How do I get the local hostname if unresolvable through DNS in Java?

Question

This sounds like something that should have been asked before, and it has sort of, but I\'m looking to get the local hostname and IP addresses of a machine even when it is not r

Answer 1

Java will read the /etc/hosts file if there is no DNS configured, or rather the corresponding C functions will.

Answer 2

If you're not against using an external dependency from maven central, I wrote gethostname4j to solve this problem for myself. It just uses JNA to call libc's gethostname function (or gets the ComputerName on Windows) and returns it to you as a string.

https://github.com/mattsheppard/gethostname4j

(I think it's almost exactly what @danny-thomas proposed, but maybe more convenient if you're already using Maven ;)