🧠 Java-dsa-roadmap 🚀

Welcome to Java DSA Roadmap – your one-stop resource for mastering Data Structures and Algorithms (DSA) in Java. This repository serves as a comprehensive and centralized checkpoint for anyone looking to strengthen their understanding of DSA concepts, improve coding interview performance, and enhance their problem-solving skills in real-world software development.
Whether you're a student, self-learner, or professional, this roadmap will guide you through the key concepts of DSA in Java, with hands-on examples, practical problems, and advanced techniques. Each section of this repository is designed to be concise, insightful, and interview-ready, making it a perfect tool for preparing for technical interviews and exams.

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📚 What You'll Learn

Each day covers a specific topic in DSA with:

• ✅ Simple, clear explanations
• ✅ Diagrams & visualizations
• ✅ Time & space complexity analysis
• ✅ Interview-style questions (Easy → Hard)
• ✅ Real-world use cases
• ✅ Practice sets and mini-projects
• ✅ Glossary, FAQs, and best practices

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📅 Daily Topics

Day	Topic	Link
Day 0	Java Setup	Java Setup Guide
Day 1	Arrays & Strings	Arrays & Strings
Day 2	Linked Lists	Linked List
Day 3	Stacks and Queues	Stack
...	...	...

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🛠️ How to Use

1. Clone this repo

   git clone https://github.com/yourusername/30-Days-of-DSA-Java.git
   cd 30-Days-of-DSA-Java

2. Open in your IDE (IntelliJ/VS Code)

3. Follow the daily folders and read through the .md files.

4. Run Java code using provided Main.java files.

5. Solve interview questions and practice sets.

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🤝 Contributions

Pull requests are welcome! If you’d like to add notes, correct something, or enhance examples, feel free to fork and contribute. Frontend contributions are also welcome! Please check the frontend repo if you want to contribute to the frontend. Mail me at: [email protected]

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📅 Day 0: Java Setup Guide

Before diving into DSA, let’s get your system ready to code in Java! 📘 Java_Setup_Guide.md (inside Day0_Setup/)

🔧 Step 1: Install Java JDK

Download and install Java from:

• Oracle JDK (Recommended)
• or OpenJDK (Free, open-source)

📌 Recommended version: Java 17+

Verify installation:

java -version
javac -version

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🔧 Step 2: Install an IDE

Choose an Integrated Development Environment:

IDE	Why Use It	Download Link
IntelliJ IDEA	Great for Java, smart suggestions	Download
VS Code	Lightweight + extensions	Download
Eclipse	Classic Java IDE	Download

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🧱 Step 3: Create Your First Java File

Using IntelliJ:

1. File → New Project → Java
2. Set SDK to your installed JDK
3. Create a class: Main.java
4. Run with Shift + F10 or the green play button.

public class Main {
    public static void main(String[] args) {
        System.out.println("Java setup successful!");
    }
}

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🔍 Step 4: Optional – Run Java Without IDE

Compile:

javac Main.java

Run:

java Main

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Next: Day 1: Arrays & Strings

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Let me know if you'd like a visual badge set (like "Day 1 ✅", "Practice 🔁", etc.) or help in setting up folder scaffolding or visuals for GitHub README!