单选题 下列代码的输出结果是______________?import java.util.*;public class Test { public static void main(String[] args) { ArrayList<Student> list = new ArrayList<>(); list.add(new Student("Peter", 65)); list.add(new Student("Jill", 50)); list.add(new Student("Sarah", 34)); Collections.sort(list); System.out.print(list + " "); Collections.sort(list, new StudentComparator1()); System.out.println(list); } static class StudentComparator1 implements Comparator<Student> { public int compare(Student s1, Student s2) { return s1.name.compareTo(s2.name); } } static class Student implements Comparable<Student> { String name; int age; Student(String name, int age) { this.name = name; this.age = age; } public int compareTo(Student s) { return this.age - s.age; } public String toString() { return "[" + name + ", " + age + "]"; } }}