java中LinkedHashMap添加元素

void addEntry(int hash, K key, V value, int bucketIndex) {

    createEntry(hash, key, value, bucketIndex);

    // Remove eldest entry if instructed, else grow capacity if appropriate

    Entry<K,V> eldest = header.after;

    if (removeEldestEntry(eldest)) {

        removeEntryForKey(eldest.key);

    } else {

        if (size >= threshold)

            resize(2 * table.length);

   }

}