Java EnumMap<K,V> is a specialized Java Map implementation that maps Java Enum constants to values, offering better performance and type safety compared to other map implementations like Java HashMap. It is optimized for use with Enum types and guarantees that the keys are of the same enum type, which helps in reducing the risk of errors. Introduced in Java 2004 with Java 5, EnumMap is part of Java's java.util package and is ideal for use cases where keys are limited to a specific set of constant values.

https://docs.oracle.com/javase/8/docs/api/java/util/EnumMap.html