Java InetAddress Create getHostAddress(InetAddress anAddress)

Description

Normalized version of java.net.InetAddress#getHostAddress() that handles IPv6 addresss formatting using the style of IETF RFC 2732 and also handles removal of IPv6 scoping identifiers.

License

Open Source License

Parameter

Parameter	Description
anAddress	The address to format as a <tt>String</tt>.

Return

The addresss formatted as a String.

Declaration

public static String getHostAddress(InetAddress anAddress)

Method Source Code

//package com.java2s;
/*//from ww w . j a  v a2  s .c  om
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import java.net.Inet6Address;
import java.net.InetAddress;

public class Main {
    /**
     * Normalized version of {@link java.net.InetAddress#getHostAddress()} that
     * handles IPv6 addresss formatting using the style of IETF RFC 2732 and
     * also handles removal of IPv6 scoping identifiers.
     *
     * @see <a href="http://www.ietf.org/rfc/rfc2732.txt" target="_blank">IETF RFC 2732 <i>MIME : IPv6 Literal Addresses in URL's</i></a>
     * @param anAddress The address to format as a <tt>String</tt>.
     * @return The addresss formatted as a String.
     */
    public static String getHostAddress(InetAddress anAddress) {
        String hostAddress;

        if (anAddress instanceof Inet6Address) {
            hostAddress = anAddress.getHostAddress();
            int percentAt = hostAddress.indexOf('%');

            if (-1 == percentAt) {
                // no scoping identifier. Just add the brackets.
                hostAddress = "[" + hostAddress + "]";
            } else {
                // Remove scoping identifier. They aren't relevant when published.
                hostAddress = "[" + hostAddress.substring(0, percentAt)
                        + "]";
            }
        } else {
            hostAddress = anAddress.getHostAddress();
        }

        return hostAddress;
    }
}