java.net

Class Inet4Address

java.lang.Object

java.net.InetAddress

java.net.Inet4Address

All Implemented Interfaces:

Serializable

public final class Inet4Address
extends InetAddress

An IPv4 address. See InetAddress.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static InetAddress	ALL
static InetAddress	ANY
static InetAddress	LOOPBACK

Fields inherited from class java.net.InetAddress

UNSPECIFIED

Method Summary

Modifier and Type	Method and Description
boolean	isAnyLocalAddress() Returns whether this is the IPv6 unspecified wildcard address :: or the IPv4 "any" address, 0.0.0.0.
boolean	isLinkLocalAddress() Returns whether this address is a link-local address or not.
boolean	isLoopbackAddress() Returns whether this address is a loopback address or not.
boolean	isMCGlobal() Returns whether this address is a global multicast address or not.
boolean	isMCLinkLocal() Returns whether this address is a link-local multicast address or not.
boolean	isMCNodeLocal() Returns whether this address is a node-local multicast address or not.
boolean	isMCOrgLocal() Returns whether this address is a organization-local multicast address or not.
boolean	isMCSiteLocal() Returns whether this address is a site-local multicast address or not.
boolean	isMulticastAddress() Returns whether this address is a multicast address or not.
boolean	isSiteLocalAddress() Returns whether this address is a site-local address or not.

Methods inherited from class java.net.InetAddress

clearDnsCache, equals, getAddress, getAllByName, getAllByNameOnNet, getByAddress, getByAddress, getByName, getByNameOnNet, getCanonicalHostName, getHostAddress, getHostName, getHostString, getLocalHost, getLoopbackAddress, hashCode, isNumeric, isReachable, isReachable, parseNumericAddress, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

ANY

public static final InetAddress ANY

ALL

public static final InetAddress ALL

LOOPBACK

public static final InetAddress LOOPBACK

Method Detail

isAnyLocalAddress

public boolean isAnyLocalAddress()

Description copied from class: InetAddress

Returns whether this is the IPv6 unspecified wildcard address :: or the IPv4 "any" address, 0.0.0.0.

Overrides:

isAnyLocalAddress in class InetAddress

isLinkLocalAddress

public boolean isLinkLocalAddress()

Description copied from class: InetAddress

Returns whether this address is a link-local address or not.

Valid IPv6 link-local addresses have the prefix fe80::/10.

RFC 3484 "Default Address Selection for Internet Protocol Version 6 (IPv6)" states that both IPv4 auto-configuration addresses (prefix 169.254/16) and IPv4 loopback addresses (prefix 127/8) have link-local scope, but Inet4Address only considers the auto-configuration addresses to have link-local scope. That is: the IPv4 loopback address returns false.

Overrides:

isLinkLocalAddress in class InetAddress

isLoopbackAddress

public boolean isLoopbackAddress()

Description copied from class: InetAddress

Returns whether this address is a loopback address or not.

Valid IPv4 loopback addresses have the prefix 127/8.

The only valid IPv6 loopback address is ::1.

Overrides:

isLoopbackAddress in class InetAddress

isMCGlobal

public boolean isMCGlobal()

Description copied from class: InetAddress

Returns whether this address is a global multicast address or not.

Valid IPv6 global multicast addresses have the prefix ffxe::/16, where x is a set of flags and the additional 112 bits make up the global multicast address space.

Valid IPv4 global multicast addresses are the range of addresses from 224.0.1.0 to 238.255.255.255.

Overrides:

isMCGlobal in class InetAddress

isMCLinkLocal

public boolean isMCLinkLocal()

Description copied from class: InetAddress

Returns whether this address is a link-local multicast address or not.

Valid IPv6 link-local multicast addresses have the prefix ffx2::/16, where x is a set of flags and the additional 112 bits make up the link-local multicast address space.

Valid IPv4 link-local multicast addresses have the prefix 224.0.0/24.

Overrides:

isMCLinkLocal in class InetAddress

isMCNodeLocal

public boolean isMCNodeLocal()

Description copied from class: InetAddress

Returns whether this address is a node-local multicast address or not.

Valid IPv6 node-local multicast addresses have the prefix ffx1::/16, where x is a set of flags and the additional 112 bits make up the link-local multicast address space.

There are no valid IPv4 node-local multicast addresses.

Overrides:

isMCNodeLocal in class InetAddress

isMCOrgLocal

public boolean isMCOrgLocal()

Description copied from class: InetAddress

Returns whether this address is a organization-local multicast address or not.

Valid IPv6 organization-local multicast addresses have the prefix ffx8::/16, where x is a set of flags and the additional 112 bits make up the link-local multicast address space.

Valid IPv4 organization-local multicast addresses have the prefix 239.192/14.

Overrides:

isMCOrgLocal in class InetAddress

isMCSiteLocal

public boolean isMCSiteLocal()

Description copied from class: InetAddress

Returns whether this address is a site-local multicast address or not.

Valid IPv6 site-local multicast addresses have the prefix ffx5::/16, where x is a set of flags and the additional 112 bits make up the link-local multicast address space.

Valid IPv4 site-local multicast addresses have the prefix 239.255/16.

Overrides:

isMCSiteLocal in class InetAddress

isMulticastAddress

public boolean isMulticastAddress()

Description copied from class: InetAddress

Returns whether this address is a multicast address or not.

Valid IPv6 multicast addresses have the prefix ff::/8.

Valid IPv4 multicast addresses have the prefix 224/4.

Overrides:

isMulticastAddress in class InetAddress

isSiteLocalAddress

public boolean isSiteLocalAddress()

Description copied from class: InetAddress

Returns whether this address is a site-local address or not.

For the purposes of this method, valid IPv6 site-local addresses have the deprecated prefix fec0::/10 from RFC 1884, not the modern prefix fc00::/7 from RFC 4193.

RFC 3484 "Default Address Selection for Internet Protocol Version 6 (IPv6)" states that IPv4 private addresses have the prefix 10/8, 172.16/12, or 192.168/16.

Overrides:

isSiteLocalAddress in class InetAddress

Returns:

true if this instance represents a site-local address, false otherwise.