diff --git a/SeaweedFS-Java-Client.md b/SeaweedFS-Java-Client.md
index 596cf82..46b793c 100644
--- a/SeaweedFS-Java-Client.md
+++ b/SeaweedFS-Java-Client.md
@@ -12,6 +12,15 @@ Implemented APIs for file system storage. The blob storage APIs is not included.
 * **Monitor Filesystem Events** You can watch all meta data changes recursively under any folder. Common `inotify` only support watch for events under one folder, and not recursively. 
 * **Read Ahead** When reading large files and processing the current chunk, the next chunk will be pre-fetched.
 
+## Note
+
+When creating a `FilerClient` object, the port `18888` in the example is the default gRPC port.
+When starting filer, `weed filer -port=8888`, the port 8888 is default http port.
+ 
+```
+  FilerClient filerClient = new FilerClient("localhost", 18888);
+```
+
 ## Read File
 
 ```