core_java11_fundamentals/lesson2.md

Lesson 2: The Java Programming Environment

Run as server

For headless application (run as server), we can use docker.

After create FILE.java, create a Dockerfile

FROM openjdk:slim-buster
COPY <script location> /usr/src/myapp
WORKDIR /usr/src/myapp
RUN javac <script>.java
CMD ["java", "<script name>"]

Then run and build the Docker image

$ docker build -t my-java-app .
$ docker run -it --rm --name my-running-app my-java-app

If run as desktop application

First, compile Java

$ javac <script>.java

Then, run Java

$ java <script>

Run jshell for interaction

Methods:

• 1: $ jshell
• 2: using docker: docker run --rm -it -v "$(pwd)":/usr/src openjdk:slim-buster