Serializablepublic 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.
| Constructor | Description |
|---|---|
InetSocketAddress |
Creates a socket address where the IP address is the wildcard address and the port number a specified value. |
InetSocketAddress |
Creates a socket address from a hostname and a port number. |
InetSocketAddress |
Creates a socket address from an IP address and a port number. |
| Modifier and Type | Method | Description |
|---|---|---|
static InetSocketAddress |
createUnresolved |
Creates an unresolved socket address from a hostname and a port number. |
final boolean |
equals |
Compares this object against the specified object. |
final InetAddress |
getAddress() |
Gets the InetAddress. |
final String |
getHostName() |
Gets the hostname. |
final 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). |
final int |
getPort() |
Gets the port number. |
final int |
hashCode() |
Returns a hashcode for this socket address. |
final boolean |
isUnresolved() |
Checks whether the address has been resolved or not. |
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 numberIllegalArgumentException - if the port parameter is outside the specified range of valid port values.public InetSocketAddress(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 numberIllegalArgumentException - if the port parameter is outside the specified range of valid port values.public InetSocketAddress(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 numberIllegalArgumentException - if the port parameter is outside the range of valid port values, or if the hostname parameter is null.SecurityException - if a security manager is present and permission to resolve the host name is denied.public static InetSocketAddress createUnresolved(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 addressIllegalArgumentException - if the port parameter is outside the range of valid port values, or if the hostname parameter is null.public final int getPort()
public final InetAddress getAddress()
InetAddress.null if it is unresolved.public final 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 String getHostString()
public final boolean isUnresolved()
true if the hostname couldn't be resolved into an InetAddress.public String toString()
InetAddress.toString() on the InetAddress and concatenating the port number (with a colon). If the address is an IPv6 address, the IPv6 literal is enclosed in square brackets, for example: "localhost/[0:0:0:0:0:0:0:1]:80". If the address is unresolved, <unresolved> is displayed in place of the address literal, for example "foo/<unresolved>:80".
To retrieve a string representation of the hostname or the address, use getHostString(), rather than parsing the string returned by this toString() method.
public final boolean equals(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.
public final int hashCode()
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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/net/InetSocketAddress.html