public static boolean isAbsoluteUrl(final String url) {
	    if (url == null) {      	    // a null URL is not absolute
		    return false;
	    }
	    int colonPos;                   // fast simple check first
	    if ((colonPos = url.indexOf(':')) == -1) {
		    return false;
	    }

	    // if we DO have a colon, make sure that every character
	    // leading up to it is a valid scheme character
	    for (int i = 0; i < colonPos; i++) {
		    if (VALID_SCHEME_CHARS.indexOf(url.charAt(i)) == -1) {
			    return false;
		    }
	    }
	    return true;
    }
public static boolean isAbsoluteUrl ( final String url ) { if ( url == null ) { return false ; } int colonPos ; if ( ( colonPos = url . indexOf ( ':' ) ) == - 1 ) { return false ; } for ( int i = 0 ; i < colonPos ; i ++ ) { if ( VALID_SCHEME_CHARS . indexOf ( url . charAt ( i ) ) == - 1 ) { return false ; } } return true ; }
Returns <code>true</code> if current URL is absolute, <code>false</code> otherwise.