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Core‑Java

Java Version
Contributions Welcome

Table of Contents

Overview

Core‑Java is a collection of Java fundamentals and advanced topics designed to help learners solidify their understanding of the language. It includes hands‑on examples across Object Oriented Programming (OOP), Collections, Exception Handling, Threads, File Handling, and more. This repository is suited for both beginners and intermediate learners preparing for interviews, projects, or exams.

Repository Structure

Core‑Java/
├── JavaBasics/
├── OOP_Basics/
├── BasicsOOP/
├── Collections/
├── Exception Handling/
├── File Handling/
├── Threads/
├── .gitignore
└── README.md
  • JavaBasics: Primitive types, control flow statements, loops, basic Java syntax.
  • OOP_Basics / BasicsOOP: Classes, objects, inheritance, polymorphism, encapsulation, abstraction.
  • Collections: Java Collections Framework — Lists, Sets, Maps, etc.
  • Exception Handling: Checked vs unchecked exceptions, try‑catch blocks, custom exceptions.
  • File Handling: I/O operations, file reading/writing, streams.
  • Threads: Multithreading concepts, synchronization, concurrency basics.

Topics Covered

Here are some of the concepts/examples you’ll find:

Topic Key Concepts / Sample Tasks
Java Basics Variables, operators, conditions, loops
OOP Principles Class design, inheritance, interfaces, polymorphism
Collections Framework ArrayList, HashMap, TreeSet, iterators
Exception Handling try, catch, finally, throw/throws, custom exceptions
File & Stream I/O Reading/writing files, buffered streams, serialization
Multithreading & Concurrency Threads, Runnable, synchronized, thread safety

Examples

Some sample files/tasks you might explore:

  • Creating classes for real‑world entities (e.g. Person, Employee) demonstrating inheritance.
  • Implementing custom comparators for sorting collections.
  • Handling I/O with FileReader, BufferedWriter.
  • Using Thread and Runnable to create concurrent tasks; simple synchronization cases.
  • Defining & throwing custom exception types.

Setup & Usage

To run or test any part of this repository locally:

  1. Clone the repository

    git clone https://github.com/krutikapatil19/Core‑Java.git

  2. Navigate to a topic folder

    cd Core‑Java/Threads

  3. Compile Java source

    javac SomeExample.java

  4. Run the compiled class

    java SomeExample

You can also import the code into an IDE (IntelliJ, Eclipse, VSCode) to explore and run more conveniently.

Contributing

Contributions are very welcome! To contribute:

  1. Fork this repository.
  2. Create a new branch: 
    git checkout ‑b feature/YourFeatureName
  3. Add your code, examples or improvements.
  4. Ensure code is well formatted, commented, and includes edge case handling.
  5. Commit your changes with a meaningful message.
  6. Push to your fork and open a Pull Request.

Coding Standards

To keep the code consistent and readable, please follow:

  • Use clear, meaningful names for classes, methods, variables.
  • Keep methods and classes focused (one responsibility).
  • Comment non‑trivial logic.
  • Handle nulls, invalid inputs, edge cases.
  • Follow Java naming conventions: PascalCase for classes, camelCase for methods/variables.
  • Organize imports; avoid unused code.

License

Specify the license under which this project is distributed. If you use MIT (or another), include a LICENSE file with the full text.

Contact

Questions, suggestions or feedback are welcome — feel free to open an issue or submit a PR!

Happy Coding! 🚀