I‘am HeyHex

代码如下import java.util.Random;public class Exam { public static void main(String[] args) { Random r = new Random(); NotifyListener nl = new MyNotify(); //创建计时线程 Thread t = new CountTime(200,nl); t.start()

实现了存储学生对象的班级、学号、姓名与年龄public class StudentManagement { public static void main(String[] args) throws IOException, ClassNotFoundException { Scanner sc = new Scanner(System.in); System.out.println("========================="); S