If the elements of an enumerated type are used primarily in sets, it is traditional to use the int enum pattern (Item 34), assigning a different power of 2 to each ...

// Parameter is bitwise OR of zero or more STYLE_ constants public void applyStyles(int styles) { ... } This representation lets you use the bitwise OR operation to combine several constants into a ...

As their names imply, EnumSet implements Set and EnumMap implements Map, so they can generally be used anywhere those interfaces apply and generally support the methods and contracts of those ...