Method shuffle

lib/java/util/Collections.java:1848–1850

Moves every element of the list to a random new position in the list. @param list the List to shuffle. @throws UnsupportedOperationException when replacing an element in the List is not supported.

(List<?> list)

     *             when replacing an element in the List is not supported.
     */
    public static void shuffle(List<?> list) {
        shuffle(list, new Random());
    }

    /**
     * Moves every element of the list to a random new position in the list