Which data structure is used to maintain the insertion order on a map?

LinkedHashMap is the data structure used to store the key-value pairs like HashMap but it guarantees the order of insertion(unlike the HashMap). So the elements are stored in the order of their insertion.Click to see full answer. Also, how do you maintain the order of insertion on a map?We cannot. The HashMap class does not maintain the order of the elements. This means that It might not return the elements in the same order they were inserted into it. If the application needs the elements to be returned in the same order they were inserted, LinkedHashMap should be used.Likewise, how is LinkedHashMap insertion order maintained? Java LinkedHashMap It maintains a linked list of the entries in the map, in the order in which they were inserted. This allows insertion-order iteration over the map. That is,when iterating through a collection-view of a LinkedHashMap, the elements will be returned in the order in which they were inserted. Just so, how do you maintain the insertion order in a list? Both ArrayList and LinkedList are implementation of List interface. They both maintain the elements insertion order which means while displaying ArrayList and LinkedList elements the result set would be having the same order in which the elements got inserted into the List.Does list preserve insertion order?List is an Ordered Collection while Set is an unordered Collection. List maintains insertion order of elements, means any element which is inserted before will go on lower index than any element which is inserted after. Set in Java doesn’t maintain any order.