覆盖Java中的equals（）和hashCode

Question

我正在学习equals（）和hashCode（）方法，我认为这2个方法将帮助我们了解2个对象何时相等。但是下面的代码告诉我这是不正确的。

用户类别：

public class User {
    private String name;
    private int age;
    private String passport;

    public User(String name, int age, String passport) {
        super();
        this.name = name;
        this.age = age;
        this.passport = passport;
    }

    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;
    }

    public String getPassport() {
        return passport;
    }

    public void setPassport(String passport) {
        this.passport = passport;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + age;
        result = prime * result + ((name == null) ? 0 : name.hashCode());
        result = prime * result + ((passport == null) ? 0 : passport.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        User other = (User) obj;
        if (age != other.age)
            return false;
        if (name == null) {
            if (other.name != null)
                return false;
        } else if (!name.equals(other.name))
            return false;
        if (passport == null) {
            if (other.passport != null)
                return false;
        } else if (!passport.equals(other.passport))
            return false;
        return true;
    }
}

主类：

import java.util.ArrayList;
import java.util.List;

public class App {

    public static void main(String[] args) {
        User user1 = new User("mkyong", 35, "111222333");
        User user2 = new User("mkyong", 35, "111222333");

        List<User> users = new ArrayList<>();
        users.add(user1);
        users.add(user2);

        System.out.println("user1 = " + user1); 
        System.out.println("user2 = " + user2); 

        System.out.println("user1 = " + user1.hashCode());
        System.out.println("user2 = " + user2.hashCode()); 

        System.out.println(user1.equals(user2)); 
        System.out.println(user1 == user2); 

        User user = new User("mkyong", 35, "111222333");

        System.out.println("Arraylist size = " + users.size());
        System.out.println("Arraylist contains user = " + users.contains(user));
    }
}

这是控制台中的输出：

user1 = arraylist.User@feea8b67
user2 = arraylist.User@feea8b67
user1 = -18183321
user2 = -18183321
true
false
Arraylist size = 2
Arraylist contains user = true

所以我看到用户具有相同的hashCode 18183321和相同的内存地址arraylist.User@feea8b67。而且我不明白为什么user1 == user2为假。