diff --git a/java_client/src/main/java/com/example/wxhk/infe/SendMsg.java b/java_client/src/main/java/com/example/wxhk/infe/SendMsg.java
index 4050bd6..8de6496 100644
--- a/java_client/src/main/java/com/example/wxhk/infe/SendMsg.java
+++ b/java_client/src/main/java/com/example/wxhk/infe/SendMsg.java
@@ -8,10 +8,13 @@ import io.vertx.core.json.JsonObject;
  * @author wt
  * @date 2023/06/01
  */
+@FunctionalInterface
 public interface SendMsg<T> extends java.io.Serializable{
 
     default JsonObject toJson(){
         return JsonObject.mapFrom(this);
     }
 
+
+    T of();
 }
diff --git a/java_client/src/test/java/com/example/wxhk/tcp/HttpAsyncUtilTest.java b/java_client/src/test/java/com/example/wxhk/tcp/HttpAsyncUtilTest.java
index 1f317a0..a1c5f5e 100644
--- a/java_client/src/test/java/com/example/wxhk/tcp/HttpAsyncUtilTest.java
+++ b/java_client/src/test/java/com/example/wxhk/tcp/HttpAsyncUtilTest.java
@@ -45,6 +45,5 @@ class HttpAsyncUtilTest {
     void exec2() {
 
 
-
     }
 }
\ No newline at end of file