public void setCertificateArn(String certificateArn) {
        this.certificateArn = certificateArn;
    }
<p>
The CA certificate ARN.
</p>

@param certificateArn
       The CA certificate ARN.
aws-java-sdk-iot/src/main/java/com/amazonaws/services/iot/model/RegisterCACertificateResult.java