DnsResolver

All Known Implementing Classes:

InMemoryDnsResolver, SystemDefaultDnsResolver
```
@Contract(threading=STATELESS)
public interface DnsResolver
```
Users may implement this interface to override the normal DNS lookup offered by the OS.

Since:

4.2

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`java.net.InetAddress[]`	`resolve(java.lang.String host)`	Returns the IP address for the specified host name, or null if the given host is not recognized or the associated IP address cannot be used to build an InetAddress instance.
`default java.util.List<java.net.InetSocketAddress>`	`resolve(java.lang.String host, int port)`	Returns a list of `InetSocketAddress` for the given host with the given port.
`java.lang.String`	`resolveCanonicalHostname(java.lang.String host)`	Gets the fully qualified domain name for given host name.

- Method Detail
  - resolve
```
java.net.InetAddress[] resolve(java.lang.String host)
                        throws java.net.UnknownHostException
```
    Returns the IP address for the specified host name, or null if the given host is not recognized or the associated IP address cannot be used to build an InetAddress instance.
    
    Parameters:
    
    host - The host name to be resolved by this resolver.
    
    Returns:
    
    The IP address associated to the given host name, or null if the host name is not known by the implementation class.
    
    Throws:
    
    java.net.UnknownHostException
    
    See Also:
    
    InetAddress
  - resolveCanonicalHostname
```
java.lang.String resolveCanonicalHostname(java.lang.String host)
                                   throws java.net.UnknownHostException
```
    Gets the fully qualified domain name for given host name.
    
    Throws:
    
    java.net.UnknownHostException
    
    Since:
    
    5.0
  - resolve
```
default java.util.List<java.net.InetSocketAddress> resolve(java.lang.String host,
                                                           int port)
                                                    throws java.net.UnknownHostException
```
    Returns a list of InetSocketAddress for the given host with the given port.
    
    Throws:
    
    java.net.UnknownHostException
    
    Since:
    
    5.5
    
    See Also:
    
    InetSocketAddress