JTextArea - Dúvida

public void Copiar() throws Exception  {
          Process process = null;
          try {
          process = Runtime.getRuntime().getRuntime().exec("copiar.bat");


          BufferedReader in =
          new BufferedReader(new
          InputStreamReader(process.getInputStream()));


          String line = null;
          while ((line = in.readLine()) != null) {
          
          System.out.println(line);
          }
          }
         catch (Exception e) {
         System.out.println("Problema na copia: "
         +e.toString());
         }