Hello World Java App with Docker and Docker Compose

Overview

This project demonstrates how to containerize a simple Java "Hello World" application using Docker. It includes two versions:

• A standalone Dockerized Java app.
• A Docker Compose setup for container orchestration.

Folder Structure

hello_world_dockerfile/      # Standalone Docker setup
  |- Dockerfile              # Dockerfile to build the Java app image
  |- pom.xml                 # Maven build file
  |- src/                    # Java source code
  |- target/                 # Compiled output

docker-compose/              # Docker Compose version
  |- docker-compose.yml      # Defines service(s) and image build
  |- Dockerfile              # Dockerfile to build the Java app image
  |- pom.xml, src/, target/  # Same as above

Prerequisites

• Docker
• Docker Compose (only for compose version)
• Java JDK 8+
• Maven

Running the App (Standalone Docker)

1. Navigate to the folder:

   cd hello_world_dockerfile

2. Build the Maven project:

   mvn clean package

3. Build the Docker image:

   docker build -t hello-world-java .

4. Run the Docker container:

   docker run --rm hello-world-java

Running with Docker Compose

1. Navigate to the folder:

   cd docker-compose

2. Build and start the services:

   docker-compose up --build

3. To stop:

   docker-compose down

Output

You should see something like:

Hello, World from Java!

License

This project is for educational purposes.

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Feel free to customize the app further or integrate with other services using Docker Compose!