Introduction to Programming

Answer

Assuming the enum class looks like the following:

enum Transport { AIRPLANE, BUS, CAR, TRAIN, TRUCK }

Then the code that demonstrates the four methods of EnumSet may look like this:

EnumSet<Transport> set1 = EnumSet.allOf(Transport.class);System.out.println(set1);   //prints: [AIRPLANE, BUS, CAR, TRAIN, TRUCK]EnumSet<Transport> set2 = EnumSet.range(Transport.BUS, Transport.TRAIN);System.out.println(set2);   //prints: [BUS, CAR, TRAIN]EnumSet<Transport> set3 = EnumSet.of(Transport.BUS, Transport.TRUCK);System.out.println(set3);   //prints: [BUS, TRUCK]EnumSet<Transport> set4 = EnumSet.complementOf(set3);System.out.println(set4);   //prints: [AIRPLANE, CAR, TRAIN]