diff --git a/notes/Java 并发.md b/notes/Java 并发.md
index 31eb48c9..f4a45e3c 100644
--- a/notes/Java 并发.md	
+++ b/notes/Java 并发.md	
@@ -229,6 +229,7 @@ main() 属于非守护线程。
 public static void main(String[] args) {
     Thread thread = new Thread(new MyRunnable());
     thread.setDaemon(true);
+    thread.start();
 }
 ```