How has EnumMap changed in recent Java versions?

EnumMap is a specialized implementation of the Map interface in Java that is designed specifically for use with enum keys. It is highly efficient and can be used in scenarios where the keys are restricted to a finite set of enumerated constants. In recent Java versions, there have been enhancements in EnumMap to improve performance and ease of use.

Changes in EnumMap in Recent Java Versions

  • Improved performance for certain methods and memory usage.
  • Enhanced compatibility with other Map operations.
  • Additional convenience methods added for better usability.

Example of EnumMap

EnumMap activities = new EnumMap<>(Day.class); activities.put(Day.MONDAY, "Gym"); activities.put(Day.TUESDAY, "Reading"); activities.put(Day.WEDNESDAY, "Swimming"); for (Map.Entry entry : activities.entrySet()) { System.out.println(entry.getKey() + ": " + entry.getValue()); }

EnumMap Java Enum Map Performance Enhancement

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