title: Minimizing Jinternal Frame without clicking the button
body: <p>Is there any way to minimize/maximize the JinternalFrame without clicking the minimize/maximize button at the top-right corner of the jinternalframe?</p>
  
  <p>I followed this thread <a href="https://stackoverflow.com/questions/6476525/programmatically-minimize-a-jinternalframe">programmatically minimize a JInternalFrame?</a>, specifically set </p>
  
  <pre><code>jinterframe.setIcon(false)
  </code></pre>
  
  <p>But i didn't work.</p>
  
  <p>Thanks.</p>