public class InetSocketAddress extends SocketAddress
It provides an immutable object used by sockets for binding, connecting, or as returned values.
The wildcard is a special local IP address. It usually means "any" and can only be used for bind
operations.
Socket
,
ServerSocket
,
Serialized FormConstructor and Description |
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InetSocketAddress(InetAddress addr,
int port)
Creates a socket address from an IP address and a port number.
|
InetSocketAddress(int port)
Creates a socket address where the IP address is the wildcard address and the port number a specified value.
|
InetSocketAddress(java.lang.String hostname,
int port)
Creates a socket address from a hostname and a port number.
|
Modifier and Type | Method and Description |
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static InetSocketAddress |
createUnresolved(java.lang.String host,
int port)
Creates an unresolved socket address from a hostname and a port number.
|
boolean |
equals(java.lang.Object obj)
Compares this object against the specified object.
|
InetAddress |
getAddress()
Gets the
InetAddress . |
java.lang.String |
getHostName()
Gets the
hostname . |
java.lang.String |
getHostString()
Returns the hostname, or the String form of the address if it doesn't have a hostname (it was created using a
literal).
|
int |
getPort()
Gets the port number.
|
int |
hashCode()
Returns a hashcode for this socket address.
|
boolean |
isUnresolved()
Checks whether the address has been resolved or not.
|
java.lang.String |
toString()
Constructs a string representation of this InetSocketAddress.
|
public InetSocketAddress(int port)
A valid port value is between 0 and 65535. A port number of zero
will let the system pick up an ephemeral
port in a bind
operation.
port
- The port numberjava.lang.IllegalArgumentException
- if the port parameter is outside the specified range of valid port values.public InetSocketAddress(@Nullable InetAddress addr, int port)
A valid port value is between 0 and 65535. A port number of zero
will let the system pick up an ephemeral
port in a bind
operation.
A null
address will assign the wildcard address.
addr
- The IP addressport
- The port numberjava.lang.IllegalArgumentException
- if the port parameter is outside the specified range of valid port values.public InetSocketAddress(java.lang.String hostname, int port)
An attempt will be made to resolve the hostname into an InetAddress. If that attempt fails, the address will be flagged as unresolved.
If there is a security manager, its checkConnect
method is called with the host name as its argument to
check the permission to resolve it. This could result in a SecurityException.
A valid port value is between 0 and 65535. A port number of zero
will let the system pick up an ephemeral
port in a bind
operation.
hostname
- the Host nameport
- The port numberjava.lang.IllegalArgumentException
- if the port parameter is outside the range of valid port values, or if the hostname parameter is
null.java.lang.SecurityException
- if a security manager is present and permission to resolve the host name is denied.isUnresolved()
public static InetSocketAddress createUnresolved(java.lang.String host, int port)
No attempt will be made to resolve the hostname into an InetAddress. The address will be flagged as unresolved.
A valid port value is between 0 and 65535. A port number of zero
will let the system pick up an ephemeral
port in a bind
operation.
host
- the Host nameport
- The port numberInetSocketAddress
representing the unresolved socket addressjava.lang.IllegalArgumentException
- if the port parameter is outside the range of valid port values, or if the hostname parameter is
null.isUnresolved()
public final int getPort()
@Nullable public final InetAddress getAddress()
InetAddress
.null
if it is unresolved.public final java.lang.String getHostName()
hostname
. Note: This method may trigger a name service reverse lookup if the address was created
with a literal IP address.public final java.lang.String getHostString()
public final boolean isUnresolved()
true
if the hostname couldn't be resolved into an InetAddress
.public java.lang.String toString()
toString
in class java.lang.Object
public final boolean equals(@Nullable java.lang.Object obj)
true
if and only if the argument is not
null
and it represents the same address as this object.
Two instances of InetSocketAddress
represent the same address if both the InetAddresses (or hostnames if
it is unresolved) and port numbers are equal. If both addresses are unresolved, then the hostname and the port
number are compared.
Note: Hostnames are case insensitive. e.g. "FooBar" and "foobar" are considered equal.
equals
in class java.lang.Object
obj
- the object to compare against.true
if the objects are the same; false
otherwise.InetAddress.equals(java.lang.Object)
public final int hashCode()
hashCode
in class java.lang.Object