/*

In programming tradition, we'll start with Hello World. Hello World is

simple: it's a program that prints the text "Hello world!" to the screen.

It's used as a way to ensure that your development pipeline is properly

setup. With that, let's get started.

First, you'll want to download the JDK from Oracle (or OpenJDK if you're

super fancy). JDK is short for Java Development Kit. It has the tools you

need to start writing Java programs. The installation process should be

pretty straightforward, regardless of your platform.

The Java executables _should_ set themselves up in your environment path

(more on pathing in the theory section). If not, you should use your search

engine of choice to find out how to add Java to the path on your system,

e.g. "add Java to Windows path" or "add Java to Mac path" as appropriate.

Once you have the JDK and your path setup, you should try to compile and

run this file. You can compile the file by navigating to this directory

(see command line, if that's not your jam) and entering

"javac HelloWorld.java". After doing so, you'll see a file

HelloWorld.class. This is Java bytecode that you can then run using the

Java virtual machine. Now, run "java HelloWorld". Maaaaaagic :D

We use HelloWorld in the second command because our class below is called

HelloWorld. More on that later.

*/

// This is a single-line comment

/*

This, if you hadn't guessed, is a multi-line comment.

Comments are text that is not executed by the program.

They're often used to add informative "comments" to your code.

*/

// This is a class. We'll cover this later.

public class HelloWorld {

/*

This is the function that runs when you run this class as the main

program. Don't worry about how or why quite yet. Just know it does

the thing.

*/

public static void main(String[] args) {

System.out.println("Hello world!");

/*

This will print out Hello World to your command line. Don't worry

about how or why quite yet. Just know that if you copy this line

and change what's in the quotes, it will print what's in the

quotes to the screen.

In Java, each statement should end with a semicolon. It's frustrating

at first, but you'll get used to it as time goes on.

If you open up command line, navigate to this folder, enter

"javac HelloWorld.java", and enter "java HelloWorld", you'll see

the text "Hello world!" printed to the screen.

This proves that your Java environment is setup properly and that

you can run a simple program successfully! Great job!

*/

}

}