Example usage for java.net NetworkInterface getNetworkInterfaces

List of usage examples for java.net NetworkInterface getNetworkInterfaces

  1. HOME
  2. Java
  3. java
  4. java.net.*
  5. NetworkInterface
  6. getNetworkInterfaces

Introduction

In this page you can find the example usage for java.net NetworkInterface getNetworkInterfaces.

Prototype

public static Enumeration<NetworkInterface> getNetworkInterfaces() throws SocketException

Source Link

Document

Returns an Enumeration of all the interfaces on this machine.

Usage

From source file:Main.java

public static String getIpAddress() {
    String ipaddress = "";

    try {//w w  w .  j a va 2  s.c o m
        for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en
                .hasMoreElements();) {
            NetworkInterface intf = en.nextElement();
            for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
                InetAddress inetAddress = enumIpAddr.nextElement();
                if (!inetAddress.isLoopbackAddress()) {
                    ipaddress = ipaddress + ";" + inetAddress.getHostAddress().toString();
                }
            }
        }
    } catch (SocketException ex) {
        ipaddress = null;
        Log.e("WifiPreference IpAddress", ex.toString());
    }
    return ipaddress;
}

From source file:Main.java

public static String GetWantedIPAdress_JAVA() {
    String wantedIP = "";
    Enumeration<NetworkInterface> e = null;

    try {/*  w  w w.  j a v a2  s.c o  m*/
        e = NetworkInterface.getNetworkInterfaces();
    } catch (SocketException e1) {
        e1.printStackTrace();
    }

    if (e != null) {
        while (e.hasMoreElements()) {
            NetworkInterface n = (NetworkInterface) e.nextElement();
            Enumeration<InetAddress> ee = n.getInetAddresses();
            while (ee.hasMoreElements()) {
                InetAddress i = (InetAddress) ee.nextElement();
                if (i.getHostAddress().toString().contains("192.168.")
                        || i.getHostAddress().toString().startsWith("10.")) {
                    wantedIP = i.getHostAddress();
                    break;
                }
            }
        }
    }

    return wantedIP;
}

From source file:Main.java

public static NetworkInterface getActiveNetworkInterface(Context c) {
    try {/*from w ww .j a  v a  2  s .  c  o m*/
        for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en
                .hasMoreElements();) {
            NetworkInterface intf = en.nextElement();

            for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
                InetAddress inetAddress = enumIpAddr.nextElement();
                if (inetAddress.isLoopbackAddress())
                    break; // break inner loop, continue with outer loop

                return intf; // this is not the loopback and it has an IP address assigned
            }
        }
    } catch (SocketException e) {
        e.printStackTrace();
    }
    // nothing found
    return null;
}

From source file:Main.java

public static NetworkInterface getActiveNetworkInterface() {

    Enumeration<NetworkInterface> interfaces = null;
    try {//w w  w  . j a  v  a  2s .  c  o  m
        interfaces = NetworkInterface.getNetworkInterfaces();
    } catch (SocketException e) {
        return null;
    }

    while (interfaces.hasMoreElements()) {
        NetworkInterface iface = interfaces.nextElement();
        Enumeration<InetAddress> inetAddresses = iface.getInetAddresses();

        /* Check if we have a non-local address. If so, this is the active
         * interface.
         *
         * This isn't a perfect heuristic: I have devices which this will
         * still detect the wrong interface on, but it will handle the
         * common cases of wifi-only and Ethernet-only.
         */
        if (iface.getName().startsWith("w")) {
            //this is a perfect hack for getting wifi alone

            while (inetAddresses.hasMoreElements()) {
                InetAddress addr = inetAddresses.nextElement();

                if (!(addr.isLoopbackAddress() || addr.isLinkLocalAddress())) {
                    Log.d("LSSDP", "DisplayName" + iface.getDisplayName() + " Name " + iface.getName());

                    return iface;
                }
            }
        }
    }

    return null;
}

From source file:Main.java

public static String getWifiIpv6() {
    try {//from ww w.ja v a 2  s.  co  m
        for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en
                .hasMoreElements();) {
            NetworkInterface intf = en.nextElement();
            for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
                InetAddress inetAddress = enumIpAddr.nextElement();
                if (!inetAddress.isLoopbackAddress() && inetAddress instanceof Inet6Address) {
                    String[] ipv6 = inetAddress.getHostAddress().split("%");
                    String port = ipv6[1];
                    if (port.matches("wlan\\d+")) {
                        return ipv6[0];
                    }
                }
            }
        }
    } catch (SocketException ex) { /*CONSUME*/
    }
    return null;
}

From source file:Main.java

@SuppressLint("DefaultLocale")
public static String getLocalHostAddress() {
    boolean useIPv4 = true;

    try {//w ww.ja v  a2  s .c  o m
        List<NetworkInterface> interfaces = Collections.list(NetworkInterface.getNetworkInterfaces());
        for (NetworkInterface intf : interfaces) {
            List<InetAddress> addrs = Collections.list(intf.getInetAddresses());
            for (InetAddress addr : addrs) {
                if (!addr.isLoopbackAddress()) {
                    String sAddr = addr.getHostAddress().toUpperCase();
                    boolean isIPv4 = InetAddressUtils.isIPv4Address(sAddr);
                    if (useIPv4) {
                        if (isIPv4) {
                            return sAddr;
                        }
                    } else {
                        if (!isIPv4) {
                            int delim = sAddr.indexOf('%'); // drop ip6 port suffix
                            return delim < 0 ? sAddr : sAddr.substring(0, delim);
                        }
                    }
                }
            }
        }
    } catch (Exception ex) {
    } // for now eat exceptions
    return "";
}

From source file:Main.java

public static String getLocalIpAddress(Context context) {
    try {/*from   ww w .  j a va  2  s  . c  o m*/
        String ipv4;

        List<NetworkInterface> nilist = Collections.list(NetworkInterface.getNetworkInterfaces());
        for (NetworkInterface ni : nilist) {
            if (ni.getName().toLowerCase().contains("usbnet"))
                continue;
            List<InetAddress> ialist = Collections.list(ni.getInetAddresses());
            for (InetAddress address : ialist) {
                if (!address.isLoopbackAddress()
                        && InetAddressUtils.isIPv4Address(ipv4 = address.getHostAddress())) {
                    return ipv4;
                }
            }

        }

    } catch (SocketException ex) {
        Log.d("socket_err", ex.toString());
    }
    return null;
}

From source file:Main.java

/**
 * Returns MAC address of the given interface name.
 *
 * @param interfaceName eth0, wlan0 or NULL=use first interface
 * @return mac address or empty string/*from   w  w w  .  j  a  va  2 s  .  co m*/
 */
public static String getMACAddress(String interfaceName) {
    try {
        List<NetworkInterface> interfaces = Collections.list(NetworkInterface.getNetworkInterfaces());
        for (NetworkInterface intf : interfaces) {
            if (interfaceName != null) {
                if (!intf.getName().equalsIgnoreCase(interfaceName))
                    continue;
            }
            byte[] mac = intf.getHardwareAddress();
            if (mac == null)
                return "";
            StringBuilder buf = new StringBuilder();
            for (int idx = 0; idx < mac.length; idx++)
                buf.append(String.format("%02X:", mac[idx]));
            if (buf.length() > 0)
                buf.deleteCharAt(buf.length() - 1);
            return buf.toString();
        }
    } catch (Exception ex) {
    } // for now eat exceptions
    return "";
    /*try {
    // this is so Linux hack
    return loadFileAsString("/sys/class/net/" +interfaceName + "/address").toUpperCase().trim();
    } catch (IOException ex) {
    return null;
    }*/
}

From source file:Main.java

/**
 * Get IP address from first non-localhost interface
 *
 * @param useIPv4 true=return ipv4, false=return ipv6
 * @return address or empty string/*  w w w  .j  a  v  a 2 s  . c o  m*/
 */
public static String getIPAddress(boolean useIPv4) {
    try {
        List<NetworkInterface> interfaces = Collections.list(NetworkInterface.getNetworkInterfaces());
        for (NetworkInterface intf : interfaces) {
            List<InetAddress> addrs = Collections.list(intf.getInetAddresses());
            for (InetAddress addr : addrs) {
                if (!addr.isLoopbackAddress()) {
                    String sAddr = addr.getHostAddress();
                    //boolean isIPv4 = InetAddressUtils.isIPv4Address(sAddr);
                    boolean isIPv4 = sAddr.indexOf(':') < 0;

                    if (useIPv4) {
                        if (isIPv4)
                            return sAddr;
                    } else {
                        if (!isIPv4) {
                            int delim = sAddr.indexOf('%'); // drop ip6 zone suffix
                            return delim < 0 ? sAddr.toUpperCase() : sAddr.substring(0, delim).toUpperCase();
                        }
                    }
                }
            }
        }
    } catch (Exception ex) {
    } // for now eat exceptions
    return "";
}

From source file:Main.java

/**
 * Get the local IP address./*w ww  .j a v  a 2 s. c o m*/
 * 
 * @return string containing the current local IP address
 */
public static String getLocalIpAddress() {
    try {
        for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en
                .hasMoreElements();) {
            NetworkInterface intf = en.nextElement();
            for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
                InetAddress inetAddress = enumIpAddr.nextElement();
                if (!inetAddress.isLoopbackAddress()) {
                    return inetAddress.getHostAddress().toString();
                }
            }
        }
    } catch (SocketException ex) {
        android.util.Log.e(TAG, ex.toString());
    }
    return null;
}