Method put

lib/java/util/HashMap.java:557–560

Maps the specified key to the specified value. @param key the key. @param value the value. @return the value of any previous mapping with the specified key or null if there was no such mapping.

(K key, V value)

     *         {@code null} if there was no such mapping.
     */
    @Override
    public V put(K key, V value) {
        return putImpl(key, value);
    }

    V putImpl(K key, V value) {
        Entry<K,V> entry;