public V put(K key, V value) {    //假如table为空    if (table == EMPTY_TABLE) {        inflateTable(threshold);    }    //假如键为空    if (key == null)        return putForNullKey(value);    int hash = hash(key);    int i = indexFor(hash, table.length);    //遍历table[i]    for (Entry
     
       e = table[i]; e != null; e = e.next) {        Object k;        if (e.hash == hash && ((k = e.key) == key || key.equals(k))) {            V oldValue = e.value;            e.value = value;            e.recordAccess(this);            return oldValue;        }    }        modCount++;    //添加数组    addEntry(hash, key, value, i);    return null;}