【java面试题】实现equals(Person person)方法的Person存入HashSet无法排重！

先看下面的代码，想下会输出什么？

public class HashSetDemo {
   
    public static void main(String[] args) {
   
        Person p1 = new Person("a", 1);
        Person p2 = new Person("a", 1);
        HashSet<Person> hashSet = new HashSet<>();
        hashSet.add(p1);
        hashSet.add(p2);
        System.out.println(hashSet.size());
        System.out.println(p1.equals(p2));
    }
}

class Person {
   
    String name;
    int age;

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

    public boolean equals(Person p) {
   
        return this.name.equals(p.name) && this.age == p.age;
    }

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

• 输出：