// A bucket name consists of bucketname-appid. You must include the appid. You can view bucket names in the COS console. https://console.tencentcloud.com/cos5/bucket
String bucket = "examplebucket-1250000000";
String cosPath = "exampleobject"; // The location identifier of the object in the bucket, i.e., the object key.
RestoreRequest restoreRequest = new RestoreRequest(bucket, cosPath);
restoreRequest.setExpireDays(5); // Retain for 5 days
restoreRequest.setTier(RestoreConfigure.Tier.Standard); // Standard restore mode

cosXmlService.restoreObjectAsync(restoreRequest, new CosXmlResultListener() {
    @Override
    public void onSuccess(CosXmlRequest request, CosXmlResult result) {
        RestoreResult restoreResult = (RestoreResult) result;
    }

    // If you call the API using kotlin, note that the exception in the callback method must be nullable. Otherwise, the onFail method will not be called, as follows:
    // The type of clientException is CosXmlClientException?, and the type of serviceException is CosXmlServiceException?
    @Override
    public void onFail(CosXmlRequest cosXmlRequest,
                       @Nullable CosXmlClientException clientException,
                       @Nullable CosXmlServiceException serviceException) {
        if (clientException != null) {
            clientException.printStackTrace();
        } else {
            serviceException.printStackTrace();
        }
    }
});