title: Setting java bootclasspath
body: <p>I have JDK6 &amp; 8 installed on my computer, I would like to do</p>
  
  <pre><code>    javac -source 1.6 
  </code></pre>
  
  <p>However I have this warning      </p>
  
  <pre><code>    warning: [options] bootstrap class path not set in conjunction with -source 1.6
  </code></pre>
  
  <p>Does anyone know how to set it? I am not using any IDE and I'm on windows7.
  Thanks!</p>