All PaaS products should only be used for testing and developing purposes.
Destroy the clusters when you no longer need them, do not saturate the service.
You can use happybase. There is a 'test' table you can use to verify everything works:
import happybase connection = happybase.Connection(host='10.121.243.250') test = connection.table('test') for k, d in test.scan(): print k, d
To connect using java you can use our Sample Java HBaseclient and modify the hbase.zookeeper.quorum to reflect the right IP of your instance
The example App can be built using maven
mvn package java -jar target/hbaseclient-0.1.0.jar