I installed the Prometheus operator in my Kubernetes cluster and can able to execute queries in the Prometheus Query Prompt.

For example

((node_filesystem_avail_bytes{mountpoint="/",fstype!="rootfs"} ))

I want to execute the same command through my java program. Is there any API's available and how to integrate it?

I only saw http://hostname:9090/metrics . But I didn't see any API matching my requirement