import java.io.*;
class BISDemo
{
public static void main(String args[])throws IOException
{
String s="Beauty lies in lover's eyes.";
byte buf[]=s.getBytes();
ByteArrayInputStream in=new ByteArrayInputStream(buf);
BufferedInputStream f=new BufferedInputStream(in);
int c;
while((c=f.read())!=-1)／／我的疑问在这里！.read不是返回的是实际读取的字节树吗？但是为什么输出确是Beauty lies in lover's eyes.呢　？
{System.out.print((char)c);}
}
}

public int read()
      throws IOException
See the general contract of the read method of InputStream.

Overrides:
read in class FilterInputStream
Returns:
the next byte of data, or -1 if the end of the stream is reached.
Throws:
IOException - if an I/O error occurs.
See Also:
FilterInputStream.in

read返回的int代表的是字符的ASIC码，用System.out.print(c+" ");试试就知道了