@BeforeClass
    public static void setUp() throws Exception {
        AmazonDynamoDBClient client = new AmazonDynamoDBClient(awsTestCredentials());
        dynamo = new DynamoDB(client);
        setupData(dynamo);
    }
Sample code to update items to a dynamo table.
src/samples/AmazonDynamoDBDocumentAPI/quick-start/com/amazonaws/services/dynamodbv2/document/quickstart/F_UpdateItemTest.java