What is EnumMap in Java and When to Use It

Uğur Taş
Codimis
Published in
6 min readMar 6, 2024

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EnumMap in Java

Java provides various data structures to store and manipulate data efficiently. One such data structure is EnumMap, which is a specialized implementation of the Map interface. In this article, we will explore EnumMap in detail, including its purpose, advantages, and use cases, with examples to illustrate its functionality.

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Understanding EnumMap

An EnumMap is a concrete implementation of the Map interface that uses an enum type as its key. Unlike other Map implementations like HashMap or TreeMap, EnumMap is designed specifically to work with enum types.

When working with enum keys, enumMap is better compared to general-purpose Map implementations. Because enumMap’s specialized design allows for more efficient memory usage and better performance.

Key Features of EnumMap

Enum Keys: EnumMap uses enumeration types as keys, ensuring type safety and preventing…

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Uğur Taş
Codimis

A software developer with a high passion for learning, improving skills, and sharing knowledge. My motto is “fail million times if you take lessons every time”