Docker could not find or load main class. Caused by: java.lang.ClassNotFoundException: src.com.company.Main.java

Question

I am new to learning Docker, and followed a tutorial to make a small Hello World application to dockerize. I used Intellij template to generate a main method, which lies in the "com.company" package. All the method does is print out "Hello World!".

The problem is when I try to run the image from the terminal, it gives me this error:

Error: Could not find or load main class src.com.company.Main.java
Caused by: java.lang.ClassNotFoundException: src.com.company.Main.java

I made a Docker file that looks like this:

FROM openjdk:11

RUN mkdir /app

COPY out/production/DockerTestApp/com/company/Main.class/ /app

WORKDIR /app

CMD java src/com/company/Main.java

For the "COPY" path, I just copied the Content Root path of the Main class in the "out" folder.

For the CMD path, I copied the Content Root path in the "src" folder.

This is the command I use to build the image(I give it a new TAG everytime):

docker build -t hello-world:3.0 .

I have tried writing the paths differently and creating the image again, but I just dont understand how Im supposed to write it.

I appreciate your help!