gistfile1.java

    public Object execute(ExecutionEvent event) throws ExecutionException {
      InputDialog dlg = new InputDialog(
          HandlerUtil.getActiveShellChecked(event), "Title",
          "Enter text", "Initial value", null);
      if (dlg.open() == Window.OK) {
        // User clicked OK; run perl
        String input = dlg.getValue();
        // TODO:do something with value
      }
      return null;
    }