Difference between collection and map.

Question

Accepted Answer

Collection is a group of objects while Map is a key-value pair data structure.

Collection is used to store and manipulate a group of objects.
Map is used to store and retrieve data based on key-value pairs.
Collection classes include List, Set, and Queue.
Map classes include HashMap, TreeMap, and LinkedHashMap.
Collections allow duplicate elements while Maps do not.
Example: Collection - List of names, Map - Student ID and corresponding name.

Accepted Answer

n Java, Set and Map are two important interfaces available in the collection framework. Both Set and Map interfaces are used to store a collection of objects as a single unit. The main difference between Set and Map is that Set is unordered and contains different elements, whereas Map contains the data in the key-value pair.

Difference between collection and map.

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