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Examples

Java Dockerized App

Building a Dockerized App

Java Dockerized app uses Dockerfile for deployment.

Introduction to Docker and Java

Docker is a platform that allows developers to automate the deployment of applications inside lightweight, portable containers. A Dockerized Java app leverages a Dockerfile to streamline and simplify the deployment process.

In this guide, we will demonstrate how to create a Dockerized Java application by writing a Dockerfile, building a Docker image, and running the application in a container.

Prerequisites

  • Java Development Kit (JDK) installed
  • Docker installed on your system
  • A basic understanding of Java and Docker concepts

Creating a Simple Java Application

Let's start by creating a simple Java application. We'll have a basic HelloWorld class that outputs 'Hello, Docker!' to the console.

Writing a Dockerfile for the Java App

A Dockerfile is a text document that contains all the commands to assemble an image. Below is an example of a Dockerfile for our Java application:

Building the Docker Image

To build the Docker image, navigate to the directory containing your Dockerfile and Java files, and execute the following command:

Running the Docker Container

Once the image is built, you can run it using the following command:

This command will start a container from the my-java-app image and execute the Java application, printing 'Hello, Docker!' to your console.

Conclusion

By following these steps, you have successfully Dockerized a Java application. This approach simplifies deployment and ensures consistency across different environments. In the next part of our series, we'll explore using Hibernate for querying a database.

Examples

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Hibernate Query