public interface InetAddressResolver
InetAddress delegates all lookup operations to the system-wide resolver. The system-wide resolver can be customized by deploying an implementation of InetAddressResolverProvider.
| Modifier and Type | Interface | Description |
|---|---|---|
static final class |
InetAddressResolver.LookupPolicy |
A LookupPolicy object describes characteristics that can be applied to a lookup operation. |
| Modifier and Type | Method | Description |
|---|---|---|
String |
lookupByAddress |
Lookup the host name corresponding to the raw IP address provided. |
Stream |
lookupByName |
Given the name of a host, returns a stream of IP addresses of the requested address family associated with a provided hostname. |
Stream<InetAddress> lookupByName(String host, InetAddressResolver.LookupPolicy lookupPolicy) throws UnknownHostException
host should be a machine name, such as "www.example.com", not a textual representation of its IP address. No validation is performed on the given host name: if a textual representation is supplied, the name resolution is likely to fail and UnknownHostException may be thrown.
The address family type and addresses order are specified by the LookupPolicy instance. Lookup operation characteristics could be acquired with InetAddressResolver.LookupPolicy.characteristics(). If InetAddressResolver.LookupPolicy.IPV4 and InetAddressResolver.LookupPolicy.IPV6 characteristics provided then this method returns addresses of both IPV4 and IPV6 families.
host - the specified hostnamelookupPolicy - the address lookup policyNullPointerException - if either parameter is null
UnknownHostException - if no IP address for the host could be foundString lookupByAddress(byte[] addr) throws UnknownHostException
addr argument is in network byte order: the highest order byte of the address is in addr[0].
IPv4 address byte array must be 4 bytes long and IPv6 byte array must be 16 bytes long.
addr - byte array representing a raw IP addressString representing the host name mappingUnknownHostException - if no host name is found for the specified IP addressIllegalArgumentException - if the length of the provided byte array doesn't correspond to a valid IP address lengthNullPointerException - if addr is null
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https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/net/spi/InetAddressResolver.html