public List<Bucket> listBuckets() throws CosClientException, CosServiceException;

// If you only call the “listBuckets” method, set the region to new Region("") when creating cosClient.
List<Bucket> buckets = cosClient.listBuckets();
for (Bucket bucketElement : buckets) {
    String bucketName = bucketElement.getName();
    String bucketLocation = bucketElement.getLocation();
}

public Bucket createBucket(String bucketName) throws CosClientException, CosServiceException;

String bucket = "examplebucket-1250000000"; // Bucket, formatted as BucketName-APPID
CreateBucketRequest createBucketRequest = new CreateBucketRequest(bucket);
// Set the bucket permission to Private (private read/write). Other options include public read/private write and public read/write.
createBucketRequest.setCannedAcl(CannedAccessControlList.Private);
Bucket bucketResult = cosClient.createBucket(createBucketRequest);

public boolean doesBucketExist(String bucketName) 
  throws CosClientException, CosServiceException;

The bucket name entered must be in the format of `BucketName-APPID`.
String bucketName = "examplebucket-1250000000";
boolean bucketExistFlag = cosClient.doesBucketExist(bucketName);

public void deleteBucket(String bucketName) throws CosClientException, CosServiceException;

The bucket name entered must be in the format of `BucketName-APPID`.
String bucketName = "examplebucket-1250000000";
cosClient.deleteBucket(bucketName);