/**
* Get an IPv6 address with long format. Return IPv6 address without ::, e.g. ::1 =>
* 0:0:0:0:0:0:0:1
*
* @param inet6Address the IPv6 address to format
* @return long format IPv6 address
* @throws UnknownHostException if host with IPv6 address is not alive
*/
public static String getLongInet6Address(String inet6Address) throws UnknownHostException {
String longAddress = Inet6Address.getByName(inet6Address).getHostAddress();
return longAddress;
}
/**
* Compress an IPv6 address. Return compressed address, e.g. 0:0:0:0:0:0:0:01 => ::1
*
* @param inet6Address the IPv6 address to compress
* @return compressed IPv6 address
* @throws UnknownHostException if host with IPv6 address is not alive
*/
public static String getCompressedInet6Address(String inet6Address) throws UnknownHostException {
String longAddress = Inet6Address.getByName(inet6Address).getHostAddress();
return longAddress.replaceFirst("(^|:)(0+(:|$)){2,8}", "::");
}