java中的enumset小结

java中的enumset其实是set的一个实现类了，但平常比较少用到，所以小结归纳下：

1 先定义一个枚举
  public enum Seasons {
    AUTMN,WINTER,SPRING,SUMMER
}

   测试：

 public static void main(String[] args) {
        EnumSet<Seasons> coldSeasons = EnumSet.of(Seasons.AUTMN, Seasons.WINTER);
        for (Seasons seasons : coldSeasons) {
            System.out.println("SEASON:"+seasons.name());
        }
       
    }
        

   使用of方法创建新的enumset，并且可以遍历，输出：
  SEASON:AUTUMN SEASON:WINTER

2 allOf 输出所有枚举元素
 

     EnumSet seasons = EnumSet.allOf(Seasons.class);
        for (Seasons season : seasons) {
            System.out.println("SEASONS:"+season.name());
        }

    SEASONS:AUTUMN SEASONS:WINTER SEASONS:SPRING SEASONS:SUMMER

3 Enuset.noneOf 输出空的

4  rangeOf包括起和始的范围
  

 public static void main(String[] args) {
        EnumSet seasons = EnumSet.range(Seasons.AUTUMN,Seasons.SPRING);
        for (Seasons season : seasons) {
            System.out.println("SEASONS:"+season.name());
        }

  输出：SEASONS:AUTUMN SEASONS:WINTER SEASONS:SPRING

5 complementOf方法，排除某个元素，比如
  

 EnumSet seasons = EnumSet.range(Seasons.AUTUMN,Seasons.SPRING);
        for (Seasons season : seasons) {
            System.out.println("SEASONS:"+season.name());
        }
        EnumSet complementEnumset = EnumSet.complementOf(seasons);
        for (Seasons season : complementEnumset) {
            System.out.println("SEASON:"+season.name());
        }

结果为：SEASON:SUMMER