public void setDomainName(String domainName) {
        this.domainName = domainName;
    }
<p>
A name for the domain you are creating. Allowed characters are a-z (lower-case letters), 0-9, and hyphen (-).
Domain names must start with a letter or number and be at least 3 and no more than 28 characters long.
</p>

@param domainName
       A name for the domain you are creating. Allowed characters are a-z (lower-case letters), 0-9, and hyphen
       (-). Domain names must start with a letter or number and be at least 3 and no more than 28 characters
       long.
aws-java-sdk-cloudsearch/src/main/java/com/amazonaws/services/cloudsearchv2/model/CreateDomainRequest.java