java在不同对象中的属性比较

public class Person {
    private String name;
    private int age;

    // 构造方法和其他方法省略

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null || getClass() != obj.getClass()) {
            return false;
        }
        Person person = (Person) obj;
        return age == person.age && Objects.equals(name, person.name);
    }
}

public class Person implements Comparable<Person> {
    private String name;
    private int age;

    // 构造方法和其他方法省略

    @Override
    public int compareTo(Person person) {
        int result = name.compareTo(person.name);
        if (result == 0) {
            result = Integer.compare(age, person.age);
        }
        return result;
    }
}

public class PersonComparator implements Comparator<Person> {
    @Override
    public int compare(Person person1, Person person2) {
        int result = person1.getName().compareTo(person2.getName());
        if (result == 0) {
            result = Integer.compare(person1.getAge(), person2.getAge());
        }
        return result;
    }
}