!747
!awt {
!actionListener {
!pcall {

m {
  static S vmName = "This is a JavaX VM."; // Use any VM
  static int delay = 1000;
  static int len;
  
  static JTextArea textArea;
  
  p {
    S output = unquote(sendToLocalBot(vmName, "get output"));
    len = l(output);
    textArea = showText("Output of VM " + quote(vmName), output);
    installTimer(textArea, runnable {
      S s = unquote(sendToLocalBot(vmName, "get output substring from *", len));
      textArea.append(s);
      len += l(s);
    }, delay);
  }
}

Began life as a copy of #1001729