慕课在线编辑器

代码提交代码

import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import java.util.stream.Stream;

public class StreamDemo4 {

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

public Person() { }

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

public String getName() {
            return name;
        }

public void setName(String name) {
            this.name = name;
        }

public int getAge() {
            return age;
        }

public void setAge(int age) {
            this.age = age;
        }

@Override
        public String toString() {
            return "Person{" +
                    "name='" + name + '\'' +
                    ", age=" + age +
                    '}';
        }

@Override
        public boolean equals(Object o) {
            if (this == o) return true;
            if (o == null || getClass() != o.getClass()) return false;
            Person person = (Person) o;
            return age == person.age &&
                    Objects.equals(name, person.name);
        }

@Override
        public int hashCode() {
            return Objects.hash(name, age);
        }
    }

/**
     * 创建一个Person的集合
     * @return List
     */
    public static List<Person> createPeople() {
        ArrayList<Person> people = new ArrayList<>();
        people.add(new Person("小明", 15));
        people.add(new Person("小芳", 20));
        people.add(new Person("小李", 18));
        people.add(new Person("小付", 23));
        people.add(new Person("小付", 23));
        people.add(new Person("大飞", 22));
        people.add(new Person("大飞", 22));
        people.add(new Person("大飞", 22));
        return people;
    }

public static void main(String[] args) {
        List<Person> people = createPeople();
        // 创建 Stream 对象
        Stream<Person> stream = people.stream();

System.out.println("去重前，集合中元素有：");
        stream.forEach(System.out::println);

System.out.println("去重后，集合中元素有：");
        // 创建一个新流
        Stream<Person> stream1 = people.stream();
        // 截断流，并调用终止操作打印集合中元素
        stream1.distinct().forEach(System.out::println);
    }
}

运行结果