CODEWITHSUNDEEP
javainetaddressunknown-host
Mase
Mase

Reputation: 95

inetAddress.getByName(address) unknownhostexception

Does the getByName() function work on a link with a path like https://stackoverflow.com/questions, or does the link have to include the host only (https://stackoverflow.com)?

I get UnknownHostException when I use a link that contains a "/", any tips on how to resolve that?

The console says the error lies here:

socket = new Socket(InetAddress.getByName(adr), port);

Upvotes: 1

Views: 10101

Answers (1)

Criticize SE actions means ban
Criticize SE actions means ban

Reputation: 58848

InetAddress.getByName looks up a name (usually in DNS) and returns the corresponding address.

There's no host called "https://stackoverflow.com/questions" so that throws an UnknownHostException.
There's no host called "https://stackoverflow.com" either.
In this particular example, the host name is "stackoverflow.com".

If you want to parse a URL (such as "https://stackoverflow.com/questions") to get the hostname, you can use the java.net.URL class:

String hostname = new URL("https://stackoverflow.com/questions").getHost();
System.out.println(hostname); // stackoverflow.com

Upvotes: 11

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