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Added in API level 1

Summary: Methods | Inherited Methods | [Expand All]

Inet4Address

public final class Inet4Address
extends InetAddress

java.lang.Object
↳	java.net.InetAddress
	↳	java.net.Inet4Address

This class represents an Internet Protocol version 4 (IPv4) address. Defined by RFC 790: Assigned Numbers, RFC 1918: Address Allocation for Private Internets, and RFC 2365: Administratively Scoped IP Multicast

Textual representation of IP addresses

Textual representation of IPv4 address used as input to methods takes one of the following forms:

d.d.d.d

d.d.d

d.d

d

When four parts are specified, each is interpreted as a byte of data and assigned, from left to right, to the four bytes of an IPv4 address.

When a three part address is specified, the last part is interpreted as a 16-bit quantity and placed in the right most two bytes of the network address. This makes the three part address format convenient for specifying Class B net- work addresses as 128.net.host.

When a two part address is supplied, the last part is interpreted as a 24-bit quantity and placed in the right most three bytes of the network address. This makes the two part address format convenient for specifying Class A network addresses as net.host.

When only one part is given, the value is stored directly in the network address without any byte rearrangement.

For methods that return a textual representation as output value, the first form, i.e. a dotted-quad string, is used.

The Scope of a Multicast Address

Historically the IPv4 TTL field in the IP header has doubled as a multicast scope field: a TTL of 0 means node-local, 1 means link-local, up through 32 means site-local, up through 64 means region-local, up through 128 means continent-local, and up through 255 are global. However, the administrative scoping is preferred. Please refer to RFC 2365: Administratively Scoped IP Multicast

Summary

Public methods
`boolean`	`equals(Object obj)` Compares this object against the specified object.
`byte[]`	`getAddress()` Returns the raw IP address of this `InetAddress` object.
`String`	`getHostAddress()` Returns the IP address string in textual presentation form.
`int`	`hashCode()` Returns a hashcode for this IP address.
`boolean`	`isAnyLocalAddress()` Utility routine to check if the InetAddress in a wildcard address.
`boolean`	`isLinkLocalAddress()` Utility routine to check if the InetAddress is an link local address.
`boolean`	`isLoopbackAddress()` Utility routine to check if the InetAddress is a loopback address.
`boolean`	`isMCGlobal()` Utility routine to check if the multicast address has global scope.
`boolean`	`isMCLinkLocal()` Utility routine to check if the multicast address has link scope.
`boolean`	`isMCNodeLocal()` Utility routine to check if the multicast address has node scope.
`boolean`	`isMCOrgLocal()` Utility routine to check if the multicast address has organization scope.
`boolean`	`isMCSiteLocal()` Utility routine to check if the multicast address has site scope.
`boolean`	`isMulticastAddress()` Utility routine to check if the InetAddress is an IP multicast address.
`boolean`	`isSiteLocalAddress()` Utility routine to check if the InetAddress is a site local address.

Inherited methods

From class


  
    java.net.InetAddress

`boolean`	`equals(Object obj)` Compares this object against the specified object.
`byte[]`	`getAddress()` Returns the raw IP address of this `InetAddress` object.
`static InetAddress[]`	`getAllByName(String host)` Given the name of a host, returns an array of its IP addresses, based on the configured name service on the system.
`static InetAddress`	`getByAddress(byte[] addr)` Returns an `InetAddress` object given the raw IP address .
`static InetAddress`	`getByAddress(String host, byte[] addr)` Creates an InetAddress based on the provided host name and IP address.
`static InetAddress`	`getByName(String host)` Determines the IP address of a host, given the host's name.
`String`	`getCanonicalHostName()` Gets the fully qualified domain name for this IP address.
`String`	`getHostAddress()` Returns the IP address string in textual presentation.
`String`	`getHostName()` Gets the host name for this IP address.
`static InetAddress`	`getLocalHost()` Returns the address of the local host.
`static InetAddress`	`getLoopbackAddress()` Returns the loopback address.
`int`	`hashCode()` Returns a hashcode for this IP address.
`boolean`	`isAnyLocalAddress()` Utility routine to check if the InetAddress in a wildcard address.
`boolean`	`isLinkLocalAddress()` Utility routine to check if the InetAddress is an link local address.
`boolean`	`isLoopbackAddress()` Utility routine to check if the InetAddress is a loopback address.
`boolean`	`isMCGlobal()` Utility routine to check if the multicast address has global scope.
`boolean`	`isMCLinkLocal()` Utility routine to check if the multicast address has link scope.
`boolean`	`isMCNodeLocal()` Utility routine to check if the multicast address has node scope.
`boolean`	`isMCOrgLocal()` Utility routine to check if the multicast address has organization scope.
`boolean`	`isMCSiteLocal()` Utility routine to check if the multicast address has site scope.
`boolean`	`isMulticastAddress()` Utility routine to check if the InetAddress is an IP multicast address.
`boolean`	`isReachable(int timeout)` Test whether that address is reachable.
`boolean`	`isReachable(NetworkInterface netif, int ttl, int timeout)` Test whether that address is reachable.
`boolean`	`isSiteLocalAddress()` Utility routine to check if the InetAddress is a site local address.
`String`	`toString()` Converts this IP address to a `String`.

From class


  
    java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long millis, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long millis)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

Public methods

equals

Added in API level 1

boolean equals (Object obj)

Compares this object against the specified object. The result is true if and only if the argument is not null and it represents the same IP address as this object.

Two instances of InetAddress represent the same IP address if the length of the byte arrays returned by getAddress is the same for both, and each of the array components is the same for the byte arrays.

Parameters
`obj`	`Object`: the object to compare against.

Returns
`boolean`	`true` if the objects are the same; `false` otherwise.

See also:

getAddress()

getAddress

Added in API level 1

byte[] getAddress ()

Returns the raw IP address of this InetAddress object. The result is in network byte order: the highest order byte of the address is in getAddress()[0].

Returns
`byte[]`	the raw IP address of this object.

getHostAddress

Added in API level 1

String getHostAddress ()

Returns the IP address string in textual presentation form.

Returns
`String`	the raw IP address in a string format.

hashCode

Added in API level 1

int hashCode ()

Returns a hashcode for this IP address.

Returns
`int`	a hash code value for this IP address.

isAnyLocalAddress

Added in API level 1

boolean isAnyLocalAddress ()

Utility routine to check if the InetAddress in a wildcard address.

Returns
`boolean`	a `boolean` indicating if the Inetaddress is a wildcard address.

isLinkLocalAddress

Added in API level 1

boolean isLinkLocalAddress ()

Utility routine to check if the InetAddress is an link local address.

Returns
`boolean`	a `boolean` indicating if the InetAddress is a link local address; or false if address is not a link local unicast address.

isLoopbackAddress

Added in API level 1

boolean isLoopbackAddress ()

Utility routine to check if the InetAddress is a loopback address.

Returns
`boolean`	a `boolean` indicating if the InetAddress is a loopback address; or false otherwise.

isMCGlobal

Added in API level 1

boolean isMCGlobal ()

Utility routine to check if the multicast address has global scope.

Returns
`boolean`	a `boolean` indicating if the address has is a multicast address of global scope, false if it is not of global scope or it is not a multicast address

isMCLinkLocal

Added in API level 1

boolean isMCLinkLocal ()

Utility routine to check if the multicast address has link scope.

Returns
`boolean`	a `boolean` indicating if the address has is a multicast address of link-local scope, false if it is not of link-local scope or it is not a multicast address

isMCNodeLocal

Added in API level 1

boolean isMCNodeLocal ()

Utility routine to check if the multicast address has node scope.

Returns
`boolean`	a `boolean` indicating if the address has is a multicast address of node-local scope, false if it is not of node-local scope or it is not a multicast address

isMCOrgLocal

Added in API level 1

boolean isMCOrgLocal ()

Utility routine to check if the multicast address has organization scope.

Returns
`boolean`	a `boolean` indicating if the address has is a multicast address of organization-local scope, false if it is not of organization-local scope or it is not a multicast address

isMCSiteLocal

Added in API level 1

boolean isMCSiteLocal ()

Utility routine to check if the multicast address has site scope.

Returns
`boolean`	a `boolean` indicating if the address has is a multicast address of site-local scope, false if it is not of site-local scope or it is not a multicast address

isMulticastAddress

Added in API level 1

boolean isMulticastAddress ()

Utility routine to check if the InetAddress is an IP multicast address. IP multicast address is a Class D address i.e first four bits of the address are 1110.

Returns
`boolean`	a `boolean` indicating if the InetAddress is an IP multicast address

isSiteLocalAddress

Added in API level 1

boolean isSiteLocalAddress ()

Utility routine to check if the InetAddress is a site local address.

Returns
`boolean`	a `boolean` indicating if the InetAddress is a site local address; or false if address is not a site local unicast address.

Interfaces

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Inet4Address

Textual representation of IP addresses

The Scope of a Multicast Address

Summary

Public methods

Inherited methods

Public methods

equals

getAddress

getHostAddress

hashCode

isAnyLocalAddress

isLinkLocalAddress

isLoopbackAddress

isMCGlobal

isMCLinkLocal

isMCNodeLocal

isMCOrgLocal

isMCSiteLocal

isMulticastAddress

isSiteLocalAddress