How to Deploy a Simple Java Application Inside Docker and Execute it as a Containerized Service?| S-Logix

Description:
Create a Java application file (Hello.java)
Write a Dockerfile that builds and runs the Java program
Build the Docker image
Run the Java program using Docker
This demonstrates how Java applications are packaged and executed inside Docker containers.

Step 1 — Create Project Folder

mkdir java-docker
cd java-docker

Step 2 — Create Java Application File
Create Hello.java

Command:

nano Hello.java

Paste:

public class Hello {
    public static void main(String[] args) {
        System.out.println("Java App Running in Docker");
    }
}

Save and exit.

Step 3 — Create Dockerfile
Command:

nano Dockerfile

Paste:

FROM eclipse-temurin:17
COPY Hello.java /app/Hello.java
WORKDIR /app
RUN javac Hello.java
CMD ["java", "Hello"]

Save and exit.

Step 4 — Build the Docker Image
```
docker build -t javaapp .
            
```

Step 5 — Run the Docker Container

docker run javaapp

Output:

Java App Running in Docker

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