sockets - How to get computer's WAN IP address in Java? -

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how wide area network of computer java? try this:

serversocket ss = new serversocket(port); system.out.println(ss.getinetaddress().gethostaddress()); //wich return 0.0.0.0

then try this:

system.out.println(inetaddress.getlocalhost().tostring()); //which return keenan-a658368c/192.168.1.100 < yes connected router

like function said, return local ip address

how wan ip address? such 118.137.43.219

you can http://whatismyip.com/automation/n09230945.asp. can open httpurlconnection site , parse output.

this program should helpful :

import java.net.httpurlconnection;  public class getexternalip {      public static void main(string args[]) {         try {              java.net.url url = new java.net.url(                     "http://whatismyip.com/automation/n09230945.asp");              java.net.httpurlconnection con = (httpurlconnection) url                     .openconnection();              java.io.inputstream stream = con.getinputstream();              java.io.inputstreamreader reader = new java.io.inputstreamreader(                     stream);              java.io.bufferedreader breader = new java.io.bufferedreader(reader);              system.out.print("your ip address " + breader.readline());          } catch (exception e) {             e.printstacktrace();         }      }  }

referenced :

http://www.daniweb.com/forums/thread192872.html

http://www.coderanch.com/t/411356/java/java/public-ip-address-time-limit


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