fix(java): saveObject in playground and doc

Author: millotp

clients/algoliasearch-client-java-2/algoliasearch-core/src/main/java/com/algolia/utils/ClientOptions.java

@@ -46,6 +46,11 @@ public ClientOptions addAlgoliaAgentSegment(String value, String version) {
     return this;
   }
 
+  public ClientOptions addAlgoliaAgentSegment(String value) {
+    this.algoliaAgentSegments.add(new AlgoliaAgent.Segment(value));
+    return this;
+  }
+
   public List<StatefulHost> getHosts() {
     return this.hosts;
   }

playground/java/src/main/java/com/algolia/playground/Search.java

@@ -3,7 +3,6 @@
 import com.algolia.api.SearchClient;
 import com.algolia.exceptions.*;
 import com.algolia.model.search.*;
-import com.algolia.utils.AlgoliaAgent;
 import com.algolia.utils.ClientOptions;
 import io.github.cdimascio.dotenv.Dotenv;
 import java.util.*;
@@ -17,8 +16,9 @@ public static void main(String[] args) {
 
     SearchClient client = new SearchClient(
       dotenv.get("ALGOLIA_APPLICATION_ID"),
-      dotenv.get("ALGOLIA_SEARCH_KEY"),
-      ClientOptions.build()
+      dotenv.get("ALGOLIA_ADMIN_KEY"),
+      ClientOptions
+        .build()
         .addAlgoliaAgentSegment("test", "8.0.0")
         .addAlgoliaAgentSegment("JVM", "11.0.14")
         .addAlgoliaAgentSegment("no version")
@@ -28,13 +28,14 @@ public static void main(String[] args) {
     String query = dotenv.get("SEARCH_QUERY");
 
     try {
-      List<Map<String, Object>> records = Arrays.asList(Collections.singletonMap("name", "Tom Cruise"), Collections.singletonMap("name", "Scarlett Johansson"));
+      Map<String, Object> obj1 = new HashMap<>();
+      obj1.put("name", "Tom Cruise");
+      Map<String, Object> obj2 = new HashMap<>();
+      obj2.put("name", "Scarlett Johansson");
+      List<Map<String, Object>> records = Arrays.asList(obj1, obj2);
 
       for (Map<String, Object> record : records) {
-        client.saveObject(
-          indexName,
-          record
-        );
+        client.saveObject(indexName, record);
       }
 
       SearchMethodParams searchMethodParams = new SearchMethodParams();

website/docs/clients/guides/send-data-to-algolia.mdx

@@ -93,7 +93,11 @@ foreach ($records as $record) {
 <TabItem value="java">
 
 ```java
-List<Map<String, Object>> records = Arrays.asList(Collections.singletonMap("name", "Tom Cruise"), Collections.singletonMap("name", "Scarlett Johansson"));
+Map<String, Object> obj1 = new HashMap<>();
+obj1.put("name", "Tom Cruise");
+Map<String, Object> obj2 = new HashMap<>();
+obj2.put("name", "Scarlett Johansson");
+List<Map<String, Object>> records = Arrays.asList(obj1, obj2);
 
 for (Map<String, Object> record : records) {
   client.saveObject(