// Remote ctrl-break. The output of the ctrl-break actions can
    // be read from the input stream.

    public InputStream remoteDataDump(Object ... args) throws IOException {

  {- -------------------------------------------
  (1) executeCommand() を呼び出し, 
      HotSpot に "threaddump" 処理を実行させる.
      ---------------------------------------- -}

            return executeCommand("threaddump", args);
        }