ej.net.util

Class NetUtil

java.lang.Object

ej.net.util.NetUtil

public class NetUtil
extends java.lang.Object

Utilitary functions about net.

Method Summary

Modifier and Type	Method and Description
static java.net.InetAddress	getFirstHostAddress() Gets the the first host address of a valid (connected and not loopback) interface.
static java.net.InetAddress	getFirstHostAddress(java.net.NetworkInterface iface) Gets the first host address of a valid (connected and not loopback) interface.
static java.net.NetworkInterface	getInterface(java.lang.String interfaceName) Checks if a specific network interface is found.
static boolean	isConnected(java.net.InetAddress address) Checks whether an InetAddress is connected to a network.
static boolean	isValidInetAdress(java.net.InetAddress addr) Checks whether an IP is not loopback nor zero.

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getInterface

public static java.net.NetworkInterface getInterface(java.lang.String interfaceName)
                                              throws java.io.IOException

Checks if a specific network interface is found.

Parameters:

interfaceName - the interface name.

Returns:

the NetworkInterface, null if not found.

Throws:

java.io.IOException - if an IOException occurs.

getFirstHostAddress

public static java.net.InetAddress getFirstHostAddress()

Gets the the first host address of a valid (connected and not loopback) interface. This function does not ensure to provide the same InetAddress for two consecutive call if two interfaces are valid.

Returns:

the host address, null if none found.

See Also:

getFirstHostAddress(NetworkInterface)

getFirstHostAddress

public static java.net.InetAddress getFirstHostAddress(java.net.NetworkInterface iface)

Gets the first host address of a valid (connected and not loopback) interface.

Parameters:

iface - the interface to gets the host address from, can be null.

Returns:

the host address, null if none found.

isValidInetAdress

public static boolean isValidInetAdress(java.net.InetAddress addr)

Checks whether an IP is not loopback nor zero.

Parameters:

addr - the InetAddress address to check, can be null.

Returns:

true if the IP is valid.

isConnected

public static boolean isConnected(java.net.InetAddress address)

Checks whether an InetAddress is connected to a network.

Parameters:

address - the address to check, can be null.

Returns:

true if the address has been initialized.