Java：如何在命令行输入数据

String input = "";         InputStreamReader in = new InputStreamReader(System.in);         BufferedReader bufferedReader = new BufferedReader(in);         System.out.print("请输入你的姓名：");         try {             input = bufferedReader.readLine();//获得数据         } catch (IOException e) {             e.printStackTrace();             //System.out.println(e.toString());         }         System.out.println(input);