updated POM to use JDK 21

Author: scmacdon

javav2/example_code/ec2/src/main/java/com/example/ec2/CreateLaunchTemplate.java

@@ -1,3 +1,6 @@
+// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0
+
 package com.example.ec2;
 
 import software.amazon.awssdk.regions.Region;
@@ -11,19 +14,34 @@
 public class CreateLaunchTemplate {
 
     public static void main(String[] args) {
-        String groupName = "ScottASG606" ; //rgs[0];
-        String launchTemplateName = "MyTemplate5" ;//args[1];
-        String vpcZoneId = "subnet-0ddc451b8a8a1aa44" ; //args[2];
-        String instanceType= "t2.2xlarge" ;
-        String imageId = "ami-0f6832b69407e9746" ;
-        String keyName = "TestKeyPair";
+        final String usage = """
+            Usage:
+               <launchTemplateName> <instanceType> <imageId> <keyName>
+               
+            Where:
+               launchTemplateName - The name of the launch template to create.
+               instanceType       - The EC2 instance type (e.g., t2.2xlarge).
+               imageId            - The AMI ID for the instance (e.g., ami-0f6832b69407e9746).
+               keyName            - The name of the key pair for SSH access.
+            """;
+
+        if (args.length != 4) {
+            System.out.println(usage);
+            System.exit(1);
+        }
+
+        String launchTemplateName = args[0];
+        String instanceType = args[1];
+        String imageId = args[2];
+        String keyName = args[3];
 
         Ec2Client ec2 = Ec2Client.builder()
                 .region(Region.US_EAST_1)
                 .build();
 
         createLaunchTemplate(ec2, launchTemplateName, instanceType, imageId, keyName);
     }
+
     public static void createLaunchTemplate(Ec2Client ec2, String launchTemplateName, String instanceType, String imageId, String keyName) {
         try {
             RequestLaunchTemplateData launchTemplateData = RequestLaunchTemplateData.builder()

javav2/example_code/ecs/src/test/java/EcsTest.java

@@ -6,7 +6,6 @@
 import org.junit.jupiter.api.*;
 import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
 import static org.junit.jupiter.api.Assertions.assertFalse;
-import software.amazon.awssdk.auth.credentials.EnvironmentVariableCredentialsProvider;
 import software.amazon.awssdk.regions.Region;
 import software.amazon.awssdk.services.ecs.EcsClient;
 import software.amazon.awssdk.services.secretsmanager.SecretsManagerClient;

javav2/example_code/firehose/src/test/java/FirehoseTest.java

@@ -136,5 +136,4 @@ public String getTextValue() {
             return textValue;
         }
     }
-
 }