title: Can't configure Scala in Intellij IDEA 13
body: <p>I entered Scala courses on Coursera and used to write Scala projects in <code>Eclipse Indigo</code>. All worked well. But now I gonna to convert to my favorite IDE - Intellij IDEA. </p>
  
  <p>But I can't configure it for Scala usage.</p>
  
  <p><strong><em>What I've already done:</em></strong></p>
  
  <ol>
  <li>Install Scala, set system <code>SCALA_HOME</code> variable</li>
  <li>Install SBT</li>
  <li>Install Scala plugin on Intellij IDEA</li>
  </ol>
  
  <p><strong><em>What a problem:</em></strong></p>
  
  <ol>
  <li><p>When I import coursera assignments, Intellij doesn't see some classes like <code>List</code>, <code>Array</code> etc. For example, when I try to import it via <code>Alt+Enter</code> key it propose me <code>java.jang.reflect.Array</code>, <code>java.sql.Array</code>, <code>com.sun.xml....Array</code>. So I can't import Scala Array with <code>tail</code> and <code>head</code> methods.</p></li>
  <li><p>When I try: <code>New Project</code> -> <code>Scala Module</code> the are to problems:</p>
  
  <p>a) When I choose <code>Set Scala Home</code> it complains that there are missing files</p>
  
  <p>b) When I choose <code>Existent Library</code> there is nothing to choose in <code>Compiler</code>/<code>Standart</code> fields.</p></li>
  </ol>
  
  <p><img src="https://i.stack.imgur.com/5IYce.png" alt="enter image description here"></p>
  
  <p><strong><em>Question:</em></strong></p>
  
  <p>How to configure Intellij properly?</p>