按属性对对象列表进行分组，并将其他剩余属性设置为不同的对象列表: Java 8 stream和Lambdas

import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

public class GroupingExample {
    public static void main(String[] args) {
        // 创建对象列表
        List<Person> persons = Arrays.asList(
                new Person("Alice", 25, "Female"),
                new Person("Bob", 30, "Male"),
                new Person("Charlie", 35, "Male"),
                new Person("Diana", 28, "Female"),
                new Person("Eva", 32, "Female")
        );

        // 使用Stream API和Lambda表达式对对象列表进行分组
        Map<String, List<Person>> groupedPersons = persons.stream()
                .collect(Collectors.groupingBy(Person::getGender));

        // 打印分组结果
        for (Map.Entry<String, List<Person>> entry : groupedPersons.entrySet()) {
            System.out.println("Group: " + entry.getKey());
            for (Person person : entry.getValue()) {
                System.out.println(person.getName());
            }
            System.out.println();
        }
    }

    static class Person {
        private String name;
        private int age;
        private String gender;

        public Person(String name, int age, String gender) {
            this.name = name;
            this.age = age;
            this.gender = gender;
        }

        public String getName() {
            return name;
        }

        public int getAge() {
            return age;
        }

        public String getGender() {
            return gender;
        }
    }
}