public void setAccountId(String accountId) {
        this.accountId = accountId;
    }
<p>
The <code>AccountId</code> value is the AWS account ID of the account that owns the vault. You can either specify
an AWS account ID or optionally a single '<code>-</code>' (hyphen), in which case Amazon S3 Glacier uses the AWS
account ID associated with the credentials used to sign the request. If you use an account ID, do not include any
hyphens ('-') in the ID.
</p>

@param accountId
       The <code>AccountId</code> value is the AWS account ID of the account that owns the vault. You can either
       specify an AWS account ID or optionally a single '<code>-</code>' (hyphen), in which case Amazon S3
       Glacier uses the AWS account ID associated with the credentials used to sign the request. If you use an
       account ID, do not include any hyphens ('-') in the ID.
aws-java-sdk-glacier/src/main/java/com/amazonaws/services/glacier/model/DeleteVaultNotificationsRequest.java