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I guess you are getting confused between HashTable and hash table.
https://docs.oracle.com/javase/8/docs/api/java/util/Hashtable.html If you see there it says "HashTable class implements a hash table, which maps keys to values". So all implementations of Map interface are hash table implementations and HashTable class is also implements hash table. It also implements linked list that's how it maintains insertion order.
Jun 22, 2016, 12:23:26 PM
Posted to LinkedHashMap in Java With Examples