public class EnumLearn {public static void main(String[] args) {Person person1 = new Person();Person person2 = new Person();person1.setUsername("張三");person1.setGender(Gender.MALE);person2.setUsername("張娜拉");person2.setGender(Gender.FEMALE);System.out.println("person1: " + person1); // person1: Person{gender=Gender{gender='男'}, username='張三'}System.out.println("person2: " + person2); // person2: Person{gender=Gender{gender='女'}, username='張娜拉'}System.out.println("Gender.FEMALE: " + Gender.FEMALE); // Gender.FEMALE: FEMALESystem.out.println("Gender.MALE: " + Gender.MALE); // Gender.MALE: MALESystem.out.println(Gender.MALE == Gender.FEMALE); // falseSystem.out.println(Gender.MALE == Gender.MALE); // trueSystem.out.println(Gender.MALE.getGender()); // 男System.out.println(Enum.valueOf(Gender.class, "FEMALE")); // FEMALESystem.out.println(Arrays.asList(Gender.values())); // [MALE, FEMALE]System.out.println("**************************");System.out.println("Gender2.FEMALE: " + Gender2.FEMALE.ordinal());} }/*** 枚舉類似于單例設計，構造方法私有化*/ enum Gender {MALE("男"), FEMALE("女");private String gender; // 枚舉值【男/女】private Gender(String gender){this.gender = gender;}public String getGender(){return gender;}}enum Gender2{ MALE, FEMALE}

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