title: Compiling java 7 for java 6 with Eclipse
body: <p>I need to compile a project for Java 6 to use with java 6 or 7 (I can't upgrade all of the computers in my life). I've been searching all over and found somewhat <a href="https://stackoverflow.com/questions/8869869/is-there-a-java-7-to-java-6-converter">helpful</a> <a href="https://stackoverflow.com/questions/7661980/compiling-java-7-to-java-6">stuff</a>, but I'm rather new to java - I don't understand much of how to use the presented alternatives (ant-build, Maven, javac).</p>
  
  <p>My program does not use any API methods that are not available in Java 6, but it does use the API of another external .JAR (it is a basic plugin for an example program)</p>
  
  <p>Is there a simple way to do this with Eclipse's Export function, or do I need to use some other program/method?</p>
  
  <p>If I need to use something other than Eclipse, how would I best go about doing it for a multi-class, multi-package file dependent on another external .jar's API?</p>