This repository contains my daily Java practice code and exercise solutions.
From basics to advanced topics — one step at a time toward Java mastery.
- ✅ Basics
- ✅ OOP (Classes, Inheritance, Polymorphism)
- 🚧 Data Structures & Algorithms
- 📈 Streams & Concurrency (coming soon)
| Day | Description | Files |
|---|---|---|
| Day 1 | Introduction to Java basics | BasicSyntax, DataTypes, Variables, Type Casting & Conversion |
| Day 2 | Operators | All operators |
| Day 3 | Control Flow Statements | if, else if, switch,  |
| Day 4 | Loops in Java | for, while, do-while, continue, break, |
| Day 5 | Pattern | 6 different patterns |
| Day 6 | Functions | swap, call by value, overloading, overriding, |
| Day 7 | Advanced Pattern | 8 different pyramids |
| Day 8 | Array & Searching | Basics, linear, binary search, |
| Day 9 | Array | 7 different, |
| Day 10 | Sorting | Bubble, insertion, selection, inbuilt, counting, |
| Day 11 | 2-D Array | diagonal sum, spiral, |
| Day 12 | String & String Builder | Basics, |
| Day 13 | Bit Manipulation | (AND, OR, NOT, XOR, Right & Left Shift), (Get, Set, Clear, Update), |
| Day 14 | OOPs | Encapsulation, Inheritance ,Polymorphism ,Abstraction,getter/setter |
| Day 15 | Recursion Part - 1 | Basics , call stack , |
| Day 16 | Recursion Part - 2 | Advanced practice problem based on recursion |
| Day 17 | Devide & conquere | merge sort , heap sort,sorted & rotated array search |
| Day 18 | Backtracking | Subsetsum,combinationsum,permutation |
| Day 19 | Arraylist |