集合框架(HashSet存储自定义对象)

往hashSet集合中存入自定义对象

姓名和年龄相同为同一个人，重复元素

import java.util.*;
 
class HashSetTest
{
    public static void sop(Object obj)
    {
        System.out.println(obj);
    }
    public static void main(String[] args)
    {
        HashSet hs = new HashSet();
         
        hs.add(new Person("a1",11));
        hs.add(new Person("a2",12));
        hs.add(new Person("a3",13));
        hs.add(new Person("a4",14));
        hs.add(new Person("a2",12));
         
        Iterator it = hs.iterator();
         
        while(it.hasNext())
        {
            Person p = (Person)it.next();
            sop(p.getName()+"::"+p.getAge());
        }
    }
}
 
class Person
{
    private String name;
    private int age;
    Person(String name,int age)
    {
        this.name = name;
        this.age = age;
    }  
    public int hashCode()
    {
        System.out.println(this.name+"....hashCode");
        return name.hashCode()+age;
        // return 60;
    }
    public boolean equals(Object obj)
    {
        if(!(obj instanceof Person))
            return false;
         
        Person p = (Person)obj;
        System.out.println(this.name+"...equals..."+p.name);
         
        return this.name.equals(p.name) && this.age == p.age;
    }
    public String getName()
    {
        return name;
    }
    public int getAge()
    {
        return age;
    }
}