! Would you mind doing a video about Iterator aswell?

  • @abuiman5251
    @abuiman5251 ปีที่แล้ว

    Thank you brother! Please don't stop teach us!! God bless you!

  • @jordanT_alker
    @jordanT_alker 2 หลายเดือนก่อน

    thank you John wonderful video
    I will use this on my arrays homework, I have some ideas I want to accelerate faster.

  • @aldoumene6201
    @aldoumene6201 ปีที่แล้ว +1

    Yaay love it! more data structures and algorithms please 🙏

  • @fisheyesarans
    @fisheyesarans 10 หลายเดือนก่อน

    Excellent explanation to prepare for a quick interview

  • @bels1
    @bels1 ปีที่แล้ว +1

    Fantastic explanation, as always! Can you also make a video on the Big O notation?

  • @artem2055
    @artem2055 ปีที่แล้ว +20

    i was waiting for it! Please do more videos on algorithms and problem solving in general

  • @althafazard4232
    @althafazard4232 ปีที่แล้ว

    I came to this video just to know you, you are doing great. Your explanation are top notch 🔥

  • @anishmathew7108
    @anishmathew7108 ปีที่แล้ว

    I think you are one of the best Java tutorials videos done in TH-cam , can you done tutorials for spring boot

  • @oussamaachour1523
    @oussamaachour1523 ปีที่แล้ว

    Hey john, thanks for all your tutorials, I would like to see you doing one project with all the oops concepts if that is possible

  • @kristhianortiz151
    @kristhianortiz151 ปีที่แล้ว

    I just needed this!!! You're a savior🙏🙏🙏

  • @williamsun2230
    @williamsun2230 ปีที่แล้ว +1

    Hi John! Love your videos!!! May you make one on the big O notation? Thank you!!!

  • @amongusztav655
    @amongusztav655 ปีที่แล้ว +1

    Very informative and useful video! Thanks!

  • @kap21031991
    @kap21031991 ปีที่แล้ว

    This is very good content and explained in very simple manner!! Please try to create tutorials on concurrency and parallelism.

  • @palakkhatri6264
    @palakkhatri6264 ปีที่แล้ว

    Amazing, amazing, amazing explaination John!!

  • @DadaKhan1912
    @DadaKhan1912 ปีที่แล้ว

    Hi Sir, I have watched every video of Java on your Channel. You are Extremely Super in Teaching Java. And now I want to Learn Java Spring Boot. And I think you are the best teacher to teach Spring Boot in Java. And it is also Tending Technology. So I am telling you to create a playlist on Java Spring Boot. And it will help all the people who want to learn Java Spring Boot. Thank you sir ❤

  • @5n2joelemmanuel54
    @5n2joelemmanuel54 ปีที่แล้ว +2

    john is so good at explaining i could binge watch these tutorials and not get bored

    • @CodingWithJohn
      @CodingWithJohn  ปีที่แล้ว +1

      Have at it!

    • @cloudycode5009
      @cloudycode5009 ปีที่แล้ว +2

      ​@@CodingWithJohn Hey man, i love so much your videos im a student, im very excited, i want to see videos about Java GUI awt spring

  • @benjaminallcock4268
    @benjaminallcock4268 ปีที่แล้ว

    Wow, this is awesome explanations, thank you 😃

  • @ManishYadav-yp2mi
    @ManishYadav-yp2mi ปีที่แล้ว

    Your videos are really helpful and good for students like me. If only you can start a series of leetcode solving regularly that would be game changer for us. Whether you upload something or not try to upload problem solving question. thank you

  • @Tranzin40
    @Tranzin40 ปีที่แล้ว

    cool video, it would be cool to hear about faster search and sorting algorithms

  • @adulmdul8939
    @adulmdul8939 7 หลายเดือนก่อน

    man you're my rescuer, with sincere love and appreciation

  • @reapxiety
    @reapxiety 6 หลายเดือนก่อน

    John! I love your vids man, Could you do a Linear Search algorithm?
    I'm honestly having struggles with that algorithm, very much appreciate it

  • @fabiofucks1
    @fabiofucks1 ปีที่แล้ว

    Great video, waiting for streams and Collections tutorial !!!

  • @mouloudguell2763
    @mouloudguell2763 ปีที่แล้ว

    very good and clear explanation

  • @btrsl
    @btrsl ปีที่แล้ว

    Great explanation 👌! First time watcher here, will watch more of your content.

    • @CodingWithJohn
      @CodingWithJohn  ปีที่แล้ว

      Thanks a ton! Hope they're helpful, and let me know if there's anything you'd like to see!

    • @btrsl
      @btrsl ปีที่แล้ว

      @@CodingWithJohn I've watched more than 10 videos of yours in last couple of days. Learned a lot! I'd love to see some Design Patterns content (implemented in java) on your channel.

    • @btrsl
      @btrsl ปีที่แล้ว

      and also congrats on 200k subs!!! 🥳🥳🎉🎉🎉

  • @fahadgaliwango4502
    @fahadgaliwango4502 3 หลายเดือนก่อน

    first attempt and your explanation is very clear

  • @auritro3903
    @auritro3903 หลายเดือนก่อน

    Damn I have my AP Computer Science A exam tomorrow, you're literally gonna save me :D Thanks!

  • @RehanAhmad1
    @RehanAhmad1 9 หลายเดือนก่อน

    you're my end of search as Java Teacher.. no matter what algorithm we use.. 😀

  • @davidpokol
    @davidpokol ปีที่แล้ว

    Great vid John, but here is a little thing you didn't mention about the built-in binary search method: If the number that we looking for is not in the array, the built-in method returns -(insertion point).
    So for example, if the array contains the following values {1, 2, 4, 5, 7, 9, 11}, and we would like to find 8, it would print -6.

    • @CodingWithJohn
      @CodingWithJohn  ปีที่แล้ว +1

      Nice! Didn't realize that about the built in one, that's a nice feature

  • @HackBoy_YT
    @HackBoy_YT 7 หลายเดือนก่อน

    I am a 10 th grade student from India and dont know binary search thank u so much u deserve millions of subscribers 😊

  • @vidyasagar5661
    @vidyasagar5661 ปีที่แล้ว

    Hii John Thankyou soo much for all your efforts, if possible can you start making videos on java8 features mostly on stream and its supporting methods like we have many in this streams i,e distinct,averaging int,groupingby,mappingby, etc Thanks in advance

  • @SarangSaraf
    @SarangSaraf ปีที่แล้ว +2

    Thank you sooo much. I stopped watching my paid udemy Java courses after I found your channel. REALLY!

  • @kieranteets527
    @kieranteets527 ปีที่แล้ว

    I love your videos but i was wondering what editor are your using? Keep up the awesome videos!!

    • @CodingWithJohn
      @CodingWithJohn  ปีที่แล้ว

      Thanks! I use DaVinci Resolve to edit my videos, it's free and offers everything I need.

  • @viewer_evgeniy
    @viewer_evgeniy 10 หลายเดือนก่อน

    I want to add one important thing about moving high and low pointers to the "right" or "left" of middle pointer (mid+1 or mid-1), it's not just because we want to exclude the number (index) which out of our concern already since we know that if our searched value is not equal to the middle pointer value then there is no reason to ever deal with it again. But doing such kind of things (+1 or -1) ensures that we won't be stuck in an infinite loop (in case your searched value is not presented in the array).

  • @prasannsurya9415
    @prasannsurya9415 ปีที่แล้ว

    Hey john i have a doubt in java, what is the difference between object and instance , please could you make a brief video of that it will very useful to all , and make more understanding of the fundamentals in java

  • @da_nightcore
    @da_nightcore ปีที่แล้ว

    yeah man do more prob solving stuff ,really need them in java

  • @ogfit5448
    @ogfit5448 6 หลายเดือนก่อน

    I prefer to make my middle position variable "pointer" but nice simple explanation here!

  • @newtonnath74
    @newtonnath74 ปีที่แล้ว

    Thanks so much. It really helps.
    Can you please upload a video explaining "Static" keyword? Thanks again!

  • @UCE5YhzPOD
    @UCE5YhzPOD ปีที่แล้ว

    From my experience I would recommend to use half-open intervals instead of segments in all algorithms that use intervals like binary search, sortiing, segment tree and so on. It allows to decrease number of +1/-1 in the code, and this +1/-1 is a place where people often make mistakes.
    private static int binarySearch(int[] numbers, int numberToFind) {
    int low = 0, high = numbers.length;

    while (low + 1 < high) {
    int middlePosition = (low + high) / 2;
    int middleNumber = numbers[middlePosition];
    if (numberToFind < middleNumber) {
    high = middlePosition;
    } else {
    low = middlePosition;
    }
    }
    if (low < numbers.length && numberToFind == numbers[low]) {
    return low;
    } else {
    return -1;
    }
    }

  • @noobster9212
    @noobster9212 ปีที่แล้ว

    very thoughtful idea

  • @codeZarathustra
    @codeZarathustra ปีที่แล้ว

    Thanks Jhon!

  • @Talkatfive
    @Talkatfive 2 หลายเดือนก่อน

    Excellent tutorial

  • @ciccioruccella2248
    @ciccioruccella2248 ปีที่แล้ว

    Jhon why dont you start a tutorial about Spring? Thanks to you I learned Java and now I am having some problem with spring without your video! 😁

  • @katiebeers2476
    @katiebeers2476 8 หลายเดือนก่อน

    I love your videos, you're fantastic

  • @programmingwithnurulhuda
    @programmingwithnurulhuda ปีที่แล้ว

    It's always good to learn something.

  • @enriquepasa
    @enriquepasa ปีที่แล้ว

    Thanks for the video

  • @rtweakim3122
    @rtweakim3122 2 หลายเดือนก่อน

    It is very simple and intuitive.😮😮😮😮

  • @denisdominguez7287
    @denisdominguez7287 ปีที่แล้ว

    Hi John, great video. But here is a small correction. The result of looking for the number 8 should have been -6. Because binarySearch returns the index where the missing number should be -1 (-(insertion point) - 1). But for an exercise is really cool. Thanks for your time 🙂

    • @ManosSef
      @ManosSef 9 หลายเดือนก่อน

      This is not a correction, it's a different way of doing it. Java's built-in library does it this way, John does it by always returning -1 when not found. Depends on if you actually want to know where the missing element would be though.

  • @user-hc2en1wl4l
    @user-hc2en1wl4l ปีที่แล้ว

    hello sir, again with another wonderful video , i would like to ask you if you can make a video about Dependency Injection in java

  • @gnair9064
    @gnair9064 ปีที่แล้ว

    Hey please don't stop uploading videos you are gret

  • @fadhlifirdaussulaiman1463
    @fadhlifirdaussulaiman1463 4 หลายเดือนก่อน

    Your DSA lectures are making me pass my IVs, damn it I'll repay you one day!!

  • @hemobhai1
    @hemobhai1 ปีที่แล้ว

    Thank You Sir

  • @user-bi9ip5hv3l
    @user-bi9ip5hv3l ปีที่แล้ว

    Thnx for the wonderful tutorial and keep up the good work => Btw you look like Mark Strong/ Jhonny Sins 🙂

  • @TheGamer720x
    @TheGamer720x ปีที่แล้ว

    Hi John, I'm curious to know for the experience you have in the software industry, what were the concepts in Java that were crucial in any scenario apart from basic control structures? Any design patterns/frameworks? Any concepts like Inheritance/ Overloading / Overriding etc? Thanks.

    • @atrivyas8512
      @atrivyas8512 ปีที่แล้ว

      all of them are equally important

  • @trup10ka
    @trup10ka ปีที่แล้ว

    Hello, this video was again, awsome, you though me so much during year 2022. I do have a request. Could you make a video about How to use Java with server requests and some things aroud this topic (URL's or something; I'm not really educated in this so please forgive me if I described it badly 😀)

  • @beachbuggyracing9305
    @beachbuggyracing9305 ปีที่แล้ว

    Great sir...

  • @teo_ke
    @teo_ke ปีที่แล้ว

    could you make video about static in class. how it works and where we should use it in

  • @ritampramanik1
    @ritampramanik1 หลายเดือนก่อน

    Professor your explanation is genius. Can you help me in an additional part, like if I want to print "Sorry we cannot find the number" instead of -1 what are the changes can we make to modify this code? THANK YOU in advance.

  • @omparghale
    @omparghale 10 หลายเดือนก่อน

    Hey john,which color scheme and theme do you use in your intellij ide?

  • @ahmedhakeem8183
    @ahmedhakeem8183 ปีที่แล้ว

    That is great , can you make future vedios like this for other search and sort algorithms and it will be great to explain cone 🥰

    • @CodingWithJohn
      @CodingWithJohn  ปีที่แล้ว +1

      I have a bunch of sorting algorithm videos already, so check them out! Any particular sort or search algorithm I haven't covered you'd like to see?

    • @programmingwithnurulhuda
      @programmingwithnurulhuda ปีที่แล้ว

      @@CodingWithJohn It's always good to learn something.

  • @djouudjou
    @djouudjou 8 หลายเดือนก่อน +1

    can we do the same but without hard coding the values ? like ask the user to enter all the vales and the target value ?

  • @AlisonAcostachinchilla18
    @AlisonAcostachinchilla18 2 หลายเดือนก่อน

    Thanks for the content. But why did you write the binarySearch method as private: "private static int binarySearch" ?

  • @clarence9527
    @clarence9527 ปีที่แล้ว

    hi, john, can you make a episode about the backslash usage in java regex please? such as the "\\\\" impies the "\" in java. it is tricky to understand.

  • @marknebadon8709
    @marknebadon8709 ปีที่แล้ว

    Just one question, from what I can see, is that we get a single number in the middle range when they are an odd set of numbers, so I was wondering what happens if we have 20 inputs in the array, which equals to 20 -1 / 2 in terms of index. What is the number evaluated? help please

  • @user-wg5rd6yz7e
    @user-wg5rd6yz7e ปีที่แล้ว

    You`re carrying my grade, I love u

  • @csistheonlychoice8256
    @csistheonlychoice8256 8 หลายเดือนก่อน

    can you make a video about time complexity of algorithms and Big O, Big Ω etc, notations please??

  • @hackwithharsha
    @hackwithharsha 11 หลายเดือนก่อน

    00:07:21 Thank You, Any reason to declare private method as static ?

  • @MaxBondarenko
    @MaxBondarenko ปีที่แล้ว

    Does it make sense to use it for Strings array?

  • @kiteSven
    @kiteSven ปีที่แล้ว

    Hello. I'm new on this channel. I have an off topic question: Is it ok to commit on using IntelliJ,now that I personally like it more than eclipse?
    TLDR:
    I'm not yet a good developer. I'm not yet very confident on my skills. I once had a very skilled teammate who permanently uses eclipse whatever team or company he goes. I thought I should try to do that too: To be consistent on a tool and master it. Since I think that eclipse might be the most popular IDE for java, I should try to stick with it.
    But now I encountered IntelliJ. For som reason I just learn and adopt quicker now. I also like it's default UI color. And I think it's easier to setup projects here. I think it's more user friendly to beginners or not so good developers like me. I like IntelliJ now but what if in the future, I encounter another team that mainly uses eclipse?

  • @user-db1im7qm1v
    @user-db1im7qm1v 7 หลายเดือนก่อน +1

    its great video

  • @osmanozturk5891
    @osmanozturk5891 ปีที่แล้ว

    Thanks John . i have a question
    if our array was int[] ={1,2,4,5,7,9,11,12}
    What search algorithm would we use? (fast)

    • @ManosSef
      @ManosSef ปีที่แล้ว

      It doesn't matter what the array is, binary search does the job.

  • @kshitijofthejune
    @kshitijofthejune ปีที่แล้ว +1

    Implement red black tree in java.. Using enums

  • @Avarn388
    @Avarn388 ปีที่แล้ว

    Is a good way to think of Binary Search is that if you have a physical dictionary, you’re starting at the middle and going left or right in sections as opposed to starting from the beginning or end of a dictionary? Correct me if I am wrong.

    • @CodingWithJohn
      @CodingWithJohn  ปีที่แล้ว

      That's a great way to think about it!

  • @TheUp001
    @TheUp001 ปีที่แล้ว

    john can you make a video on the tree ??😇

  • @user-kr8uu3bm4k
    @user-kr8uu3bm4k ปีที่แล้ว

    John , you are the best programmer-blogger I ever seen. Ukraine is watching you right now 🇺🇦❤️

  • @eugenesmith9940
    @eugenesmith9940 11 หลายเดือนก่อน

    I've seen in some binary search realizations that formula to calculate middle pointer looks like that: low + (high - low) / 2. Why is that?
    Also, inside Arrays class this part of binary search looks like: (high - low) /2 >>> 1. How to read such code? What >>> 1 does in this case?

    • @girijashankarn
      @girijashankarn 8 หลายเดือนก่อน

      Sane question…. Did you get any answer on low+(high-low)/2?

  • @artaxerxes360
    @artaxerxes360 ปีที่แล้ว

    Sir please do a video on apache maven

  • @ngndnd
    @ngndnd ปีที่แล้ว

    woah wtf this was posted at the perfect time. I searched this up thinking it was one of your older videos lmao

    • @CodingWithJohn
      @CodingWithJohn  ปีที่แล้ว

      Nice! I stole the thumbnail pic from an older video (forgot to take a new one...) so maybe that thre you off

  • @ganastars7402
    @ganastars7402 ปีที่แล้ว

    Could you please send me a link for complete course for learning Java for biggner for yourself

  • @yashwanth2657
    @yashwanth2657 9 วันที่ผ่านมา

    Hey random question but is CS really that bad right now? I'm planning to go to uni for CS bsc. Am i not going to be able to get a job? Will I not be successful?

  • @TheUp001
    @TheUp001 ปีที่แล้ว

    you are hero

  • @vedantjha2327
    @vedantjha2327 ปีที่แล้ว

    Can u make video on roatated binary search

  • @shiz4849
    @shiz4849 ปีที่แล้ว

    What do you think about starting a new mini-series about sorting algorythms Maybe bubble sort or bogosort (bogosort could be a great idea for video on april 1st) next? Edit: i missed that u made a video about the worst sorting algoryth

    • @CodingWithJohn
      @CodingWithJohn  ปีที่แล้ว +1

      I also have a bubble sort video, along with a handful of other sorting algorithms!