AWS code-library documentation change

Service: code-library · 2026-01-16 · Documentation low

File: code-library/latest/ug/controltower_example_controltower_Hello_section.md

Summary

Added Java SDK 2.x code example demonstrating how to list AWS Control Tower baselines, including error handling for AccessDeniedException

Security assessment

The change adds a routine code example for Control Tower API usage. While it includes AccessDeniedException handling, this is standard permission error handling and doesn't indicate a specific security vulnerability or weakness being addressed. No security features or vulnerabilities are documented.

Diff

diff --git a/code-library/latest/ug/controltower_example_controltower_Hello_section.md b/code-library/latest/ug/controltower_example_controltower_Hello_section.md
index 3e64abd3d..068b090d7 100644
--- a//code-library/latest/ug/controltower_example_controltower_Hello_section.md
+++ b//code-library/latest/ug/controltower_example_controltower_Hello_section.md
@@ -98,0 +99,66 @@ There's more on GitHub. Find the complete example and learn how to set up and ru
+Java
+    
+
+**SDK for Java 2.x**
+    
+
+###### Note
+
+There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/controltower#code-examples). 
+    
+    
+    public class HelloControlTower {
+    
+        public static void main(String[] args) {
+            try {
+                ControlTowerClient controlTowerClient = ControlTowerClient.builder()
+                    .build() ;
+                helloControlTower(controlTowerClient);
+            } catch (ControlTowerException e) {
+                System.out.println("Control Tower error occurred: " + e.awsErrorDetails().errorMessage());
+            }
+        }
+    
+        /**
+         * Use the AWS SDK for Java (v2) to create an AWS Control Tower client
+         * and list all available baselines.
+         * This example uses the default settings specified in your shared credentials
+         * and config files.
+         *
+         * @param controlTowerClient A ControlTowerClient object. This object wraps
+         *                          the low-level AWS Control Tower service API.
+         */
+        public static void helloControlTower(ControlTowerClient controlTowerClient) {
+            System.out.println("Hello, AWS Control Tower! Let's list available baselines:\n");
+            
+            ListBaselinesIterable paginator = controlTowerClient.listBaselinesPaginator(
+                    ListBaselinesRequest.builder().build());
+            List<String> baselineNames = new ArrayList<>();
+            
+            try {
+                paginator.stream()
+                    .flatMap(response -> response.baselines().stream())
+                        .forEach(baseline -> baselineNames.add(baseline.name()));
+    
+                System.out.println(baselineNames.size() + " baseline(s) retrieved.");
+                for (String baselineName : baselineNames) {
+                    System.out.println("\t" + baselineName);
+                }
+    
+            } catch (ControlTowerException e) {
+                if ("AccessDeniedException".equals(e.awsErrorDetails().errorCode())) {
+                    System.out.println("Access denied. Please ensure you have the necessary permissions.");
+                } else {
+                    System.out.println("An error occurred: " + e.getMessage());
+                }
+            }
+        }
+    }
+    
+    
+
+  * For API details, see [ListBaselines](https://docs.aws.amazon.com/goto/SdkForJavaV2/controltower-2018-05-10/ListBaselines) in _AWS SDK for Java 2.x API Reference_. 
+
+
+
+