- java.lang.Object
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- java.net.InetAddress
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- java.net.Inet4Address
 
 
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- All Implemented Interfaces:
- Serializable
 
 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 MulticastTextual representation of IP addressesTextual 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 AddressHistorically 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- Since:
- 1.4
- See Also:
- Serialized Form
 
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Method SummaryAll Methods Instance Methods Concrete Methods Modifier and Type Method Description booleanequals(Object obj)Compares this object against the specified object.byte[]getAddress()Returns the raw IP address of thisInetAddressobject.StringgetHostAddress()Returns the IP address string in textual presentation form.inthashCode()Returns a hashcode for this IP address.booleanisAnyLocalAddress()Utility routine to check if the InetAddress is a wildcard address.booleanisLinkLocalAddress()Utility routine to check if the InetAddress is an link local address.booleanisLoopbackAddress()Utility routine to check if the InetAddress is a loopback address.booleanisMCGlobal()Utility routine to check if the multicast address has global scope.booleanisMCLinkLocal()Utility routine to check if the multicast address has link scope.booleanisMCNodeLocal()Utility routine to check if the multicast address has node scope.booleanisMCOrgLocal()Utility routine to check if the multicast address has organization scope.booleanisMCSiteLocal()Utility routine to check if the multicast address has site scope.booleanisMulticastAddress()Utility routine to check if the InetAddress is an IP multicast address.booleanisSiteLocalAddress()Utility routine to check if the InetAddress is a site local address.- 
Methods declared in class java.net.InetAddressgetAllByName, getByAddress, getByAddress, getByName, getCanonicalHostName, getHostName, getLocalHost, getLoopbackAddress, isReachable, isReachable, toString
 
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Method Detail- 
isMulticastAddresspublic 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.- Overrides:
- isMulticastAddressin class- InetAddress
- Returns:
- a booleanindicating if the InetAddress is an IP multicast address
 
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isAnyLocalAddresspublic boolean isAnyLocalAddress() Utility routine to check if the InetAddress is a wildcard address.- Overrides:
- isAnyLocalAddressin class- InetAddress
- Returns:
- a booleanindicating if the Inetaddress is a wildcard address.
 
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isLoopbackAddresspublic boolean isLoopbackAddress() Utility routine to check if the InetAddress is a loopback address.- Overrides:
- isLoopbackAddressin class- InetAddress
- Returns:
- a booleanindicating if the InetAddress is a loopback address; or false otherwise.
 
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isLinkLocalAddresspublic boolean isLinkLocalAddress() Utility routine to check if the InetAddress is an link local address.- Overrides:
- isLinkLocalAddressin class- InetAddress
- Returns:
- a booleanindicating if the InetAddress is a link local address; or false if address is not a link local unicast address.
 
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isSiteLocalAddresspublic boolean isSiteLocalAddress() Utility routine to check if the InetAddress is a site local address.- Overrides:
- isSiteLocalAddressin class- InetAddress
- Returns:
- a booleanindicating if the InetAddress is a site local address; or false if address is not a site local unicast address.
 
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isMCGlobalpublic boolean isMCGlobal() Utility routine to check if the multicast address has global scope.- Overrides:
- isMCGlobalin class- InetAddress
- Returns:
- a booleanindicating 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
 
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isMCNodeLocalpublic boolean isMCNodeLocal() Utility routine to check if the multicast address has node scope.- Overrides:
- isMCNodeLocalin class- InetAddress
- Returns:
- a booleanindicating 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
 
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isMCLinkLocalpublic boolean isMCLinkLocal() Utility routine to check if the multicast address has link scope.- Overrides:
- isMCLinkLocalin class- InetAddress
- Returns:
- a booleanindicating 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
 
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isMCSiteLocalpublic boolean isMCSiteLocal() Utility routine to check if the multicast address has site scope.- Overrides:
- isMCSiteLocalin class- InetAddress
- Returns:
- a booleanindicating 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
 
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isMCOrgLocalpublic boolean isMCOrgLocal() Utility routine to check if the multicast address has organization scope.- Overrides:
- isMCOrgLocalin class- InetAddress
- Returns:
- a booleanindicating 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
 
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getAddresspublic byte[] getAddress() Returns the raw IP address of thisInetAddressobject. The result is in network byte order: the highest order byte of the address is ingetAddress()[0].- Overrides:
- getAddressin class- InetAddress
- Returns:
- the raw IP address of this object.
 
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getHostAddresspublic String getHostAddress() Returns the IP address string in textual presentation form.- Overrides:
- getHostAddressin class- InetAddress
- Returns:
- the raw IP address in a string format.
 
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hashCodepublic int hashCode() Returns a hashcode for this IP address.- Overrides:
- hashCodein class- InetAddress
- Returns:
- a hash code value for this IP address.
- See Also:
- Object.equals(java.lang.Object),- System.identityHashCode(java.lang.Object)
 
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equalspublic boolean equals(Object obj) Compares this object against the specified object. The result istrueif and only if the argument is notnulland it represents the same IP address as this object.Two instances of InetAddressrepresent the same IP address if the length of the byte arrays returned bygetAddressis the same for both, and each of the array components is the same for the byte arrays.- Overrides:
- equalsin class- InetAddress
- Parameters:
- obj- the object to compare against.
- Returns:
- trueif the objects are the same;- falseotherwise.
- See Also:
- InetAddress.getAddress()
 
 
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