diff --git a/docs/notes/Java IO.md b/docs/notes/Java IO.md
index 34e507bc..a92534f8 100644
--- a/docs/notes/Java IO.md
+++ b/docs/notes/Java IO.md
@@ -98,7 +98,7 @@ Java I/O 使用了装饰者模式来实现。以 InputStream 为例,
- FileInputStream 是 InputStream 的子类,属于具体组件,提供了字节流的输入操作;
- FilterInputStream 属于抽象装饰者,装饰者用于装饰组件,为组件提供额外的功能。例如 BufferedInputStream 为 FileInputStream 提供缓存的功能。
-
+
实例化一个具有缓存功能的字节流对象时,只需要在 FileInputStream 对象上再套一层 BufferedInputStream 对象即可。
diff --git a/docs/notes/pics/9bae24e9-d2f5-4e1d-af42-1a868a5847cf.jpg b/docs/notes/pics/9bae24e9-d2f5-4e1d-af42-1a868a5847cf.jpg
new file mode 100644
index 00000000..b985fdd8
Binary files /dev/null and b/docs/notes/pics/9bae24e9-d2f5-4e1d-af42-1a868a5847cf.jpg differ
diff --git a/docs/pics/9bae24e9-d2f5-4e1d-af42-1a868a5847cf.jpg b/docs/pics/9bae24e9-d2f5-4e1d-af42-1a868a5847cf.jpg
new file mode 100644
index 00000000..b985fdd8
Binary files /dev/null and b/docs/pics/9bae24e9-d2f5-4e1d-af42-1a868a5847cf.jpg differ