Class java.net.InetAddress
java.lang.Object
java.net.InetAddress
public final class InetAddress
implements Serializable
extends Object
This class represents an Internet Protocol (IP) address.
Applications should use the methods getLocalHost, getByName, or getAllByName to create a new InetAddress instance.
See Also:
- getAllByName
- getByName
- getLocalHost
Method Index
Method
|
Description
|
boolean equals(Object)
|
Compares this object against the specified object.
|
byte[] getAddress()
|
Returns the raw IP address of thisInetAddress object.
|
InetAddress[] getAllByName(String)
|
Determines all the IP addresses of a host, given the host's name.
|
InetAddress getByName(String)
|
Determines the IP address of a host, given the host's name.
|
String getHostAddress()
|
Returns the IP address string "%d.%d.%d.%d".
|
String getHostName()
|
Gets the host name for this IP address.
|
InetAddress getLocalHost()
|
Returns the local host.
|
int hashCode()
|
Returns a hash code for this IP address.
|
Boolean isMulticastAddress()
|
Utility routine to check if the InetAddress is an IP multicast address.
|
String toString()
|
Converts this IP address to a String.
|
Methods
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 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.
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 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 - the object to compare against.
- Returns : true if the objects are the same; false otherwise.
- Overrides : equals in class Object
public 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 : the raw IP address of this object.
GetAllByName :
public static InetAddress[] getAllByName(String host) throws UnknownHostException
Determines all the IP addresses of a host, given the host's name. The host name can either be a machine name, such as "java.sun.com", or a string representing its IP address, such as "206.26.48.100".
If there is a security manager and host is not null and host.length() is not equal to zero, the security manager's checkConnect method is called with the hostname and -1 as its arguments to see if the operation is allowed.
GetHostAddress
GetHostName
GetLocalHost
public static synchronized InetAddress getLocalHost() throws UnknownHostException
Determines all the IP addresses of a host, given the host's name. The host name can either be a machine name, such as "java.sun.com", or a string representing its IP address, such as "206.26.48.100".
If there is a security manager and host is not null and host.length() is not equal to zero, the security manager's checkConnect method is called with the hostname and -1 as its arguments to see if the operation is allowed.
- Parameters : host - the name of the host.
- Returns : an array of all the IP addresses for a given host name.
- Throws : UnknownHostException if no IP address for the host could be found.
- Throws : SecurityException if a security manager exists and its checkConnect method doesn't allow the operation.
public static InetAddress getByName(String host) throws UnknownHostException
Determines the IP address of a host, given the host's name. The host name can either be a machine name, such as "java.sun.com", or a string representing its IP address, such as "206.26.48.100".
- Parameters : host - the specified host, or null for the local host.
- Returns : an IP address for the given host name.
- Throws : UnknownHostException if no IP address for the host could be found.
public String getHostAddress()
Returns the IP address string "%d.%d.%d.%d".
- Returns : the raw IP address in a string format.
public String getHostName()
Gets the host name for this IP address.
If there is a security manager, its checkConnect method is first called with the hostname and -1 as its arguments to see if the operation is allowed.
- Returns : the host name for this IP address.
- Throws : SecurityException if a security manager exists and its checkConnect method doesn't allow the operation.
GetLocalHost
public static synchronized InetAddress getLocalHost() throws UnknownHostException
Returns the local host.
If there is a security manager, its checkConnect method is called with the local host name and -1 as its arguments to see if the operation is allowed.
- Returns : the IP address of the local host.
- Throws : UnknownHostException if no IP address for the host could be found.
- Throws : SecurityException if a security manager exists and its checkConnect method doesn't allow the operation.
HashCode
public int hashCode()
Returns a hashcode for this IP address.
public int hashCode()
Returns a hashcode for this IP address.
- Returns : a hash code value for this IP address.
- Overrides : hashCode in class Object
isMulticastAddress
public 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.
public String toString()
Converts this IP address to a String.
public 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 : a boolean indicating if the InetAddress is an IP multicast address
public String toString()
Converts this IP address to a String.
- Returns : a string representation of this IP address.
- Overrides : toString in class Object
No comments:
Post a Comment