Reactive-Programming-Masterclass

Java and Maven Installation Guide

Check if Java is Already Installed: To determine if Java is already installed on your system, open a terminal or command prompt and run the following command:

java -version

If you see a Java version displayed, it means Java is already installed. You can skip to the Maven installation section.

Install Java: If Java is not installed, you can download and install it from the official Oracle website or use OpenJDK, which is an open-source alternative.

Oracle Java (Note: Requires Oracle account): Visit the Oracle Java Downloads page and download the Java SE Development Kit (JDK) for your operating system. Follow the installation instructions for your platform.
OpenJDK (Linux/macOS): On Linux and macOS, you can install OpenJDK using package managers like apt (for Debian/Ubuntu) or brew (for macOS).

For Debian/Ubuntu:
```
sudo apt update
sudo apt install openjdk-11-jdk
```
For macOS (using Homebrew):
```
brew tap AdoptOpenJDK/openjdk
brew install adoptopenjdk11
```
OpenJDK (Windows): You can download OpenJDK for Windows from the AdoptOpenJDK website and follow the installation instructions.

Verify Java Installation: To verify that Java has been successfully installed, run the following command again:

java -version

Download Maven: Visit the Apache Maven Download page and download the latest stable version of Apache Maven. Choose the binary zip archive for your operating system.
Install Maven:

Extract the downloaded zip archive to a location on your system.
Add the bin directory of the extracted Maven folder to your system's PATH environment variable. This allows you to run Maven from any directory in your terminal.

Verify Maven Installation: Open a new terminal window and run the following command to verify that Maven has been successfully installed:

mvn -version

You should see Maven version information.

$ mvn clean install