怎么让这个按学号的大小排前后顺序
public class Main { // 主函数 public static void main(String[] args) { Student[] stu = new Student[]{ new Ben("张三", 19, 002, "本科生"), new Zuan("李四", 18, 003, "专科生"), new Yan("Sun", 22, 001, "研究生") }; for (int i = 0; i < stu.length; i++) { stu[i].study(); } } }