diff --git a/notes/Java 容器.md b/notes/Java 容器.md
index 84189928..e42a42f0 100644
--- a/notes/Java 容器.md	
+++ b/notes/Java 容器.md	
@@ -738,7 +738,7 @@ HashMap 构造函数允许用户传入的容量不是 2 的 n 次方，因为它
 
 ```
 mask |= mask >> 1    11011000
-mask |= mask >> 2    11111100
+mask |= mask >> 2    11111110
 mask |= mask >> 4    11111111
 ```