1. LinkedHashMap 简介

1.1 基本组成单元 Entry

 static class Entry<K,V> extends HashMap.Node<K,V> {
        Entry<K,V> before, after;
        Entry(int hash, K key, V value, Node<K,V> next) {
            super(hash, key, value, next);
        }
    }

引用

https://blog.csdn.net/weixin_30648587/article/details/99547479