Method find

chapter06/src/main/java/com/seaofnodes/simple/Utils.java:33–38

Search a list for an element by reference @param ary List to search in @param x Object to be searched @return >= 0 on success, -1 on failure

( ArrayList<E> ary, E x )

     * @return >= 0 on success, -1 on failure
     */
    public static <E> int find( ArrayList<E> ary, E x ) {
        for( int i=0; i<ary.size(); i++ )
            if( ary.get(i)==x )
                return i;
        return -1;
    }
}