Map1

Introduction to Map

A map contains values on the basis of key, i.e. key and value pair. Each key and value pair is known as an entry. A Map contains unique keys.

A Map doesn't allow duplicate keys, but you can have duplicate values. HashMap and LinkedHashMap allow null keys and values, but TreeMap doesn't allow any null key or value.

Short Video Lecture

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VisualCodeChat Tutoring

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After-class Exercises

(Exercises here)