title: javac not recognized
body: <p>What can I do when I keep receiving the error</p>
  
  <blockquote>
    <p>'javac' is not recognized as an internal or external command, operable program or batch file</p>
  </blockquote>
  
  <p>when I want to compile my jar or <code>.class</code> file?</p>
  
  <p>Thanks</p>