💻 DSAWithJava

Welcome to DSAWithJava — a structured and comprehensive collection of Java programs covering everything from Java fundamentals to advanced Data Structures and Algorithms.

This repository is designed to help learners, job seekers, and competitive programmers strengthen their DSA skills using Java, with well-documented solutions, problem statements, and explanations for each topic.

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🚀 Why Use This Repository?

• ✅ Covers Java Basics to Advanced DSA
• ✅ Clean directory-wise topic separation
• ✅ Each sub-topic includes:
  • 📄 README.md with explanation
  • 💻 Well-written .java code
• ✅ Ideal for:
  • Interview preparation
  • Competitive coding
  • Academic understanding
  • Self-paced DSA learning

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🧭 Repository Structure

Each folder represents a major DSA topic or concept and contains:

• One or more .java source files
• A topic-wise README.md file with:
  • Problem descriptions
  • Intuition and approach
  • Code overview and complexity analysis

DSAWithJava/
├── JavaBasics/         # Variables, Loops, Conditionals, etc.
├── OOPs/               # Classes, Objects, Inheritance, Polymorphism
├── Arrays/             # 1D & 2D Arrays, Prefix Sum, Sliding Window
├── Strings/            # StringBuilder, Palindromes, Anagrams
├── Recursion/          # Backtracking, Subsets, Permutations
├── Sorting/            # Quick Sort, Merge Sort, Bubble, etc.
├── Searching/          # Binary Search, Search in Rotated Array
├── LinkedLists/        # Singly, Doubly, Reversal, Cycle Detection
├── Stacks/             # Stack using Array/LL, Infix to Postfix
├── Queues/             # Circular Queue, Deque, Queue using Stack
├── Trees/              # Binary Tree, BST, Traversals, Diameter
├── Heaps/              # Max/Min Heap, Priority Queue
├── Tries/              # Word Break, Prefix Search, Longest Word
├── Graphs/             # BFS, DFS, Dijkstra, Topo Sort, Kosaraju
├── DynamicProgramming/ # Knapsack, LIS, LCS, Memoization & Tabulation
├── Greedy/             # Activity Selection, Job Scheduling
├── BitManipulation/    # Bitwise Operations, Power of 2, XOR Tricks
└── README.md           # ← You are here!

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📚 Major Concepts Covered

1. Java Fundamentals

• Variables & Data Types
• Operators & Expressions
• Conditionals and Loops
• Functions & Recursion
• Input/Output Handling

2. Object-Oriented Programming

• Classes & Objects
• Constructors, Encapsulation
• Inheritance & Polymorphism
• Abstraction & Interfaces

3. Core DSA Topics

Topic	Concepts Included
Arrays	Prefix Sum, Kadane’s, Subarrays
Strings	Character Maps, StringBuilder, Reversal
Linked Lists	Cycle Detection, Reversal, Merge Sort
Stacks & Queues	Stack using Queue, Next Greater Element
Trees	Traversals, Diameter, LCA, Binary Search Trees
Graphs	DFS, BFS, Topo Sort, Dijkstra, Kosaraju
Tries	Word Break, Prefix Match, Autocomplete
DP	Knapsack, LIS, LCS, Matrix DP
Greedy	Huffman Coding, Job Scheduling
Bitwise	XOR Tricks, Subsets, Bit Counting

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📌 Sample Highlight: Tries

The Tries/ directory includes:

• Word Break using Trie
• Prefix Search using startsWith()
• Counting nodes in a suffix Trie
• Finding shortest unique prefix
• Finding the longest word built one char at a time

Each with:

• Problem statement
• Code walkthrough
• Time & space complexity analysis

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⚙️ How to Use

📥 Clone the Repo

git clone git@github.com:harshityadav-7/DSAWithJava.git
cd DSAWithJava

💻 Run Java Files

Use VS Code or any IDE like IntelliJ, Eclipse.

Or from terminal:

javac FileName.java
java FileName

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👨‍💻 Author

Harshit Yadav
📍 Passionate about DSA, Java, Web Development, and AI
🔗 GitHub: @harshityadav-7

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⭐ If this repo helps you, give it a star!

Feel free to fork it, contribute, and use it in your own prep journey 🚀

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🧠 Future Plans

• Add LeetCode and GFG links to each problem
• Add complexity tables in each topic's README
• Add YouTube video links for explanations
• Add practice sheets and roadmaps

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