public static boolean isAbsoluteUri(String uri) {

        return (uri == null) || ((uri.length() >= 1) && ((uri.charAt(0) == '/') || hasScheme(uri)));
    }
public static boolean isAbsoluteUri ( String uri ) { return ( uri == null ) || ( ( uri . length ( ) >= 1 ) && ( ( uri . charAt ( 0 ) == '/' ) || hasScheme ( uri ) ) ) ; }
Returns <code>true</code> in case the given URI is absolute.<p>

An URI is considered absolute if one of the following is true:<ul>
<li>The URI starts with a <code>'/'</code> char.
<li>The URI contains a <code>':'</code> in the first 10 chars.
<li>The URI is <code>null</code>
</ul>

@param uri the URI to test

@return <code>true</code> in case the given URI is absolute