Create Maven-based Java learning project with sample code and tests

[Copilot]

This PR sets up a complete Maven-based Java project structure to serve as a foundation for learning and practicing Java concepts.

What's included

Project Configuration

• pom.xml: Standard Maven project configuration with:
  • Java 17 as the target version
  • JUnit 5 (5.10.0) for unit testing
  • Maven Compiler Plugin (3.11.0) and Surefire Plugin (3.1.2) configured
  • Group ID: com.learning, Artifact ID: java-learning

Directory Structure

Created the standard Maven directory layout:

java-learning/
├── pom.xml
├── src/
│   ├── main/
│   │   ├── java/com/learning/     # Java source files
│   │   └── resources/              # Application resources
│   └── test/
│       ├── java/com/learning/      # Test source files
│       └── resources/              # Test resources
└── README.md

Sample Code

• HelloWorld.java: A simple example class demonstrating proper Java code structure with JavaDoc comments
• HelloWorldTest.java: JUnit 5 test class with two test cases showing basic assertions

Documentation

• Updated README.md: Comprehensive guide including:
  • Project structure overview
  • Prerequisites (Java 17+, Maven 3.6+)
  • Build, test, and run instructions
  • Maven commands reference
  • Guidelines for adding new Java concepts

Configuration

• Updated .gitignore: Added Maven-specific artifacts (target/), IDE files (.idea/, .vscode/), and Maven temporary files

Verification

All components have been tested and verified:

• ✅ Project compiles successfully with mvn clean compile
• ✅ All tests pass with mvn test (2/2 tests passing)
• ✅ JAR packaging works with mvn package
• ✅ Application runs correctly: java -cp target/classes com.learning.HelloWorld

The project is now ready to use as a learning platform where new Java concepts can be added incrementally in the appropriate packages.

Original prompt

Create a maven based java projects. I will use this project to add all concepts of Java.

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