java - InetAddress.getLocalHost().getHostAddress() is returning 127.0.1.1 -

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this question has answer here:

my question similar this question . want real ip of machine (not 127.0.0.1) strange, below code in ubuntu returning 127.0.1.1

inetaddress.getlocalhost().gethostaddress()

below complete code, posted in @ here

public string getmachineip() {     try {         string hostip = inetaddress.getlocalhost().gethostaddress();         if (!hostip.equals("127.0.0.1")) {             return hostip;         }          /*          * above method returns "127.0.0.1", in case need          * check available network interfaces          */         enumeration<networkinterface> ninterfaces = networkinterface                 .getnetworkinterfaces();         while (ninterfaces.hasmoreelements()) {             enumeration<inetaddress> inetaddresses = ninterfaces                     .nextelement().getinetaddresses();             while (inetaddresses.hasmoreelements()) {                 string address = inetaddresses.nextelement()                         .gethostaddress();                 if (!address.equals("127.0.0.1")) {                     return address;                 }             }         }     } catch (unknownhostexception e1) {         system.err.println("error = " + e1.getmessage());     } catch (socketexception e1) {         system.err.println("error = " + e1.getmessage());     }     return null; }

the above code returning 127.0.1.1 whereas ifconfig on ubuntu machine giving below output

root@dell:~# ifconfig eth0      link encap:ethernet  hwaddr 00:21:70:b7:30:cd             broadcast multicast  mtu:1500  metric:1           rx packets:0 errors:0 dropped:0 overruns:0 frame:0           tx packets:0 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:1000            rx bytes:0 (0.0 b)  tx bytes:0 (0.0 b)           interrupt:28 base address:0x6000   eth1      link encap:ethernet  hwaddr 00:22:68:d3:02:b5             inet addr:192.168.2.112  bcast:192.168.2.255  mask:255.255.255.0           inet6 addr: fe80::222:68ff:fed3:2b5/64 scope:link           broadcast running multicast  mtu:1500  metric:1           rx packets:23827 errors:0 dropped:0 overruns:0 frame:32515           tx packets:23200 errors:46 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:1000            rx bytes:22027719 (22.0 mb)  tx bytes:3778268 (3.7 mb)           interrupt:19   lo        link encap:local loopback             inet addr:127.0.0.1  mask:255.0.0.0           inet6 addr: ::1/128 scope:host           loopback running  mtu:16436  metric:1           rx packets:402 errors:0 dropped:0 overruns:0 frame:0           tx packets:402 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:0            rx bytes:29197 (29.1 kb)  tx bytes:29197 (29.1 kb)

i found 127.0.1.1 entry in host file (strange me, since never updated file)

root@dell:~# cat /etc/hosts 127.0.0.1   localhost 127.0.1.1   dell  # following lines desirable ipv6 capable hosts ::1     localhost ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters ff02::3 ip6-allhosts

how real ip of machine (not 127.0.0.1)? looking ipv4 address excluding 127.0.0.0/8 subnet

you'll need use networkinterface enumerate network interfaces; inetaddress.getlocalhost() returns loopback. doesn't explain why 127.0.1.1 instead of 127.0.0.1, since method doesn't you're trying do, doesn't seem pertinent. see: http://docs.oracle.com/javase/6/docs/api/java/net/networkinterface.html#getinetaddresses()


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