InfluxDB Cloud 3.0 is a versatile time series database built on top of the Apache ecosystem, allowing users to query it with the Apache Arrow Flight SQL interface for working with time series data. To query InfluxDB Cloud with this interface using Java, developers need to set up a connection with gRPC and TLS encryption, authenticate with an authentication token, and create a custom interceptor to inject database headers on every request. The code walkthrough demonstrates how to use the Java Flight SQL Client to execute queries on the server, fetching data from the result and printing it as a string. This tutorial is part of Apache Arrow Flight, a framework for building high-performance data services, providing efficient transmission of large datasets over gRPC.