title: Will compiling for Java 1.5 on Java 1.7 still work?
body: <p>I've recently moved to Java 7 in one of my projects. I claim that it can run on Java 1.5 simply because there's nothing I depend on that is in Java 6 or 7. However when compiling today I noticed this:</p>
  
  <pre><code>bootstrap class path not set in conjunction with -source 1.5
  </code></pre>
  
  <p>Google has found little information on this warning. Does this mean that you can't compile to Java 1.5 from Java 1.7?</p>