Welcome to the 🌟 Ultimate Java + DSA Guide 🌟 – your all-in-one 🔥 repository to master Java programming, crack Data Structures & Algorithms, and solve top LeetCode problems for interviews! 💼🧠
👨💻 JAVA FUNDAMENTALS
🔹 Variables, Data Types, Input/Output
🔹 Conditionals & Loops 🔁
🔹 Arrays, Strings 🔤
🔹 Functions & Recursion 🔂
🔹 Object-Oriented Programming (Classes, Inheritance, Polymorphism) 🧱
📐 DATA STRUCTURES
📊 Arrays & 2D Arrays
🧵 Linked Lists (Singly, Doubly)
🧱 Stacks & 🪜 Queues
🧠 HashMaps, HashSets
🌳 Trees (Binary Tree, BST, AVL)
🔗 Graphs (DFS, BFS, Adjacency List/Matrix)
🧺 Heaps, Tries
🧩 ALGORITHMS
🔍 Searching (Linear, Binary)
🔃 Sorting (Bubble, Selection, Merge, Quick) 🎯
🔁 Recursion & Backtracking
💰 Greedy Algorithms
🚪 Sliding Window & 🏃 Two Pointers
💥 Divide & Conquer
🧠 Dynamic Programming (Memoization & Tabulation)
💻 LEETCODE PROBLEM BANK
💡 Top 100 Interview Questions
🧮 Array & String Challenges
🌐 Graph, Tree & Recursion Mastery
🧩 DP & Backtracking
✅ Clean, Optimal, and Well-Commented Solutions
- 🧬 Clone this repository:
git clone https://github.com/your-username/java-dsa-complete.git
-
💻 Open in IntelliJ, VS Code, or Eclipse
-
🚀 Run individual
.java
files to test and learn
- 📖 Everything from Java Basics → Advanced DSA
- 🔥 Built for beginners, students, and job-seekers
- 🧠 Real-world interview-focused patterns
- ✍️ Well-structured, clean, and commented code
- 🚀 Boost your confidence before interviews (FAANG/MAANG ready!)
Let's grow this together! 🫱🏽🫲🏽
- 🍴 Fork this repo
- 📂 Create a new branch:
git checkout -b feature-name
- 💬 Commit your changes
- 🚀 Open a Pull Request
If this helped you:
🌟 Star it
🍴 Fork it
👯 Share it
🔥 Use it
"Code. Practice. Repeat. That's how legends are made." 💯
Licensed under the MIT License 📄