title: Eclipse: false error with jdk7
body: <p>I've been having a problem with eclipse that's been stressing me a lot. Whenever I start a new Java porject, everything goes smoothly and perfect, until I "clean" the project (<em>Project -> Clean...</em>) and everything goes to @#~%&amp;...<br>
  I keep getting:</p>
  
  <ul>
  <li><code>XYZ cannot be resolved to a type</code></li>
  <li><code>Multi-catch parameters are not allowed for source level below 1.7</code></li>
  <li><code>&lt;&gt; operator is not allowed for source level below 1.7</code></li>
  </ul>
  
  <p>That's very nice, only that I am importing all required classes and I do have 1.7 since the begginig. It's the only version I've installed. I've already tried <a href="https://stackoverflow.com/questions/19382370/openjdk-1-7-in-eclipse-operator-is-not-allowed-for-source-level-below-1-7">this</a> and other similar responses for the last few days with no avail.<br>
  A solution was to create a new project, copy and paste all packages/clases, which worked for a while, but I added UMLet to the project and again... Removing UMLet plugin did nothing for me.</p>
  
  <p><strong>BTW</strong>, even with the "errors", my project runs without any problem, therefore I know they're not real. I could keep working, but then, I can't see when a real error arises...
  Does anyone got a final solution to get rid of this false errors?</p>
  
  <p><strong>EDIT:</strong>
  I forgot to mention that I'm working with Kepler.</p>
  
  <p><strong>EDIT 2:</strong></p>
  
  <p>Here are screen captures with the requested information.</p>
  
  <p><img src="https://i.stack.imgur.com/4B6TO.png" alt="Java Build Path"></p>
  
  <p><img src="https://i.stack.imgur.com/71qnB.png" alt="Java Compiler"></p>