Inspectopedia
 
2024.3

'Set' can be replaced with 'EnumSet'

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Last modified: 03 December 2024

Reports instantiations of java.util.Set objects whose content types are enumerated classes. Such Set objects can be replaced with java.util.EnumSet objects.

EnumSet implementations can be much more efficient compared to other sets, as the underlying data structure is a bit vector. Use the quick-fix to replace the initializer with a call to EnumSet.noneOf(). This quick-fix is not available when the type of the variable is a sub-class of Set.

Example:

After the quick-fix is applied: