diff --git a/tests/examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JDBCConnectorChecker.java b/tests/examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JDBCConnectorChecker.java
index 1e801bc65894ef437ee41d692f9ef725b4f639ef..74e586d7fdf1a0f8ad65a807134caae7e05f6d4a 100644
--- a/tests/examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JDBCConnectorChecker.java
+++ b/tests/examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JDBCConnectorChecker.java
@@ -11,7 +11,6 @@ public class JDBCConnectorChecker {
     private static String tbName = "weather";
     private Connection connection;
 
-
     /**
      * get connection
      **/
@@ -170,5 +169,4 @@ public class JDBCConnectorChecker {
         checker.close();
     }
 
-
 }