title: How to change JDK version for an Eclipse project
body: <p>I need to write a project that's only compatible with Java 1.5. I have Java 1.6 installed. Is there some form of backwards compatibility to get Eclipse to compile with 1.5?</p>
  
  <p>Do I have to install Java 1.5 to get it to show here? Or maybe there is another way?</p>
  
  <p><img src="https://i.stack.imgur.com/P0tcw.png" alt="Enter image description here">.</p>