title: Eclipse Updating the compiler compliance to 1.7
body: <p>I am having some trouble updating the compiler compliance of my eclipse workspace (I am actually using RTC, but it is essentially eclipse).
  Currently, it uses a jdk of 1.6 so I can change the JDK compliance to a limit of 1.6.</p>
  
  <p>However, I am using jdk 1.7 for my project -I have added it as a JRE - </p>
  
  <pre><code>preferences --&gt; Java --&gt; Installed JRE --&gt; added jre with the jdk 1.7 directory.
  </code></pre>
  
  <p>However, even though I use this as the default JRE it does not allow me to change the compiler compliance level to 1.7.</p>
  
  <p>I am guessing that there is something I am missing.</p>
  
  <p>Any help would be greatly appreciated</p>