Is the implementation of Map, which doesn't maintain any order.a)linkedhash mapb)hashmapc)treemapd)liste)map

1. Break Down the Problem

We need to identify the type of Map implementation in Java that does not maintain order. The options provided are:

a) LinkedHashMap
b) HashMap
c) TreeMap
d) List
e) Map

2. Relevant Concepts

• HashMap: This is an implementation of the Map interface which does not maintain any order of its elements. It uses a hash table for storage.
• LinkedHashMap: Maintains a linked list of the entries, which defines the iteration ordering.
• TreeMap: Implements the Map interface and sorts the elements based on their natural ordering or a specified comparator.
• List: This is a different interface (not a Map) that maintains the order of elements.
• Map: This is a general interface and doesn't specify order; however, the implementations define how they maintain order.

3. Analysis and Detail

Out of the options given:

• LinkedHashMap maintains insertion order.
• TreeMap sorts entries.
• List is not a Map.
• Map is a general term for the interface.

Thus, the only option that does not maintain any order is HashMap.

4. Verify and Summarize

To summarize, the implementation of Map that does not maintain any order is:

Final Answer

b) HashMap