title: Faceted Project Eclipse environment
body: <p>Even if I have checked this <a href="https://stackoverflow.com/questions/2239959/setting-the-compiler-versions">post</a> and try the solution on it, the problem is still there.</p>
  
  <p>Java compiler level does not match the version of the installed Java project facet. Project-name Unknown    Faceted Project Problem (Java Version Mismatch)</p>