public static void main(String args[]) throws IOException{
        InputStream in=System.in;

        InputStreamReader isr=new InputStreamReader(in);//字节流转换成字符流
        BufferedReader bfr=new BufferedReader(isr);//进行缓冲区 高效操作
//        BufferedReader bfw=new BufferedReader(new InputStreamReader(System.in));键盘录入读取
//        BufferedReader bfw=new BufferedReader(new InputStreamReader(new FileInputStream("dem.txt")));从文件中读取
        OutputStream os=System.out;
        OutputStreamWriter writer=new OutputStreamWriter(os);
        BufferedWriter bfw=new BufferedWriter(writer);
//        BufferedWriter bfw=new BufferedWriter(new OutputStreamWriter(System.out)); 在控制台显示
//        BufferedWriter bfw=new BufferedWriter(new OutputStreamWriter(new FileOutputStream("dem.txt")));在文件中显示
        String line=null;
分享下笔记　只看不写真心不行

多谢分享

我还没学到楼主那里。。只看不写真心不行。赞