Inet4Address

public final class Inet4Address extends InetAddress

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

Public Method Summary

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