title: Environment variable to control java.io.tmpdir?
body: <p>I've used the <code>TMP</code> environment variable to control things like where gcc writes it's temporary files, but I can't seem to find an equivalent for java's <a href="http://java.sun.com/javase/6/docs/api/java/io/File.html#createTempFile%28java.lang.String,%20java.lang.String,%20java.io.File%29" rel="noreferrer">createTempFile</a> API.</p>
  
  <p>Does such an environment variable exist?</p>