title: Windows BAT or CMD: send some data to a localhost udp port
body: <p>I have an app that listens on a localhost port. I want a minimal launcher to bring that app's to the front.</p>
  
  <p>My app is in Java. I don't know how to write any exe files, but I can write bat files, and then make a shortcut that launches the bat file without showing the terminal. I would like to have the bat file send some data to a port (preferably UDP so there will not be any stream overhead).</p>
  
  <p>How can I send data to a UDP port?</p>
  
  <p>One of the things I thought of was <code>nslookup</code>, but that will only connect to port 53 as far as I know.</p>
  
  <p>This only needs to work on Windows. Would like it to work on XP and up, but I can make a workaround if necessary.</p>