DSA-Java-Exercises

A collection of data structures and algorithm exercises in Java. CLI-based, self-contained, and beginner-friendly.

Demo

Summary

This repository contains a comprehensive collection of Java implementations for classic Data Structures and Algorithms (DSA) exercises. All exercises are based on the curriculum from CodeWithMosh's three-part DSA course, The Ultimate Data Structures and Algorithms. The project is organized by topic and serves as a personal capstone to reinforce Java fundamentals and algorithmic thinking through hands-on coding.

Interactive CLI Program

The project includes an interactive command-line interface (Main.java) that allows users to explore and experiment with almost all of the data structures and algorithms implemented in this repository.

• The CLI serves as a hands-on sandbox, enabling you to call various methods, manipulate structures, and visualize results without editing code directly.

• Once running, follow the on-screen prompts to choose a data structure or algorithm to interact with.

Tip: This is a great way to reinforce learning, test edge cases, or demo behavior without needing an IDE.

Structure

The project is divided into three main sections:

• dsa1: Foundational data structures

  • Arrays
  • Stacks and Queues (including implementations using other structures)
  • Linked Lists
  • Hash Tables

• dsa2: Intermediate and advanced data structures

  • Heaps (MaxHeap, MinHeap, with Recursive & Iterative Heapifiers)
  • Trees
  • Graphs
  • Priority Queues
  • Trie

• dsa3: Core algorithms

  • Search (e.g., Linear Search, Binary Search, Jump Search)
  • Sort (e.g., Bubble Sort, Merge Sort, Quick Sort)
  • String Manipulations (e.g., Anagram checks, character counting)

Getting Started

Requirements

• Java Development Kit (JDK) 17

Running the Code

1. Clone the repository:

   git clone https://github.com/RussBurnham/DSA-Java-Exercises.git
   cd DSA-Java-Exercises

2. Compile the CLI entry point:

   javac Main.java

3. Run the program:

   java Main

Tip: If Main.java relies on files in subdirectories or packages, you may need to compile everything:

javac */*.java Main.java

Notes

• Each class is self-contained, and most include a main method for testing or demonstration.
• You can edit any file to test edge cases, new logic, or improvements.
• If you’re using an IDE (like IntelliJ IDEA, Eclipse, or VS Code), simply import the project as a Java project and run individual classes with ease.

Author

Russ Burnham – GitHub

Acknowledgments

This project is based on exercises from the excellent The Ultimate Data Structures and Algorithms series by CodeWithMosh.

License

This project is licensed under the MIT License.
You are free to use, modify, and distribute this project for personal or commercial purposes.