要求：
①从数组遍历所有内容解析为学生对象，将学生在存于一个新的List集合
②遍历集合找出”优秀”的学生信息（优秀：成绩>=80）
③找出集合中没有参加考试的学生信息（成绩为null）
④制定成绩光荣榜（成绩从高到低打印学生成绩）
import java.util.*;
/**
* @author Spring-_-Bear
* @version 2021-10-31 11:45
*/
public class Main {
public static void main(String[] args) {
List<Student> students = new ArrayList<>(5);
Scanner scanner = new Scanner(System.in);
for (int i = 0; i < 5; i++) {
String str = scanner.next();
students.add(change(str));
}
List<Student> list = new ArrayList<>(students);
ArrayList<Double> score = new ArrayList<>();
for (Student s : list) {
if (s.getScore() == null) {
System.out.println(s);
} else {
score.add(s.getScore());
}
}
score.sort(((o1, o2) -> o2.compareTo(o1)));
for (Double s : score) {
System.out.println(s);
}
}
public static Student change(String str) {
Student student = new Student();
String[] split = str.split("/");
student.setName(split[0]);
student.setAge(Integer.parseInt(split[1]));
student.setSex(split[2]);
if (split.length < 4) {
return student;
}
student.setScore(Double.parseDouble(split[3]));
return student;
}
}