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java.net.UnknownHostException: foo	at java.net.InetAddress.getAllByName0(InetAddress.java:571)	at java.net.InetAddress.getAllByName0(InetAddress.java:540)	at java.net.InetAddress.getByName(InetAddress.java:449)	at java.net.Socket.(Socket.java:100)	at sun.net.NetworkClient.doConnect(NetworkClient.java:50)	at sun.net.www.http.HttpClient.openServer(HttpClient.java:335)	at sun.net.www.http.HttpClient.openServer(HttpClient.java:521)	at sun.net.www.http.HttpClient.(HttpClient.java:271)	at sun.net.www.http.HttpClient.(HttpClient.java:281)	at sun.net.www.http.HttpClient.New(HttpClient.java:293)	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:404)	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:497)	at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:230)	at HttpTest.main(HttpTest.java:29)