Basic Java Programs

Collection of small, self-contained Java programs demonstrating common programming concepts and algorithms — aimed at beginners and learners.

Repository: https://github.com/Sbiswas001/Basic-java-programs

Topics: hacktoberfest, hacktoberfest-accepted

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Contents

This repository contains simple Java programs such as:

• Hello World
• Basic calculator (addition, subtraction, multiplication, division)
• Loops and conditionals examples
• Array operations (search, sort)
• Recursion examples (factorial, Fibonacci)
• String manipulation
• Small algorithm demos (e.g., bubble sort, linear search)

(See the repo file list for exact filenames and folder structure.)

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Prerequisites

• Java Development Kit (JDK) 8 or later installed
• Terminal / command prompt or an IDE (IntelliJ IDEA, Eclipse, VS Code + Java extensions)

Check Java installation:

java -version
javac -version

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How to compile and run

From the repository root, navigate to the folder containing the .java file you want to run.

Compile a single file:

javac HelloWorld.java

Run the compiled class:

java HelloWorld

Compile all .java files in a folder:

javac *.java

Run a class (ensure package paths are respected if source files use packages):

java -cp . com.example.MyProgram

If you use an IDE, import the folder as a Java project/module and run classes directly from the IDE.

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Recommended structure

Keep each program in its own file named after the public class, for example:

• HelloWorld.java
• Calculator.java
• FactorialRecursive.java
• BubbleSort.java

Optionally group related examples into folders:

• sorting/
• recursion/
• strings/

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Contributing

Contributions are welcome! Simple ways to contribute:

• Add new beginner-friendly programs
• Improve existing programs with comments and clearer input/output
• Fix typos and README improvements

If you'd like to contribute:

1. Fork the repository
2. Create a descriptive branch (e.g., add/fibonacci-example)
3. Add your program with clear filename and comments
4. Submit a pull request describing what you added

Label your PR appropriately for Hacktoberfest if participating.

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Coding style & guidelines

• Use clear, descriptive class and variable names
• Keep programs small and focused on a single concept
• Add brief comments explaining non-obvious logic
• Prefer simple console input/output for beginner clarity

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License

No license is specified for this repository. If you want others to freely use and contribute, consider adding a license such as MIT. Example: create a LICENSE file with the MIT license text.

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Contact

Repository owner: Sbiswas001 — https://github.com/Sbiswas001

Happy learning and happy coding!