Udemy

Java Data Structures & Algorithms + LEETCODE Exercises

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  • 96,114 Students
  • Updated 9/2025
4.6
(13,910 Ratings)
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Course Information

Registration period
Year-round Recruitment
Course Level
Study Mode
Duration
11 Hour(s) 7 Minute(s)
Language
English
Taught by
Scott Barrett
Rating
4.6
(13,910 Ratings)

Course Overview

Java Data Structures & Algorithms + LEETCODE Exercises

DSA + LEETCODE for Coding Interviews — Clear, Step-by-Step Animated Walkthroughs!

Welcome to Data Structures & Algorithms in Java

This course makes learning to code fun and makes hard concepts easy to understand.

How did I do this? By using animations!

Animating the Data Structures & Algorithms makes everything more visually engaging and allows students to learn more material - in less time - with higher retention (a pretty good combination).

I will use these visuals to guide you, step-by-step, through the entire course.

The course also includes dozens-and-dozens of Coding Exercises. So you can immediately put everything into practice as soon as you learn it (a very important step).

All of this will help you to feel more confident and prepared when you walk into a coding interview.

I have made several Free Sample Videos available for the course so you can see the difference the animations make.

Also, I am very active on the Q&A, so I will be with you every_step_of _the_way.

_____________________________


What you will get in this course…


Over 100 hand-crafted animated HD videos to illustrate the Data Structures & Algorithms.


Here are the topics we will cover:


Technical

  • Big O notation


Data Structures

  • Arrays

  • Array Lists

  • Linked Lists

  • Doubly Linked Lists

  • Stacks & Queues

  • Binary Trees

  • Hash Tables

  • Heaps

  • Graphs


Algorithms

  • Dynamic Programming

  • Sorting

    • Bubble Sort

    • Selection Sort

    • Insertion Sort

    • Merge Sort

    • Quick Sort


Searching

  • Breadth First Search

  • Depth First Search



Don't just take my word for it though, check out what existing students have to say about my courses:

  • 5-Star Review:
    "In order to describe this course accurately, we need the definition of the word Beautiful. beau·ti·ful: adjective 1.- pleasing the senses or mind aesthetically. 2.- of a very high standard; excellent." - Josue Hernandez Amezcua

  • 5-Star Review:
    "The best course on DSA on Udemy" - Enlai Li

  • 5-Star Review:
    "One of the best courses on DSA. The animations do make a huge impact. All the points are explained in detail. The only problem is that I can't give it more than a 5-star rating." - Nikita Sarkar

  • 5-Star Review:
    "Amazing Course. My words cannot describe how much animations helped me to understand the concepts. 100% Recommended." - Simarjeet Singh

  • 5-Star Review:
    Being a visual learner this is BY FAR the BEST course ever. The way the instructor presents this topic makes it so easy to understand." - Eduardo SN

  • 5-Star Review:
    "The animations were really helpful for an easy understanding, but the best thing about this course for me is that it will not waste your time! It is perfectly optimized, covers the important topics that I wanted, and at the same time perfectly clear. Thank you so much." - Fatemeh Moghaddam

  • 5-Star Review:
    "This course is very well done! ... the animations in each video take the explanation and understanding of the material to a new level." - Luis Felipe Posada

  • 5-Star Review:
    "This course has seriously been amazing. The animations have worked wonders for my understanding and I have made significant progress from the beginning of the course until now." - Dakota Fabro

  • 5-Star Review:
    "I can follow as a beginner, amazing." - Sabrina Fung

  • 5-Star Review:
    "This is the best course I have ever seen" - Luong Viet Tri

REMEMBER… I'm so confident that you'll love this course that we're offering a FULL money-back guarantee for 30 days! So it's a complete no-brainer, sign up today with ZERO risk and EVERYTHING to gain.

So what are you waiting for? Click the "Buy now" button and join the best Java Data Structures & Algorithms course on Udemy.

I look forward to seeing you in the course.

Now let's get started! :-)


Course Content

  • 41 section(s)
  • 150 lecture(s)
  • Section 1 Introduction
  • Section 2 Big O
  • Section 3 Classes & References
  • Section 4 Linked Lists
  • Section 5 <> LL: Coding Exercises
  • Section 6 <> LL: Interview / LeetCode Exercises
  • Section 7 Doubly Linked Lists
  • Section 8 <> DLL: Coding Exercises
  • Section 9 <> DLL: Interview / LeetCode Exercises
  • Section 10 Stacks & Queues
  • Section 11 <> S&Q: Coding Exercises
  • Section 12 <> S&Q: Interview / LeetCode Exercises
  • Section 13 Trees
  • Section 14 <> BST: Coding Exercises
  • Section 15 <> BST: Interview / LeetCode Exercises
  • Section 16 Hash Tables
  • Section 17 <> HT: Coding Exercises
  • Section 18 <> HT: Interview / LeetCode Exercises
  • Section 19 Graphs
  • Section 20 <> Graph: Coding Exercises
  • Section 21 Heaps
  • Section 22 <> Heap: Coding Exercises
  • Section 23 <> Heap: Interview / LeetCode Exercises
  • Section 24 Recursion
  • Section 25 Recursive Binary Search Trees
  • Section 26 <> rBST: Coding Exercises
  • Section 27 <> rBST: Interview / LeetCode Exercises
  • Section 28 Tree Traversal
  • Section 29 <> BST Traversal: Coding Exercises
  • Section 30 <> BST Traversal: Interview / LeetCode Exercises
  • Section 31 Basic Sorts
  • Section 32 <> Basic Sorts: Coding Exercises
  • Section 33 <> Basic Sorts: Interview / LeetCode Exercises
  • Section 34 Merge Sort
  • Section 35 <> Merge Sort: Coding Exercises
  • Section 36 <> Merge: Interview / LeetCode Exercise
  • Section 37 Quick Sort
  • Section 38 <> Quick Sort: Coding Exercises
  • Section 39 Dynamic Programming
  • Section 40 <> Array: Interview / LeetCode Exercises
  • Section 41 Coding Exercises

What You’ll Learn

  • Solve 100+ coding exercises to ace DSA interviews with confidence., Think like a pro coder to tackle complex problems efficiently., Master data structures—linked lists, trees, heaps, graphs—for practical use., Learn algorithms—sorting, recursion, dynamic programming—with clarity., Analyze time and space complexity to optimize your coding solutions., Grasp DSA concepts faster with animated examples for deeper insight., Apply DSA to solve LeetCode challenges and practical coding problems., Boost your developer skills to excel in technical interviews confidently.


Reviews

  • H
    Heikki Siikavirta
    4.5

    I been liking this course so far! Examples are ingrained by the theory and practice!

  • s
    sunath thenujaya
    4.5

    Overall, it’s very good quality — truly quality over quantity. The videos are shorter, but the concepts are explained clearly and are easy to understand. It saves a lot of time, and you can use that extra time to focus on the exercises. At first, the exercises felt difficult, but in the end everything became clear. My problem-solving skills improved a lot, and understanding how to approach problems — especially LeetCode-style questions — became much easier.

  • N
    Natalia Kondratenko
    4.0

    Overall, this is a great course. The video explanations are excellent. Unfortunately, not every problem has a video, there is a tips and solution, but they're not as good. Some topics don't have any problems at all (graphs, dynamic programming). The theory is explained really well. This course really helped me to refresh and structure my knowledge of singly linked lists, hash maps, queues, stacks, trees and different types of sorting algorithms. General advice: it's always better to try writing the code yourself before watching the video.

  • M
    Marija Vukajlovic
    4.5

    The course was excellent overall. I would rate it even higher if it included more graph-related coding exercises, as well as a greater focus on more complex algorithms and data structures.

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