Java Collections Tutorial
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- Опубліковано 12 вер 2024
- Learn all about Java Collections and write Java code with confidence!
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Somehow you manage to make videos that fit just along side my curriculum of coding for beginners in my computer science degree. Really nicely explained, and helps me grasp the concept better! Thanks Mosh
I started the video asking myself why i couldnt use the for each with the genericList. i start stackoverflowding not getting a good answer. little did i know the whole purpose of the video was explaning exactly that 🤣. Your way of teaching is very intuitive. i usually use your videos to understand and then complement with books once i do understand to get the intricacies of each topic.
- [00:33] 📚 Java Collections Framework Overview
- Overview of the Java Collections Framework hierarchy: interfaces represented by green boxes and classes by blue boxes.
- Hierarchy breakdown: `Iterable` interface, `Collection` interface, and sub-interfaces (`List`, `Queue`, `Set`) with added functionalities.
- Explanations on common operations declared in the `Collection` interface and their significance.
- [03:37] 🎶 Iterable Interface's Purpose and Problem Resolution
- Understanding the `Iterable` interface: its place in Java, functionality for iteration over objects.
- Demonstrating a problem with iterating over a generic list, highlighting issues with exposing internal implementations.
- Analogies with remote controls and encapsulation in object-oriented programming.
- [07:41] 🔍 Benefits of Implementing the Iterable Interface
- Exploring the benefits of implementing the `Iterable` interface: independence from internal implementations.
- Details on the `Iterator` interface and its role in simplifying iteration over collections.
- Demonstrating the conversion of a for-each loop into iterator operations via Java compilation.
- [09:02] 🧩 Implementing the Iterator Interface
- Step-by-step implementation of the `Iterator` interface within the `GenericList` class.
- Construction of a private nested class, `ListIterator`, and methods (`hasNext`, `next`) for iteration control.
- Enabling iteration over a generic list without exposing its internal structure.
- [13:06] 📦 Collection Interface Introduction
- Introduction to the `Collection` interface: its representation as a container for objects.
- Explanation of essential operations (`add`, `remove`, `contains`, etc.) declared in the `Collection` interface.
- Insight into extending the `Iterable` interface and common implementations like `ArrayList`.
- [20:00] 📂 Demonstrating Collection Interface Operations
- Implementation examples using the `Collection` interface within the `CollectionsDemo` class.
- Methods for adding, iterating, removing, checking existence, and converting collections to arrays.
- Utilizing utility methods like `addAll`, `size`, `clear`, and others within the `Collection` interface.
- [23:50] 📚 Converting Collection to String Array
- Converting a collection to a string array allows access to string methods.
- Utilizing `collection.toArray()` with a specified array type permits access to string methods easily.
- Utilizing `var` simplifies code readability despite arguments against its usage due to clarity in object type identification.
- [25:40] 🔍 Comparing Collections
- Comparing two collections for equality using `collection.equals(other)` compares their memory references.
- Checking for identical content between collections is done through `collection.equals(other)` method, which compares their actual content.
- [28:02] 📋 Exploring List Interface
- The List interface manages ordered collections where accessing objects by index is crucial.
- List operations include adding, inserting, retrieving by index, and removing items at specific indices.
- Features such as `list.subList()` provide functionality to obtain a sublist from a List.
- [30:27] 🔍 Using List Interface Methods
- Methods like `list.remove(index)` in List interface allow removal by specific index, a feature absent in general collections.
- `list.indexOf()` and `list.lastIndexOf()` determine the first and last indices of an element, respectively, aiding in search operations.
- The `list.subList(from, to)` method extracts a section of the list between two specified indices.
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'Mosh' means buffalo in bengali! Thank you so much sir for helping us so much ! i am a kid learning python from your online course and enjoying it as well!
who liked just now?
আমিও বাঙালি!
@@hasin9669 oo😄
Mosh doesn't mean buffalo in Bengali.... It's "mohish"
@@makjunior4558 same...🤗
This is exactly what I needed to learn next! Thanks so much Mosh! 😁
Be blessed Mosh Plus everyone else learning code through Mosh
Our curriculum is purely based on Delphi... I have learned a lot from all of your other videos for hobbies and now I know who to ask when I really need help! knowing that our country's public schools (and I believe most other schools) has a but of a struggle when it comes to teaching these kinds of things, would you be able to help us; at least with the basics?
You are absolutely very good teacher and programmmer.
Why would I use "collection collection = new ArrayList()" when I could use the class that implement the collections like "ArrayList alist= new ArrayList(); " ? Would benefit does it provide to use the collection? I guess I missed it in the video. LOL
Sir kindly make a video that complete react js course in latest version like functional components
I've learnt more than alot from your videos
please!! can you do a video on Open3d python?!🙏🙏🙏🙏
A great flow and good explanation to understand the lesson clearly...
Thank you mosh
Ur Videos are good 👍
Hi Mosh, Thank you for all the tutorials especially C#, i just finished your whole course on MVC 5. Please make also a Course on WPF C#, you have the best teaching method and style here in YT, so clear and precise and whats great is it is for real world scenarios as i just got hired as a 'no experience' developer and these tutorials helped me a lot. Thanks again and God Bless you and your family. 🙏
Thanks for your work, Mosh! Well done!
Thank you for making this video. Your examples are clear and easy to understand.
Mosh you are great guy whic macbook you use
Thank you for this, please touch on advanced java as a course. Thank you
*I would like to know about your next course details*
I'm learning and using Java 8, but I wish I had that var keyword!! Nice video, thanks.
Hi mosh could u plz once again give access to discount of yearly package on your courses I was unable at that time to pay.
uncanny timing - badly needed this one and couldn't have come from a better teacher :)
I am a big fan of mosh because of him i learnt python free that's happy
Hello Mosh, your videos has took me far in programming, pls.. I have some problem, my last comment you didn't reply for about three weeks now... How can I reach you so I can drive my questions to you personally rather than here ?
hello, would you consider to upload your courses to udemy?
When will the spring boot course be released？
What is 'var' in java?
After seeing kotlin syntax i think java is still clear and straight forward
Why are you using var as variable instead of the types?
ich bought a mastery course , but i can't find it in it. Could you say in with part and time exactly it is?
Can we learn python in place of JavaScript?
Mosh, i'm grateful for the content you uploaded on the youtube for free of cost.But one thing that i would like to address is that the pricing of the paid course is minimal according to U.S., but not for the asian community following you. So on behalf of all of them i request you to please consider differential pricing if possible.
yes, price localisation would be great (For perspective, the minimum wage in Indonesia capital city is less than $350 USD per month, or about $4200 yearly)
Please do java multithreading and java socket programming please
hey mosh ,how are you doing? i have a question about your paid courses..so if I subscribe for a monthly payment and enrolled in a course , and the month have passed without me completing the course..will I still be able to get to that course without subscribing for another month? please give me an answer :))
mosh please make a course on spring boot
enjoy java with mosh☕
Make a course of Dart programming language ❤️
Mosh can you go check your data structure and algorithms course part 2 & 3 is redirecting Back to homepage
Java is a best of millions of the world 🌎 by the way to
Excellent video, thank you
Sorry, but code at 4:55 doesn't work.
While it shows no errors, when trying to run it, I get:
Exception in thread "main" java.lang.ClassCastException
🤷♀️
Sir, can you make a tutorial video on Golang pls
what is var ? a data type?
Hello sir pls make a full course video on git .
Sir hi
How to write code
I am developing seo tools website using rapid api. But how to take user input in api url ?
I mean user enter something in search bar then get data by rapid api. Please help me sir
That was great.داداش دمت گرم
Why not do a course on a programming language C++?
Really great video.
This guy is great.
Thank you so much❤
Hi mosh sir
Are you ethiopian?
What about flutter course
Great video ❤
Please mosh can you create new node course 🙏
What is web 3
good explanation
Mosh how can I have a one on one conversation with you.
Are you from America
Hi Sara. How are you.
Thank you dnldd
Ishaan
I like mosh ally but this video made collections more complicated than it is
Hi
Start a course on Android app development
Are you iranian?
your videos are not good for beginners, many be people who know something a bout java but for an absolute beginner will always have loop holes in the understanding, but anyway thanks
Make your all paid courses free , then see the magic
سلام خیلی عالی بود
شرح حيل عميق مومال مبتدئين
Too many ads - it kills your concentration.
I didn't like it, completely not practical you tell that
202nd view.
Обращаюсь к российским айтишникам. У вас забирают лучшие года жизни. ua-cam.com/video/tzLSfWGl76A/v-deo.html
I need your GMail address. because i need a business app
Sir please, give me your email 🙏