Bug Description:
The java.net.CookieHandler does not work with localhost and any host name without a dot. The bug seems in the implementation of java.net.HttpCookie.domainMatch() or the usage in java.netCookiePolicy. ACCEPT_ORIGINAL_SERVER.

Working host names:
        MyHost.local
         127.0.0.1
         any IPv4 address

Not working host names:
         MyHost
         [::1]
         any IPv6 address

We see the problem with Java 6 and 7. It is not a regression.

To run the follow code you need only a local http server which send a cookie. For example a session cookie.

        URL url = new URL( "http://localhost/ );
        HttpURLConnection urlConnection = (HttpURLConnection)url.openConnection();
        urlConnection.connect();
        urlConnection.getInputStream();
        if (newcookie != null) {
            CookieHandler cookieHandler = CookieHandler.getDefault();
            if (cookieHandler == null) {
                cookieHandler = new java.net.CookieManager();
                CookieHandler.setDefault( cookieHandler );
            }
            try {
                cookieHandler.put( urlConnection.getURL().toURI(), urlConnection.getHeaderFields() );
                Map<String, List<String>> map = cookieHandler.get( urlConnection.getURL().toURI(), urlConnection.getHeaderFields() );
                if (map.containsKey( "Cookie" )) {
                    List<String> list = map.get( "Cookie" ); // The list is empty for localhost and host names without dot
                    if (list != null && list.size()>0) {
                        String element = list.get( 0 );
                        if (element != null && element.length()>0) {
                            setCookie(element); // Use for the next request
                        }
                    }
                }
            } catch( URISyntaxException e ) {
                e.printStackTrace();
            }
        }