Java集合排序练习3-5，烦请老师检查并指正～

package com.imooc.array.comparator;

public class Student {
		private int stuId;
		private String name;
		private int age;

		public Student() {
		}

		public Student(int stuId, String name, int age) {
			this.setStuId(stuId);
			this.setName(name);
			this.setAge(age);
		}

		public int getStuId() {
			return stuId;
		}

		public void setStuId(int stuId) {
			this.stuId = stuId;
		}

		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;
		}

		@Override
		public String toString() {
			return "Student [stuId=" + stuId + ", name=" + name + ", age=" + age + "]";
		}



}

​package com.imooc.array.comparator;

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

public class TestStudent implements Comparator <Student> {

	public static void main(String[] args) {
		Student stu1 = new Student(40, "Peter", 20);
		Student stu2 = new Student(28, "Angel", 19);
		Student stu3 = new Student(35, "Tom", 18);
		List <Student> list = new ArrayList <Student> ();
		list.add(stu1);
		list.add(stu2);
		list.add(stu3);
		System.out.println("Before:");
		for(Student stu: list) {
			System.out.println(stu);
		}
		System.out.println("After:");
		Collections.sort(list, new TestStudent());
		for(Student stu: list) {
			System.out.println(stu);
		}



	}

	@Override
	public int compare(Student o1, Student o2) {
		String name1 = o1.getName();
		String name2 = o2.getName();
		int n = name1.compareTo(name2);
		return n;
	}

}