docs: update java demo code

docs-en/05-develop/01-connect/01-python.md

@@ -13,12 +13,12 @@ pip3 install taospy>=2.3.3
 
 You'll need to have Python3 installed.
 
-## Config
+## Config {#config}
 
-Run this command in your terminal to save your url and token as variables:
+Run this command in your terminal to save your URL and token as variables:
 
 ```bash
-export TDENGINE_CLOUD_URL=<url>
+export TDENGINE_CLOUD_URL=<URL>
 export TDENGINE_CLOUD_TOKEN=<token>
 ```
 
@@ -29,7 +29,7 @@ You should replace above placeholders as real values. To obtain these values, pl
 :::
 <!-- exclude-end -->
 
-## Connect
+## Connect {#connect}
 
 ```python
 import taosrest

docs-en/05-develop/01-connect/02-java.md

@@ -23,7 +23,7 @@ dependencies {
 }
 ```
 
-## Config
+## Config {#config}
 
 Run this command in your terminal to save your url and token as variables:
 
@@ -40,20 +40,19 @@ You should replace above placeholders as real values. To obtain these values, pl
 :::
 <!-- exclude-end -->
 
-## Connect
+## Connect {#connect}
 
 ```java
-import com.taosdata.jdbc.TSDBDriver;
-
+import com.taosdata.jdbc.rs.RestfulConnection;
 import java.sql.Connection;
-import java.sql.SQLException;
 
 
 public class ConnectCloudExample {
-    public static void main(String[] args) throws SQLException {
+    public static void main(String[] args) throws Exception {
         String url = System.getenv("TDENGINE_CLOUD_URL");
         String token = System.getenv("TDENGINE_CLOUD_TOKEN");
-        Connection conn = TSDBDriver.connect(url, token); // demo code for discussion.
+        // create a standard JDBC connection.
+        Connection conn = new RestfulConnection(url, token);
     }
 }
 ```