If it's not on Splunkbase, you might be outta luck. You can however contact support or your Splunk account person to request the app to updated.
However, only because Splunkbase says it's not compatible with 7.0, doesn't have to mean it actually isn't. It might simply mean it hasn't been tested (and I'm rather sure this is the case here). If I were you, I'd just try it.
Hope that helps - if it does I'd be happy if you would upvote/accept this answer, so others could profit from it. 🙂
Thanks. As per your screenshot I was able to add the dashboard and after providing the IP address and JMX port of the JBOSS server for the add-on it doesnot show anything in the dashboard. And no errors relating to this in the splunkd logs and splunk-jboss-log file. I have verfied the connectivity from splunk server to the JMX remote port and the port is also open
Did you follow these instructions?
Did you see, that JMX seems to require another Splunk TA to be installed?
I've no experience on JBoss, so I've no idea of the details 😉
I did just install it on my Splunk 7.1 test instance, and although it doesn't come with any prebuilt dashboard, it offers prebuilt dashboard panels.
Therefore, create a new dashboard, select Add Panel..., then choose Add Prebuilt Panel.
See the screenshot on how to do it: