InterfaceAddress (Java Platform SE 6) - JDK 5 Documentation v6.0, Java 2 SDK 英文文档

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Java™ Platform
Standard Ed. 6

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java.net
Class InterfaceAddress

java.lang.Object
  java.net.InterfaceAddress

public class InterfaceAddress
extends Object
extends Object

This class represents a Network Interface address. In short it's an IP address, a subnet mask and a broadcast address when the address is an IPv4 one. An IP address and a network prefix length in the case of IPv6 address.

Since:: 1.6
See Also:: NetworkInterface

Method Summary

boolean equals(Object obj)
          Compares this object against the specified object.

InetAddress getAddress()
          Returns an InetAddress for this address.

InetAddress getBroadcast()
          Returns an InetAddress for the brodcast address for this InterfaceAddress.

short getNetworkPrefixLength()
          Returns the network prefix length for this address.

int hashCode()
          Returns a hashcode for this Interface address.

String toString()
          Converts this Interface address to a String.

Methods inherited from class java.lang.Object

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

Method Summary
`boolean`	`equals(Object obj)` Compares this object against the specified object.
`InetAddress`	`getAddress()` Returns an `InetAddress` for this address.
`InetAddress`	`getBroadcast()` Returns an `InetAddress` for the brodcast address for this InterfaceAddress.
`short`	`getNetworkPrefixLength()` Returns the network prefix length for this address.
`int`	`hashCode()` Returns a hashcode for this Interface address.
`String`	`toString()` Converts this Interface address to a `String`.

Methods inherited from class java.lang.Object
`clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

Method Detail

getAddress

public InetAddress getAddress()

Returns an InetAddress for this address.

Returns:: the InetAddress for this address.

getBroadcast

public InetAddress getBroadcast()

Returns an InetAddress for the brodcast address for this InterfaceAddress.

Only IPv4 networks have broadcast address therefore, in the case of an IPv6 network, null will be returned.

Returns:: the InetAddress representing the broadcast address or null if there is no broadcast address.

getNetworkPrefixLength

public short getNetworkPrefixLength()

Returns the network prefix length for this address. This is also known as the subnet mask in the context of IPv4 addresses. Typical IPv4 values would be 8 (255.0.0.0), 16 (255.255.0.0) or 24 (255.255.255.0).

Typical IPv6 values would be 128 (::1/128) or 10 (fe80::203:baff:fe27:1243/10)

Returns:: a short representing the prefix length for the subnet of that address.

equals

public 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 interface address as this object.

Two instances of InterfaceAddress represent the same address if the InetAddress, the prefix length and the broadcast are the same for both.

Overrides:: equals in class Object

Parameters:: obj - the object to compare against.
Returns:: true if the objects are the same; false otherwise.
See Also:: hashCode()

hashCode

public int hashCode()

Returns a hashcode for this Interface address.

Overrides:: hashCode in class Object

Returns:: a hash code value for this Interface address.
See Also:: Object.equals(java.lang.Object), Hashtable

toString

public String toString()

Converts this Interface address to a String. The string returned is of the form: InetAddress / prefix length [ broadcast address ].

Overrides:: toString in class Object

Returns:: a string representation of this Interface address.