请在下列程序的空白处，填上适当的内容：
Import java.awt.*;
Import java.util.*;
Class BufferTest
Public static void main(string args[])
Throws IOException
FileOutputStream unbuf=
new FileOutputStream("test.one");
BufferedOutputStream buf=
new______(new FileOutputStream("test.two"));
System.out.println
("write file unbuffered:"+time(unbuf)+"ms");
System.out.println
("write file buffered:"+time(buf)+"ms");
Static int time(OutputStream os)
Throws IOException
Date then=new Date();
for(int i=0;i＜50000;i++)
os.write(1);
os.close();
return(int)(()new Date()).getTime()-then.getTime());
