java中常用的一些操作

Object result = ....;            JSONObject dayin = JSONObject.fromObject(result);            System.out.println("=========");            System.out.println("i:"+dayin.get("i"));            System.out.println("map:"+dayin.get("map"));            System.out.println("array:"+dayin.get("array"));            System.out.println("pojo:"+dayin.get("pojo"));            System.out.println("s:"+dayin.get("s"));            System.out.println("complext:"+dayin.get("complex"));            //System.out.println(dayin);            System.out.println("=========");

BufferedReader localReader = new BufferedReader(new InputStreamReader(System.in));String msg = null;while ((msg = localReader.readLine()) != null) {    System.out.println(msg);//打印从标准输入读取到的数据    process(msg);              if (msg.equals("bye"))//当输入 bye 时 结束        break;}     

System.in 表示标准输入，一般指键盘。
建立输入流，从标准输入读取数据到缓冲区中。