代码不知道哪里有问题，出现了死循环，求大神帮看看！

Question

import java.util.*;
class Person
{
private String name;
private int age;
Person(String name,int age){
this.name=name;
this.age=age;
}
public String getName(){
return this.name;
}
public int getAge(){
return this.age;
}
public int hashCode(){
System.out.println(this.name+".....hashCode");
return this.hashCode()+this.age*7;
}
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;
}

}
class HashSetDemo
{

public static void sop(Object obj){
    System.out.println(obj);
}
public static void main(String[] args) 
{
    HashSet hs=new HashSet();
    Iterator it=hs.iterator();
    hs.add(new Person("张三",18));
    hs.add(new Person("李四",17));
    hs.add(new Person("张三",18));
    hs.add(new Person("王五",19));

    sop(hs.contains(new Person("张三",18)));
    sop(hs.remove(new Person("张三",18)));
    while(it.hasNext()){
        Person p=(Person)it.next();
        System.out.println(p.getName()+"---"+p.getAge());
    }
}

}

Answer 1

请查看自己的Person class中的hashCode方法，方法中又调用了this的hashCode，反复递归调用。所以会死循环。