Example usage for java.net UnknownHostException printStackTrace

Introduction

In this page you can find the example usage for java.net UnknownHostException printStackTrace.

Prototype

public void printStackTrace()

Source Link

Document

Prints this throwable and its backtrace to the standard error stream.

Usage

From source file:Main.java

public static String getBroadcastAddress(Context context) {
    WifiManager wifi = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
    DhcpInfo dhcp = wifi.getDhcpInfo();/*ww w  .  ja  v  a2s . co m*/

    int broadcast = (dhcp.ipAddress & dhcp.netmask) | ~dhcp.netmask;
    byte[] quads = new byte[4];
    for (int k = 0; k < 4; k++)
        quads[k] = (byte) (broadcast >> (k * 8));
    try {
        return InetAddress.getByAddress(quads).getHostAddress();
    } catch (UnknownHostException e) {
        e.printStackTrace();
    }

    return "255.255.255.255";
}

From source file:Main.java

/**
 * parse InetAddress/*from  www . ja  v  a  2s  .c o  m*/
 * 
 * @param inetAddrBytes
 * @return
 */
public static InetAddress parseInetAddr(byte[] inetAddrBytes, int offset, int count) {
    InetAddress inetAddress = null;
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < count; i++) {
        sb.append(Integer.toString(inetAddrBytes[offset + i] & 0xff));
        if (i != count - 1) {
            sb.append('.');
        }
    }
    try {
        inetAddress = InetAddress.getByName(sb.toString());
    } catch (UnknownHostException e) {
        e.printStackTrace();
    }
    return inetAddress;
}

From source file:Main.java

/**
 * get the local ip address by Android System
 * //from ww w  .ja  v a  2 s .  c om
 * @param context
 *            the context
 * @return the local ip addr allocated by Ap
 */
public static InetAddress getLocalInetAddress(Context context) {
    WifiManager wm = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
    WifiInfo wifiInfo = wm.getConnectionInfo();
    int localAddrInt = wifiInfo.getIpAddress();
    String localAddrStr = __formatString(localAddrInt);
    InetAddress localInetAddr = null;
    try {
        localInetAddr = InetAddress.getByName(localAddrStr);
    } catch (UnknownHostException e) {
        e.printStackTrace();
    }
    return localInetAddr;
}

From source file:Main.java

/**
 * Calculates the network mask address from the value
 * //from ww  w .  java2 s .c  o  m
 * @param numericMask
 *            the network mask
 * @return
 */
public static String networkMaskFromInt(int numericMask) {
    //        StringBuffer sb = new StringBuffer(15);
    //        for (int shift = 24; shift > 0; shift -= 8) {
    //            // process 3 bytes, from high order byte down.
    //            sb.append(Integer.toString((numericMask >>> shift) & 0xff));
    //            sb.append('.');
    //        }
    //        sb.append(Integer.toString(numericMask & 0xff));
    //        return sb.toString();
    //    }
    //    
    //    public String getMaskAsString() {
    int value = 0xffffffff << (32 - numericMask);
    byte[] bytes = new byte[] { (byte) (value >>> 24), (byte) (value >> 16 & 0xff), (byte) (value >> 8 & 0xff),
            (byte) (value & 0xff) };

    InetAddress netAddr = null;
    try {
        netAddr = InetAddress.getByAddress(bytes);
    } catch (UnknownHostException e) {
        e.printStackTrace();
    }
    return netAddr.getHostAddress();
}

From source file:Main.java

public static String getDomainAddress(final String domain) {
    try {/*from w w  w .  ja v  a 2 s.co m*/
        ExecutorService exec = Executors.newCachedThreadPool();
        Future<String> fs = exec.submit(new Callable<String>() {
            @Override
            public String call() throws Exception {
                InetAddress inetAddress;
                try {
                    inetAddress = InetAddress.getByName(domain);
                    return inetAddress.getHostAddress();
                } catch (UnknownHostException e) {
                    e.printStackTrace();
                }
                return null;
            }
        });
        return fs.get();
    } catch (InterruptedException | ExecutionException e) {
        e.printStackTrace();
    }
    return null;
}

From source file:org.apache.eagle.topology.utils.EntityBuilderHelper.java

public static String resolveHostByIp(String ip) {
    InetAddress addr = null;/* w w  w . j a v a 2  s.com*/
    try {
        addr = InetAddress.getByName(ip);
    } catch (UnknownHostException e) {
        e.printStackTrace();
    }
    return addr.getHostName();
}

From source file:org.csstudio.domain.common.net.GatewayUtil.java

public static boolean hasGateway() {
    boolean inSubnet = false;
    try {//from  w w w.  j av a2s  .  co  m
        final InetAddress localHost = InetAddress.getLocalHost();
        final String myAddress = localHost.getHostAddress();
        final List<SubnetUtils> controlSubnets = getControlSubnets();
        for (final SubnetUtils subnetUtils : controlSubnets) {
            inSubnet |= subnetUtils.getInfo().isInRange(myAddress);
        }
    } catch (final UnknownHostException e) {
        e.printStackTrace();
    } finally {
    }
    return !inSubnet;
}

From source file:Main.java

public static InetAddress ipIntToInet4Address(int ip) {
    byte[] ipAddress = new byte[4];
    writeInt(ipAddress, 0, ip);//from w ww.  ja  v  a 2 s  .com
    try {
        return Inet4Address.getByAddress(ipAddress);
    } catch (UnknownHostException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        return null;
    }
}

From source file:Main.java

public static String getHostName(String ip) {
    String hostName = "Unknown";

    try {/*from w  w  w .  java2  s  .  co m*/
        InetAddress add = InetAddress.getByName(ip);
        hostName = add.getHostName();

        Log.d(Tag, "host name is " + hostName);
    } catch (UnknownHostException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return hostName;
}

From source file:Main.java

/**
 * Performs execution of the shell command on remote host.
 * @param host ip address or name of the host.
 * @param port telnet port/*from w  w w  . j  a va 2  s . c  o m*/
 * @param command shell command to be executed.
 * @return true if success, false on error.
 */
public static final boolean executeRemotely(String host, int port, String command) {
    Socket socket = null;
    OutputStream os = null;

    try {
        socket = new Socket(host, port);

        os = socket.getOutputStream();

        os.write(command.getBytes());
        os.flush();

        return true;
    } catch (UnknownHostException e) {
        e.printStackTrace();
        return false;
    } catch (IOException e) {
        e.printStackTrace();
        return false;
    } finally {

        if (os != null) {
            try {
                os.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        if (socket != null && !socket.isClosed()) {
            try {
                socket.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}