是用来将流里的东西一个个用二进制的方式读出来.
程序为:
        BufferedReader br =
            new BufferedReader(
                new InputStreamReader(
                    new FileInputStream("C:\\WUTemp\\temp.txt")));
        int msg = 0;
        while ((msg = br.read()) != -1) {
            System.out.println(msg);
        }
    }
temp.txt里的内容是:
qqqqqqq
aaa
bbb输出结果为:
113
113
113
113
113
113
113
13
10
97
97
97
13
10
98
98
98