Enum set in java

  EnumSet<Gfg> set1, set2, set3, set4; 
  
        // Adding elements
        set1 = EnumSet.of(Gfg.QUIZ, Gfg.CONTRIBUTE,
                          Gfg.LEARN, Gfg.CODE);
        set2 = EnumSet.complementOf(set1);
        set3 = EnumSet.allOf(Gfg.class);
        set4 = EnumSet.range(Gfg.CODE, Gfg.CONTRIBUTE);
        System.out.println("Set 1: " + set1);
        System.out.println("Set 2: " + set2);
        System.out.println("Set 3: " + set3);
        System.out.println("Set 4: " + set4);

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