title: IntelliJ Update -> get Error by lambda
body: <p>I updated my IntelliJ IDEA this morning and after that I openend my project and suddenly i get an error in my lambda expressions.</p>
  
  <p>First i got this one:</p>
  
  <pre><code>Lambda expressions not supported at this language level
  </code></pre>
  
  <p>and then I tried to change the Project Langugage level and afterwards set it back to default. Now i get this one:</p>
  
  <pre><code>Error:(39, 46) java: lambda expressions are not supported in -source 1.7
    (use -source 8 or higher to enable lambda expressions)
  </code></pre>
  
  <p>IntelliJ ProjectStructure Options:</p>
  
  <p><a href="https://i.stack.imgur.com/6vtv0.png" rel="noreferrer"><img src="https://i.stack.imgur.com/6vtv0.png" alt="enter image description here"></a></p>
  
  <p>This is my lambda:
  And I say it again before I updated IntellJ it worked:</p>
  
  <pre><code>response.getData().stream().filter(a -&gt; a.getStart_time() &gt; WTStandards.getUnixTime()).forEach(eventList::add);
  </code></pre>