键盘输入
BufferedReader bufr = new BufferedReader(new InputStreamReader(System.in));
分开写也就是
//             获取键盘录入对象
//                InputStream in = System.in;
//               
//                //将字节流对象传承字符流对象，使用转换流  InputStreamReader
//                InputStreamReader isr = new InputStreamReader(in);
//               
//                //为了提高效率，将字符串进行缓冲区技术高效操作，使用BufferedReader
//                BufferedReader bufr = new BufferedReader(isr);


屏幕显示
BufferedWriter bufw = new BufferedWriter(new OutputStreamWriter(System.out));
分开写
//                OutputStream out = System.out;
//                OutputStreamWriter osw = new OutputStreamWriter(out);
//                BufferedWriter bufw = new BufferedWriter(osw);

键盘输入
BufferedReader bufr = new BufferedReader(new InputStreamReader(System.in));
分开写也就是
//             获取键盘录入对象
//                InputStream in = System.in;
//               
//                //将字节流对象传承字符流对象，使用转换流  InputStreamReader
//                InputStreamReader isr = new InputStreamReader(in);
//               
//                //为了提高效率，将字符串进行缓冲区技术高效操作，使用BufferedReader
//                BufferedReader bufr = new BufferedReader(isr);


屏幕显示
BufferedWriter bufw = new BufferedWriter(new OutputStreamWriter(System.out));
分开写
//                OutputStream out = System.out;
//                OutputStreamWriter osw = new OutputStreamWriter(out);
//                BufferedWriter bufw = new BufferedWriter(osw);