Method clear

lib/java/util/HashMap.java:353–360

Removes all mappings from this hash map, leaving it empty. @see #isEmpty @see #size

()

     * @see #size
     */
    @Override
    public void clear() {
        if (elementCount > 0) {
            elementCount = 0;
            Arrays.fill(elementData, null);
            modCount++;
        }
    }

    /**
     * Returns a shallow copy of this map.