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Java includes a very robust framework for data storage and manipulation. This framework is known as the collections framework, which consists of interfaces and their concrete implementations in the form of classes. Map is an interface in this Java collections framework which is used to store objects in the form of key value pairs. This key value pair is referred to as an entry in the map. Map doesn't allow duplicate values, and neither it maintains the insertion order because each value is associated with a key, and the values can be accessed easily with the help of their corresponding keys. So if you are looking to store key-value pairs in Java program,  you have a wide range of choices available depending upon your requirement. The main difference between Linked Hash Map, Tree Map, and Hash Map comes in their internal implementation and specific features, which makes them useful in certain scenarios.  Find out more in the above video.