Enumeration, subset

java.util.EnumSet

Code-example:

public enum Example { ONE, TWO, THREE, FOUR, FIVE, SIX }
 
EnumSet<Example> eAll        = EnumSet.allOf(Example.class);  // ONE, TWO, THREE, FOUR, FIVE, SIX
EnumSet<Example> eOf         = EnumSet.of(TWO, FOUR);        // TWO, FOUR
EnumSet<Example> eRange      = EnumSet.range(TWO, FOUR);     // TWO, THREE, FOUR
EnumSet<Example> eComplement = EnumSet.complementOf(eRange);  // ONE, FIVE, SIX