在HashSet中包含相等的对象(Containing equal objects in the HashSet)

 您好我发现了一个与收藏相关的问题。 
 
public class Person {
    private String name;

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

    public boolean equals(Object o){
        if(!(o instanceof Person))return false;
        Person p=(Person)o;
        return p.name.equals(this.name);
    }

    public static void main(String[] args) {
        HashSet<Person> hs=new HashSet<Person>();
        hs.add(new Person("Hi"));
        hs.add(new Person("Hi"));
        hs.add(new Person("Hi"));
        hs.add(new Person("Hi"));

        System.out.println("Elements"+hs.size());
    }
}
 
 Hashset的大小为4.但不是必须为1吗？ 由于equals方法已实现，HashSet是否可以包含多个具有相同名称的Person对象？ 
 
 所有Person对象是否都具有相同的哈希码，因为hashCode方法没有被覆盖？ 

Hello I found a question like this related to collections.
 
public class Person {
    private String name;

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

    public boolean equals(Object o){
        if(!(o instanceof Person))return false;
        Person p=(Person)o;
        return p.name.equals(this.name);
    }

    public static void main(String[] args) {
        HashSet<Person> hs=new HashSet<Person>();
        hs.add(new Person("Hi"));
        hs.add(new Person("Hi"));
        hs.add(new Person("Hi"));
        hs.add(new Person("Hi"));

        System.out.println("Elements"+hs.size());
    }
}
 
The size of the Hashset is given as 4. But doesn't it need to be 1? Since the equals method has implemented, can the HashSet contain multiple Person objects with the same name?
 
Do all the Person objects have the same hashcode as the hashCode method is not overridden? 

原文：https://stackoverflow.com/questions/27664261