public String getDefaultAvailabilityZone() {
        return this.defaultAvailabilityZone;
    }
<p>
The stack's default Availability Zone, which must be in the specified region. For more information, see <a
href="https://docs.aws.amazon.com/general/latest/gr/rande.html">Regions and Endpoints</a>. If you also specify a
value for <code>DefaultSubnetId</code>, the subnet must be in the same zone. For more information, see the
<code>VpcId</code> parameter description.
</p>

@return The stack's default Availability Zone, which must be in the specified region. For more information, see
        <a href="https://docs.aws.amazon.com/general/latest/gr/rande.html">Regions and Endpoints</a>. If you also
        specify a value for <code>DefaultSubnetId</code>, the subnet must be in the same zone. For more
        information, see the <code>VpcId</code> parameter description.
aws-java-sdk-opsworks/src/main/java/com/amazonaws/services/opsworks/model/CreateStackRequest.java