如何根據性別枚舉類型創建 N 個列表？如果我有 3 個可能的 GENDER 枚舉（男性、女性、其他），我需要 3 個列表。如何使用 java 8 流 API 實現此目的？在這種情況下，我需要像帶有 3 個鍵的 MAP 之類的東西。genderMap.get(GENDER.male)。Map<GENDER, List<Person>> genderMap;嘗試使用 partitioningByMap<Boolean, List<Person>> genderMap= people.stream().collect(Collectors.partitioningBy(malePredicate()));System.out.println("MALE "+genderMap.get(true));System.out.println("FEMALE "+genderMap.get(false));private static Predicate<Person> malePredicate(){    return p ->  p.getGender() != null && p.getGender().equalsIgnoreCase("male");}private static Predicate<Person> femalePredicate(){    return p ->  p.getGender() != null && p.getGender().equalsIgnoreCase("female");}MALE [Person [id=1, name=SAMPLE_1, age=11, gender=male, sal=100, monthlyExpenseAmount=120.00], Person [id=2, name=SAMPLE_2, age=12, gender=male, sal=100 , monthlyExpenseAmount=120.00]]FEMALE [Person [id=0, name=SAMPLE_0, age=10, gender=other, sal=100, monthlyExpenseAmount=120.00], Person [id=3, name=SAMPLE_3, age=13, gender=female, sal=100 , monthlyExpenseAmount=100.00], 人 [id=4, name=SAMPLE_4, age=14, gender=female, sal=100, monthlyExpenseAmount=100.00], Person [id=5, name=SAMPLE_5, age=15, gender=female , sal=100, monthlyExpenseAmount=100.00]]