20165337岳源第十周课上补做

Posted 2020-11-03 y963976867

课上补做-2

要求：针对下面的Student类，使用Comparator编程完成以下功能：

1. 在测试类StudentTest中新建学生列表，包括自己和学号前后各两名学生，共5名学生,给出运行结果（排序前，排序后）
2. 对这5名同学分别用学号和总成绩进行增序排序，提交两个Comparator的代码
3. 课下提交代码到码云
   

import java.util.Comparator;
public class IDComparator implements Comparator {
@Override
public int compare(Object o1, Object o2) {
Student st1 = (Student)o1;
Student st2 = (Student)o2;
return (Integer.parseInt(st1.getId())-Integer.parseInt(st2.getId()));
}
}

import java.util.Comparator;
public class scoreComparator implements Comparator {
@Override
public int compare(Object o1, Object o2) {
Student st1 = (Student)o1;
Student st2 = (Student)o2;
return (int) (st1.getTotalScore()-st2.getTotalScore());
}
}

课后习题

代码上传

https://gitee.com/BESTI-IS-JAVA-2018/20165337/tree/master/week10buzuo