在java中按多个字段对列表进行排序(而不是比较)

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

class Student {
    private int age;
    private String name;

    public Student(int age, String name) {
        this.age = age;
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public String getName() {
        return name;
    }
}

class StudentComparator implements Comparator<Student> {
    @Override
    public int compare(Student s1, Student s2) {
        // 先按年龄升序排序
        int ageComparison = Integer.compare(s1.getAge(), s2.getAge());
        if (ageComparison != 0) {
            return ageComparison;
        }
        
        // 年龄相同则按姓名升序排序
        return s1.getName().compareTo(s2.getName());
    }
}

public class Main {
    public static void main(String[] args) {
        List<Student> students = new ArrayList<>();
        students.add(new Student(20, "Alice"));
        students.add(new Student(18, "Bob"));
        students.add(new Student(20, "Charlie"));
        
        // 按照年龄和姓名排序
        Collections.sort(students, new StudentComparator());
        
        for (Student student : students) {
            System.out.println(student.getAge() + " " + student.getName());
        }
    }
}

18 Bob
20 Alice
20 Charlie