add Hello, World!

Author: ManfredLange

HelloWorld.java

@@ -0,0 +1,5 @@
+class HelloWorld {
+   public static void main(String[] args) {
+       System.out.println("Hello, World!"); 
+   }
+}

README.md

@@ -1 +1,24 @@
-# dev-container-java
+# dev-container-java
+
+An opinionated dev container for Java and VS Code
+
+## Prerequisites
+
+To make best use of this repository, you need the following:
+
+- Visual Studio Code
+- VS Code extension "Remote Development"
+- Docker Desktop (MacOS, Windows) or docker engine (Linux)
+- git client (https://git-scm.com/downloads)
+
+## Getting Started
+
+Once you have the container running, open a terminal inside VS Code and execute the following sequence of commands:
+
+```bash
+cd /src
+javac HelloWorld.java
+java HelloWorld
+```
+
+All going to plan, this will output "Hello, world!" in the console.