Java Demo Project

This is a Java project that requires Java 21 (LTS) to run.

Prerequisites

Before you begin, ensure you have the following installed:

• Java 21 (LTS)
• Maven
• Git (optional, for version control)

Installation Guide

1. Install Java 21

For macOS:

# Using Homebrew
brew install openjdk@21

# Set up system-wide Java symlink (requires admin password)
sudo ln -sfn /usr/local/opt/openjdk@21/libexec/openjdk.jdk /Library/Java/JavaVirtualMachines/openjdk-21.jdk

# Add Java 21 to your PATH (for zsh shell)
echo 'export PATH="/usr/local/opt/openjdk@21/bin:$PATH"' >> ~/.zshrc
source ~/.zshrc

For Windows:

1. Download OpenJDK 21 from Adoptium
2. Run the installer
3. Add JAVA_HOME environment variable
4. Add Java to your PATH

For Linux:

# Ubuntu/Debian
sudo apt update
sudo apt install openjdk-21-jdk

# Fedora
sudo dnf install java-21-openjdk-devel

2. Verify Java Installation

java -version
# Should show Java 21

3. Clone the Project (if using Git)

git clone [repository-url]
cd demo

4. Build the Project

mvn clean install

5. Run the Project

java -cp target/demo-1.0-SNAPSHOT.jar com.codelab.Main

Project Structure

demo/
├── src/
│   ├── main/
│   │   └── java/
│   │       └── com/
│   │           └── codelab/
│   │               └── Main.java
│   └── test/
│       └── java/
└── pom.xml

Development

This project uses:

• Java 21 (LTS)
• Maven for dependency management and building
• Standard Java project structure -next