Why is there a warning that i am not connected to the internet while i'm advised that a need a java-runtime

hi,
on two occasions, when trying to start an application, i received a warning saying i need a java runtime (?) but that i was not connected to the internet while in fact I was. I controlled this by selecting the system network preference which confirmed my internetconnection was working properly?
thanks in advance
ps: sorry for my language as i am not a native speaker
patrick

Because the machine is not able to resolve the name of the server where it needs to get the Java runtime from. Seem to be a lot of wonky DNS out there.
Temporarily switch your DNS to 8.8.8.8 and 4.4.4.4, open a terminal, and type 'java -version', to get it to install the runtime.
Then put your DNS back the way it was.

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Why is there a warning that i am not connected to the internet while i'm advised that a need a java-runtime

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