Java Basics - Hello World

So what do we need to program anything in Java? - Java Development Kit - Editor / IDE How to install this depends on the system you are using. You can get the JDK from [oracle](http://www.oracle.com/technetwork/java/javase/downloads/index.html). Once installed, you should be able to call `java -version` and `javac -version`, which would print out the version you've installed.  Then you need an editor. Source files are plain text-files, so you could use the standard notepad in windows, but there are Integrated Development Environments (IDE) available that help you write your code. Usually you would choose from [Eclipse](https://eclipse.org/), [NetBeans](https://netbeans.org/), and [IntelliJ IDEA](https://www.jetbrains.com/idea/), but you also can use [Visual Studio Code](https://code.visualstudio.com/), [Sublime](https://www.sublimetext.com/), [emacs](https://www.gnu.org/software/emacs/), [vim](http://vim.org/) or any other editor that can edit text-files.