Installing Java

To install Java you need to install the Java Development Kit (JDK). It - can be downloaded from here: https://jdk.java.net/13

You will want to select the zip download for Windows.
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After downloading the zip you will want to unzip it (into a folder, - should by default) and then copy that folder into C:\Program Files\Java\

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When I did this myself, it unzipped into a folder jdk-13.0.1. By the end you should have the following folder - structure: C:\Program Files\Java\jdk-13.0.1

Setting up your environment

In order to make the JDK discoverable by your programs you need to add - the JDK folder to your PATH environment varible. This is best done by first - setting up a varible for the java directory JAVA_HOME that points directly to the directory you copied - the unzipped files into.

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Once you've setup the JAVA_HOME variable - you can add that varible to your PATH point to the subdirectory - /bin. This can be confusing if you haven't - done this before. - Here is a StackOverflow article how to add environments variables in - Java 10.

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Optionally, if you want to test that this worked, you can open up the - command prompt (or powershell) by opening the start menu and typing/looking - for cmd.exe. Then you can type java -version - which will output the version and some additional information. You should - see java version 13.0.1.

IntelliJ Community Edition

I recommend using IntelliJ Community Edition instead of Eclipse. - They're both open source but I use IntelliJ at my job daily and its a - fantastic, out of the box editor. Where Eclipse requires a lot more setup - steps and plugins to get it to be "complete". Feature wise they - do the same things, so everything they do in Udemy via Eclipse should work - in IntelliJ.

Downloading

To Download go to www.jetbrians.com/idea/download - and click the Exe download for community edition.

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Once the download is complete you can run the installer. You should - select your theme, then just use the "Install defaults" option at - the bottom, or just Next through the rest of setup, as you shouldn't - need any additional plugins. And if you do they all can be installed - later

You're Done! You can start Udemy now just ignoring their - install/setup instructions. I have some additional steps below to help - verify everything works and do some basic operatoins in IntelliJ (Create a - Project, Create a class, Run/Debug) but you can refer back to here once you - get there in Udemy

Using IntelliJ

Jetbrains actually has a whole - FAQ/Tutorial section that can help you with any questions too. But here - is a brief overview of the core functions of IntelliJ

Creating a project

When you first open IntelliJ it shows a splash screen where you can open - an existing project or create a new one. You will at first want to create a - new project.

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You want to choose a java (the default) and select the version of the - JDK (should default to 13.0.1, if not click browse and navigate to the - folder you copied it to from the first step: C:\Program Files\Java\jdk-13.0.1.

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Then you can name the project and choose the directory you want to files - in.

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Now you should have a project setup that you can create your program - in!

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Creating a class

To create a class in IntelliJ you should expand the projects menu on th - left side and right click the src folder. You - then select "create class". This will add it directly into your - src folder.

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From here you can start writing code!

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Running a Program

Java code is executed from the main method public - static void main(String[] args). You can run your main method by - either right clicking within it and selecting run. Or when the file - containing your main method is open using the Run button at the top right - of the editor.

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Debugging a Program

To debug you can set breakpoints in your code by selecting the left hand - side by the line numbers. This will add a red dot which tells the program - to pause executing when it reaches the code at that line. To do this you - need to run in debug mode (rather than plain run mode) by right clicking - your main method and choosing Debug, or by using the debug icon at the top - right of the editor window.

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Additional Help

If you need any help at all feel free to text or email. If its a code - issue, either a screenshot of the code or the code itself will help!

Java Setup - Windows

Table of contents

Installing Java

Setting up your environment

IntelliJ Community Edition

Downloading

Using IntelliJ

Creating a project

Creating a class

Running a Program

Debugging a Program

Additional Help