diff --git a/s-day10/src/com/inmind/buffered01/Demo02.java b/s-day10/src/com/inmind/buffered01/Demo02.java
new file mode 100644
index 0000000..efed5ce
--- /dev/null
+++ b/s-day10/src/com/inmind/buffered01/Demo02.java
@@ -0,0 +1,29 @@
+package com.inmind.buffered01;
+
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+
+/*
+字节缓冲流一次读写一个字节数组的方式复制文件
+ */
+public class Demo02 {
+    public static void main(String[] args) throws Exception {
+        //创建字节缓冲输入输出流
+        BufferedInputStream bis = new BufferedInputStream(new FileInputStream("2.jpg"));
+        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("3.jpg"));
+        //一次读写一个字节数组,
+        byte[] bytes = new byte[1024];
+        long start = System.currentTimeMillis();
+        int len;
+        while ((len = bis.read(bytes)) != -1) {
+            bos.write(bytes, 0, len);
+        }
+        long end = System.currentTimeMillis();
+        System.out.println("复制所用时间："+(end - start));//3ms
+
+        bis.close();
+        bos.close();
+    }
+}