public void setPrivateDnsName(String privateDnsName) {
        this.privateDnsName = privateDnsName;
    }
<p>
The private DNS name of the instance.
</p>

@param privateDnsName
       The private DNS name of the instance.
aws-java-sdk-emr/src/main/java/com/amazonaws/services/elasticmapreduce/model/Instance.java