SDK error message on IntelliJ IDE
<p>I am new to this community and have this problem:</p>

<p>I downloaded the IntelliJ IDEA IDE for Windows (x64) and i can not run a single line of code, there always comes the error message:</p>

<blockquote>
  <p>Cannot start compiler: the SDK is not specified for module "XY".
  Specify the SDK at Project Structure dialog.</p>
</blockquote>

<p>I followed the <a href="https://www.jetbrains.com/help/idea/2016.2/sdk.html" rel="nofollow">instructions on their Website</a> and downloaded the SDK for Windows x64 <a href="http://www.oracle.com/technetwork/java/javase/downloads/index.html" rel="nofollow">here</a>.</p>

<p>Now I used to set up everything, but it doesn't work as planned. In fact it is the same error as before.</p>

<p>I am glad for any help, thanks! :)</p>