Method get

java/18_hashtable/HashTable.java:164–177

获取 @param key @return

(K key)

     * @return
     */
    public V get(K key) {
        int index = hash(key);
        Entry<K, V> e = table[index];
        if (e == null || e.next == null) {
            return null;
        }
        while (e.next != null) {
            e = e.next;
            if (key == e.key) {
                return e.value;
            }
        }
        return null;
    }
}