When all the keys of a Map are values from the same enum, the Map can be replaced with an EnumMap, which can be much more
efficient than other sets because the underlying data structure is a simple array.
Noncompliant Code Example
public class MyClass {
public enum COLOR {
RED, GREEN, BLUE, ORANGE;
}
public void mapMood() {
Map<COLOR, String> moodMap = new HashMap<COLOR, String> ();
}
}
Compliant Solution
public class MyClass {
public enum COLOR {
RED, GREEN, BLUE, ORANGE;
}
public void mapMood() {
EnumMap<COLOR, String> moodMap = new EnumMap<> (COLOR.class);
}
}
