java - What localhost property is guaranteed to be unique across OSes and regardless of network? -

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is there single property concerning local machine guaranteed unique on both windows , os x regardless of network attached , accessible java?

for instance, mac address returned change when active nic changes (user switches between wired , wireless), hence mac address not meet criterion.

a hostname closest meeting these criterion:

inetaddress localhost = inetaddress.getlocalhost();  hostname = localhost.gethostname();

though in virtual machine environments vm guest cycled nightly, hostname can change (we have such users).


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