Got java.net.UnknownHostException, can't ping any website, but can browse normally

I'm trying to write a program to send XML request via HTTP to a vendor server, and I used the example code from [this link][1]. Then I got the error `java.net.UnknownHostException` when running the code Then I tried to ping the vendor host, and then `www.google.com`. None of them works. I got: > "ping request could not find host www.google.com" I'm using corporate network. I can browse, and download and communicate to the vendor server with their web application normally. Any idea how to fix this? [1]: http://www.xyzws.com/Javafaq/how-to-use-httpurlconnection-post-data-to-web-server/139
Your coroporate network probably has no DNS for external domains, and the resolution is done via a proxy. So, no DNS for you! And you need to go through a proxy to do your HTTP stuff.

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