526互联

blog-3

发布时间 2023-12-09 23:21:46作者: 不做任何人的影子

题目描述

编辑

输入多个学生的成绩信息，包括：学号、姓名、数学成绩、物理成绩。

学号是每个学生的唯一识别号，互不相同。

姓名可能会存在重复。

要求：使用ArrayList存储学生信息。

输入格式:

输入多个学生的成绩信息，每个学生的成绩信息格式：学号+英文空格+姓名+英文空格+数学成绩+英文空格+物理成绩

以“end”为输入结束标志

输出格式:

按数学/物理成绩之和从高到低的顺序输出所有学生信息，每个学生信息的输出格式：学号+英文空格+姓名+英文空格+数学/物理成绩之和

成绩相同的情况，按输入的先后顺序输出。

import java.util.*;

public class Main {
 public static void main(String[] args) {
  Scanner sc = new Scanner(System.in);
  List<Student> list = new ArrayList<>();
  String line = sc.nextLine();
  while (!line.equals("end")){
   String[] words = line .split(" ");
   Student stu =new Student(words[0],words[1], Integer.parseInt(words[2]),Integer.parseInt(words[3]) );
   list.add(stu);
   line= sc.nextLine();
  }
  Collections.sort(list, new Comparator<Student>() {
   @Override
   public int compare(Student o1, Student o2) {
    int score1 = o1.getMathScore() + o1.getPhysScore();
    int score2 = o2.getMathScore() + o2.getPhysScore();
    if (score2 != score1) {
     return score2 -score1;
    } else {
     return list.indexOf(o1) - list.indexOf(o2);
    }
   }
  });
  for(Student stu:list){
   int sum = stu.getMathScore()+ stu.getPhysScore();
   System.out.println(stu.getId()+" "+stu.getName()+" "+sum);
  }



 }
}
class Student{
 private String id;
 private String name;
 private int mathScore;
 private int physScore;

 public Student(String id, String name, int mathScore, int physScore){
  this.id = id;
  this.name = name;
  this.mathScore = mathScore;
  this.physScore = physScore;
 }

 public String getId(){
  return this.id;
 }

 public String getName(){
  return this.name;
 }

 public int getMathScore(){
  return this.mathScore;
 }

 public int getPhysScore(){
  return this.physScore;
 }
}


class Elephant {

    private String name; // 名称
    private int age; // 年龄
    private String color; // 颜色
    private int weight; // 体重，单位 kg
    private boolean hasTusks; // 是否有象牙

    /**
     * 构造函数
     */
    public Elephant(String name, int age, String color, int weight, boolean hasTusks) {
        this.name = name;
        this.age = age;
        this.color = color;
        this.weight = weight;
        this.hasTusks = hasTusks;
    }

    void eat() {
        System.out.println(name + " is eating.");
    }

    public void sleep() {
        System.out.println(name + " is sleeping.");
    }

    public void trumpeting() {
        System.out.println(name + " is trumpeting.");
    }

    public void takeBath() {
        System.out.println(name + " is taking a bath.");
    }

    public void walk() {
        System.out.println(name + " is walking.");
    }

    public void squirtWater() {
        System.out.println(name + " is squinting water.");
    }

    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;
    }

    public String getColor() {
        return color;
    }

    public void setColor(String color) {
        this.color = color;
    }

    public int getWeight() {
        return weight;
    }

    public void setWeight(int weight) {
        this.weight = weight;
    }

    public boolean isHasTusks() {
        return hasTusks;
    }

    public void setHasTusks(boolean hasTusks) {
        this.hasTusks = hasTusks;
    }
}



class Elephant1 {

    private String name; // 名称
    private int age; // 年龄
    private String color; // 颜色
    private int weight; // 体重，单位 kg
    private boolean hasTusks; // 是否有象牙


    public Elephant1(String name, int age, String color, int weight, boolean hasTusks) {
        this.name = name;
        this.age = age;
        this.color = color;
        this.weight = weight;
        this.hasTusks = hasTusks;
    }

    public void eat() {
        System.out.println(name + " is eating.");
    }

    public void sleep() {
        System.out.println(name + " is sleeping.");
    }


    public void trumpeting() {
        System.out.println(name + " is trumpeting.");
    }


    public void takeBath() {
        System.out.println(name + " is taking a bath.");
    }

    /**
     * 行走
     */
    public void walk() {
        System.out.println(name + " is walking.");
    }

    /**
     * 喷水
     */
    public void squirtWater() {
        System.out.println(name + " is squinting water.");
    }

    /**
     * 获取名称
     */
    public String getName() {
        return name;
    }

    /**
     * 设置名称
     */
    public void setName(String name) {
        this.name = name;
    }

    /**
     * 获取年龄
     */
    public int getAge() {
        return age;
    }

    /**
     * 设置年龄
     */
    public void setAge(int age) {
        this.age = age;
    }

    /**
     * 获取颜色
     */

}

　　

 

 

课程成绩统计程序-3在第二次的基础上修改了计算总成绩的方式，

要求：修改类结构，将成绩类的继承关系改为组合关系，成绩信息由课程成绩类和分项成绩类组成，课程成绩类组合分项成绩类，分项成绩类由成绩分值和权重两个属性构成。

完成课程成绩统计程序-2、3两次程序后，比较继承和组合关系的区别。思考一下哪一种关系运用上更灵活，更能够适应变更。

题目最后的参考类图未做修改，大家根据要求自行调整，以下内容加粗字体显示的内容为本次新增的内容。

某高校课程从性质上分为：必修课、选修课、实验课，从考核方式上分为：考试、考察、实验。

考试的总成绩由平时成绩、期末成绩分别乘以权重值得出，比如平时成绩权重0.3，期末成绩权重0.7，总成绩=平时成绩*0.3+期末成绩*0.7。

考察的总成绩直接等于期末成绩

实验的总成绩等于课程每次实验成绩乘以权重后累加而得。

课程权重值在录入课程信息时输入。（注意：所有分项成绩的权重之和应当等于1）

必修课的考核方式必须为考试，选修课可以选择考试、考察任一考核方式。实验课的成绩必须为实验。

1、输入：

包括课程、课程成绩两类信息。

课程信息包括：课程名称、课程性质、考核方式、分项成绩数量、每个分项成绩的权重。

考试课信息格式：课程名称+英文空格+课程性质+英文空格+考核方式+英文空格+平时成绩的权重+英文空格+期末成绩的权重

考察课信息格式：课程名称+英文空格+课程性质+英文空格+考核方式

实验课程信息格式：课程名称+英文空格+课程性质+英文空格+考核方式+英文空格+分项成绩数量n+英文空格+分项成绩1的权重+英文空格+。。。+英文空格+分项成绩n的权重

实验次数至少4次，不超过9次

课程性质输入项：必修、选修、实验

考核方式输入选项：考试、考察、实验

考试/考查课程成绩信息包括：学号、姓名、课程名称、平时成绩（可选）、期末成绩

考试/考查课程成绩信息格式：学号+英文空格+姓名+英文空格+课程名称+英文空格+平时成绩+英文空格+期末成绩

实验课程成绩信息包括：学号、姓名、课程名称、每次成绩｛在系列-2的基础上去掉了（实验次数），实验次数要和实验课程信息中输入的分项成绩数量保持一致｝

实验课程信息格式：学号+英文空格+姓名+英文空格+课程名称+英文空格+第一次实验成绩+...+英文空格+最后一次实验成绩

以上信息的相关约束：

1）成绩是整数，不包含小数部分，成绩的取值范围是【0,100】

2）学号由8位数字组成

3）姓名不超过10个字符

4）课程名称不超过10个字符

5）不特别输入班级信息，班级号是学号的前6位。

2、输出：

输出包含三个部分，包括学生所有课程总成绩的平均分、单门课程总成绩平均分、班级所有课程总成绩平均分。

为避免四舍五入误差，

计算单个成绩时，分项成绩乘以权重后要保留小数位，计算总成绩时，累加所有分项成绩的权重分以后，再去掉小数位。

学生总成绩/整个班/课程平均分的计算方法为累加所有符合条件的单个成绩，最后除以总数。

1）学生课程总成绩平均分按学号由低到高排序输出

格式：学号+英文空格+姓名+英文空格+总成绩平均分

如果某个学生没有任何成绩信息，输出：学号+英文空格+姓名+英文空格+"did not take any exams"

2）单门课程成绩按课程名称的字符顺序输出

课程成绩输出格式：课程名称+英文空格+总成绩平均分

如果某门课程没有任何成绩信息，输出：课程名称+英文空格+"has no grades yet"

3）班级所有课程总成绩平均分按班级由低到高排序输出

格式：班级号+英文空格+总成绩平均分

如果某个班级没有任何成绩信息，输出：班级名称+英文空格+ "has no grades yet"

异常情况：

1）如果解析某个成绩信息时，课程名称不在已输入的课程列表中，输出：学号+英文空格+姓名+英文空格+":"+课程名称+英文空格+"does not exist"

2）如果解析某个成绩信息时，输入的成绩数量和课程的考核方式不匹配，输出：学号+英文空格+姓名+英文空格+": access mode mismatch"

以上两种情况如果同时出现，按第一种情况输出结果。

3）如果解析某个课程信息时，输入的课程性质和课程的考核方式不匹配，输出：课程名称+" : course type & access mode mismatch"

4）格式错误以及其他信息异常如成绩超出范围等，均按格式错误处理，输出"wrong format"

5）若出现重复的课程/成绩信息，只保留第一个课程信息，忽略后面输入的。

6）如果解析实验课程信息时，输入的分项成绩数量值和分项成绩权重的个数不匹配，输出：课程名称+" : number of scores does not match"

7）如果解析考试课、实验课时，分项成绩权重值的总和不等于1，输出：课程名称+" : weight value error"

 

import java.util.*;
import java.text.*;
class Calculate_grades {
    int stu_all_grades(Data_storage data_storage,String num){//单个学生总课程平均分计算  返回一个分数 1)
        int count =0;//这个学生有几门课
        int sum = 0;
        for (Map.Entry<String, Score> entry : data_storage.stu__st_cour.get(num).gradeMap.entrySet()) {
            Score value = entry.getValue();
            if(Integer.parseInt(value.total_scores)>=0) {
                count++;
                sum += Integer.parseInt(value.total_scores);
            }
        }
        if(count!=0)
            return sum/count;
        else
            return -100;//没有参加任何考试
    }
    int[] single_course_grades(Data_storage data_storage,String name){ //2) 课程名
        int count = 0;
        int[] aver_grade = new int[3];//0：平时成绩 1：期末考试 2：总分平均
        for (Map.Entry<String, StudentsAll_mes> e : data_storage.stu__st_cour.entrySet()) {//遍历选课类:num-选课类
            StudentsAll_mes value = e.getValue();
            for (Map.Entry<String, Score> entry : value.gradeMap.entrySet()) {//遍历选课类:course.name-Score
                String key1 = entry.getKey();
                Score value1 = entry.getValue();
                if (key1.equals(name)) {
                    if(Integer.parseInt(value1.total_scores)>=0) {//总分为- 说明算成绩无效
                        count++;
                        aver_grade[2] += Integer.parseInt(value1.total_scores);
                        if (value1 instanceof Test_Score) {
                            if (Integer.parseInt(value1.total_scores) >= 0) {
                                aver_grade[0] += Integer.parseInt(((Test_Score) value1).normal_score);
                                aver_grade[1] += Integer.parseInt(((Test_Score) value1).end_score);
                            }
                        } else if (value1 instanceof Inspect_Score){
                            if (Integer.parseInt(value1.total_scores) >= 0) {
                                aver_grade[0] = -100;//不需要平时成绩
                                aver_grade[1] += Integer.parseInt(((Inspect_Score) value1).end_score);
                            }
                        }else if(value1 instanceof Lab_Score){
                            if(Integer.parseInt(value1.total_scores)>=0){
                                aver_grade[0] = -100;
                                aver_grade[1] += aver_grade[1] += Integer.parseInt(value1.total_scores);
                            }
                        }
                    }
                }
            }
        }
        if(count!=0) {
            for (int i = 0; i < 3; i++) {
                aver_grade[i] = aver_grade[i] / count;
            }
        }else {
            for (int i = 0; i < 3; i++) {
                aver_grade[i] = -100;
            }
        }
        return aver_grade;
    }
    int Class_grades(Data_storage data_storage,String num){//3)
        int sum = 0;
        int count = 0;
        for (Map.Entry<String, Student> mapEntry : data_storage.classes.get(num).students.entrySet()) {//班级号-Student类
            Student value = mapEntry.getValue();//遍历这个班级的所有学生
            for (Map.Entry<String, StudentsAll_mes> e : data_storage.stu__st_cour.entrySet()) {//stu_num-选课类
                String key1 = e.getKey();//遍历学生的选课类 学号
                StudentsAll_mes value1 = e.getValue();
                if (key1.equals(value.num)) {//选课类中 跟输入的学号一样
                    for (Map.Entry<String, Score> entry : value1.gradeMap.entrySet()) {//该num所有成绩遍历
                        Score gra = entry.getValue();
                        if(Integer.parseInt(gra.total_scores)>=0) {//有效才算
                            sum += Integer.parseInt(gra.total_scores);
                            count++;
                        }
                    }
                }
            }
        }
        if(count!=0)
            return sum/count;
        else
            return -100;
    }
    void final_score(Data_storage data_storage,String num){//计算没门课的成绩 学号
        data_storage.stu__st_cour.get(num).gradeMap.forEach((key,value)->{//学号  成绩
            if(value instanceof Test_Score&&((Test_Score) value).normal_score.matches("\\d+")&&((Test_Score) value).end_score.matches("\\d+")) {
                double tem = ((Test_Course) data_storage.courses.get(key)).normal_weight*Integer.parseInt(((Test_Score) value).normal_score);
                double tem1 = ((Test_Course) data_storage.courses.get(key)).end_weight*Integer.parseInt(((Test_Score) value).end_score);
                value.total_scores = String.valueOf((int)(tem+tem1));
            }else if(value instanceof Inspect_Score&&((Inspect_Score) value).end_score.matches("\\d+")){
                value.total_scores = ((Inspect_Score) value).end_score;
            }else if(value instanceof Lab_Score&&((Lab_Score) value).lab_num.matches("\\d+")){
                float sum = 0;
                int i=0;
                for (Integer score : ((Lab_Score) value).scores) {
                    sum+= score* ((Lab_Course) data_storage.courses.get(key)).weights.get(i);
                    i++;
                }
                value.total_scores = String.valueOf((int)sum);
            }
        });
    }
}
class Class {
    String num;
    TreeMap<String, Student> students = new TreeMap<>(); //班级里的学生 学号 学生
    Class(String num){
        this.num = num;
    }
}
class Course {
    String type;
    String test_way;
    String name;
    Course(String name,String type, String test_way){
        this.type = type;
        this.name = name;
        this.test_way = test_way;
    }
}
class Inspect_Course extends Course{
    Inspect_Course(String name, String type, String test_way) {
        super(name, type, test_way);
    }
}
class Test_Course extends Course{
    double normal_weight;
    double end_weight;

    Test_Course(String name, String type, String test_way,String normal_weight,String end_weight) {
        super(name, type, test_way);
        this.normal_weight = Float.parseFloat(normal_weight);
        this.end_weight = Float.parseFloat(end_weight);
    }
}
class Lab_Course extends Course{
    int sub_scores_num;
    ArrayList<Float> weights = new ArrayList<>();
    Lab_Course(String name, String type, String test_way,String line) {
        super(name, type, test_way);
        String[] lines = line.split(" ");
        sub_scores_num = Integer.parseInt(lines[3]);
        for(int i=4;i<lines.length; i++){
            weights.add(Float.parseFloat(lines[i]));
        }
    }
}
class Data_storage {
    TreeMap<String , Course> courses;//课程  k：课程名 v:课程
    TreeMap<String, Class> classes = new TreeMap<>();//班级 k:班级号V:班级
    TreeMap<String, StudentsAll_mes> stu__st_cour;//选课类学生类结合 k:学号 v:选课类
    InAndOut_put output = new InAndOut_put();
    Data_storage(){
        //学生和选课类结合
        stu__st_cour = new TreeMap<>(Data_storage::compare);//重写排序
        courses = new TreeMap<>(Data_storage::compare);
    }

    private static int compare(String o1, String o2) {

        try {
            Comparator<Object> comparator = Collator.getInstance(Locale.CHINA);
            if (comparator.compare(o1, o2) < 0) {
                return -1;
            } else if (comparator.compare(o1, o2) > 0) {
                return 1;
            }
        } catch (Exception ignored) {
        }
        return 0;
    }

    void setInspectCourses(String name, String type, String test_way){
        if(!courses.containsKey(name)) {
            courses.put(name, new Inspect_Course(name, type, test_way));
        }
    }
    void setTestCourses(String name, String type, String test_way,String normal_weight, String end_weight){
        if(!courses.containsKey(name)) {
            courses.put(name, new Test_Course(name, type, test_way,normal_weight, end_weight));
        }
    }
    void setLabCourses(String name, String type, String test_way,String line){
        if(!courses.containsKey(name)) {
            courses.put(name, new Lab_Course(name, type, test_way,line));
        }
    }
    void setClasses(String num){
        if(!classes.containsKey(num)) {
            classes.put(num, new Class(num));
        }
    }
    void setStudents(String clas_num, String name, String num){//班级号 姓名 学号
        if(classes.containsKey(clas_num)){
            if(!classes.get(clas_num).students.containsKey(num))
                classes.get(clas_num).students.put(num,new Student(name,num));
        }
    }
    void setStu__st_courAndMap(String num,String course,String normal_score,String end_score){//添加选课类  学生姓名 课程名称 分数
        if(!stu__st_cour.containsKey(num)){
            stu__st_cour.put(num,new StudentsAll_mes(num,course,normal_score,end_score));
        }
        else{
            stu__st_cour.get(num).setGradeMap(course,normal_score,end_score);
        }
    }
    void setStu__st_courAndMap(String num,String course,String end_score){
        if(!stu__st_cour.containsKey(num)){
            stu__st_cour.put(num,new StudentsAll_mes(num,course,end_score));
        }
        else{
            stu__st_cour.get(num).setGradeMap(course,end_score);
        }
    }
    void set_lab_grades(String stu_num,String course,String lab_num,String grades){
        ArrayList<Integer> scores = new ArrayList<>();
        String[] tem = grades.split(" ");
        for(int i=3;i<tem.length;i++){
            if(tem[i].matches("\\d+"))
                scores.add(Integer.parseInt(tem[i]));
        }
        if(!stu__st_cour.containsKey(stu_num)){
            StudentsAll_mes tem_stu_mes = new StudentsAll_mes();
            tem_stu_mes.set_lab_stu_mes(stu_num,course,lab_num,scores);
            stu__st_cour.put(stu_num,tem_stu_mes);
        }else{
            stu__st_cour.get(stu_num).set_lab_gradeMap(course,lab_num,scores);
        }
    }
}
class Input_Format {
    String regex_c_test = "^[\\u4e00-\\u9fa5a-zA-Z0-9]{1,10}\\s(必修|选修)\\s考试\\s((0.\\d{1,2})|(1-9?))\\s((0.\\d{1,2})|(1-9?))$";
    String regex_c_inspect = "[\\u4e00-\\u9fa5a-zA-Z0-9]{1,10}\\s选修\\s考察$";
    String regex_c_lab = "^[\\u4e00-\\u9fa5a-zA-Z0-9 ]{1,10}\\s实验\\s实验\\s[4-9]\\s((0.\\d{1,2})|(1-9?))(\\s((0.\\d{1,2})|(1-9?))){3,9}$";
    String regex_CS = "^\\d{8}\\s+[\\u4e00-\\u9fa5a-zA-Z0-9]{1,10}\\s+[\\u4E00-\\u9FA5A-Za-z0-9]{1,10}\\s*((100)|(\\d{1,2})|(0))?\\s+((100)|(\\d{1,2})|(0))$";
    String regex_lab = "^\\d{8}\\s[\\u4e00-\\u9fa5a-zA-Z0-9]{1,10}\\s[\\u4e00-\\u9fa5a-zA-Z0-9 ]{1,10}\\s((100)|([1-9]\\d)|\\d)(\\s((100)|([1-9]\\d)|\\d)){2,9}$";
    boolean isEnd = true;//结束标志
    String[] strings;
    void inputProcessing(String line,Data_storage data_storage) {
        lineProcessing(line);//分割
        data_storage.output.add_input(line);//存储
        if(line.matches(regex_c_inspect)){
            data_storage.setInspectCourses(strings[0],strings[1],strings[2]);
        }else if(line.matches(regex_c_lab)){
            data_storage.setLabCourses(strings[0],strings[1],strings[2],line);
        }else if(line.matches(regex_c_test)){
            data_storage.setTestCourses(strings[0],strings[1],strings[2],strings[3],strings[4]);//成绩信息
        } else if(line.matches(regex_CS)||line.matches(regex_lab)){
            data_storage.setClasses(strings[0].substring(0,6));
            data_storage.setStudents(strings[0].substring(0, 6), strings[1], strings[0]);//学生的添加
            if (data_storage.courses.containsKey(strings[2])) {//课程里有这个课
                if (data_storage.courses.get(strings[2]).type.equals("选修")) {//
                    if (data_storage.courses.get(strings[2]).test_way.equals("考试")&&strings.length == 5) {
                        data_storage.setStu__st_courAndMap(strings[0], strings[2], strings[3], strings[4]);
                    }else if(data_storage.courses.get(strings[2]).test_way.equals("考察")&&strings.length==4){
                        data_storage.setStu__st_courAndMap(strings[0], strings[2], strings[3]);
                    } else {
                        data_storage.setStu__st_courAndMap(strings[0], strings[2], "no access", "no access");
                    }
                } else if (data_storage.courses.get(strings[2]).type.equals("必修")) {//
                    if (strings.length == 5) {
                        data_storage.setStu__st_courAndMap(strings[0], strings[2], strings[3],strings[4]);
                    } else {//无效
                        data_storage.setStu__st_courAndMap(strings[0], strings[2], "no access", "no access");
                    }
                } else if(data_storage.courses.get(strings[2]).type.equals("实验")){
                    if(strings.length == 3+((Lab_Course) data_storage.courses.get(strings[2])).sub_scores_num){
                        data_storage.set_lab_grades(strings[0],strings[2], String.valueOf(((Lab_Course) data_storage.courses.get(strings[2])).sub_scores_num),line);
                    }else{
                        data_storage.set_lab_grades(strings[0],strings[2],"num error","no access");
                    }
                }
            }else{
                data_storage.setStu__st_courAndMap(strings[0], strings[2], "not exist");
            }
        }
    }
    void lineProcessing(String line){
        strings = line.split(" ");
    }
}
class Inspect_Score extends Score{
    String end_score;
    Inspect_Score(String end_score) {
        this.end_score = end_score;
    }
}
class  Output_Format {
    Calculate_grades calculate = new Calculate_grades();
    String regex_c_test = "^[\\u4e00-\\u9fa5a-zA-Z0-9]{1,10}\\s(必修|选修|实验)\\s(考试|考察|实验)\\s((\\d{1,2})|(1-9?))\\s((\\d{1,2})|(1-9?))$";
    String regex_c_test_e = "^[\\u4e00-\\u9fa5a-zA-Z0-9]{1,10}\\s(必修|选修|实验)\\s(考试|考察|实验)\\s((0.\\d{1,2})|(1-9?))\\s((0.\\d{1,2})|(1-9?))$";
    String regex_c_inspect = "[\\u4e00-\\u9fa5a-zA-Z0-9]{1,10}\\s(必修|选修|实验)\\s(考试|考察|实验)$";
    String regex_c_lab = "^[\\u4e00-\\u9fa5a-zA-Z0-9]{1,10}\\s(必修|选修|实验)\\s(考试|考察|实验)\\s[4-9]\\s((0.\\d{1,2})|(1-9?))(\\s((0.\\d{1,2})|(1-9?))){1,10}$";
    String regex_CS = "^\\d{8}\\s+[\\u4e00-\\u9fa5a-zA-Z0-9]{1,10}\\s+[\\u4e00-\\u9fa5a-zA-Z0-9]{1,10}\\s*((100)|(\\d{1,2})|(0))?\\s+((100)|(\\d{1,2})|(0))$";
    String regex_lab = "^\\d{8}\\s[\\u4e00-\\u9fa5a-zA-Z0-9]{1,10}\\s[\\u4e00-\\u9fa5a-zA-Z0-9]{1,10}\\s((100)|([1-9]\\d)|\\d)(\\s((100)|([1-9]\\d)|\\d)){1,20}$";
    void outputProcessing(Data_storage data) {
        data.classes.forEach((num,Class)-> Class.students.forEach((name, student)-> calculate.final_score(data,student.num)));
        for(String i:data.output.input){
            String[] tem = i.split(" ");
            if(i.matches(regex_c_test_e)||i.matches(regex_c_test)||i.matches(regex_c_inspect)||i.matches(regex_c_lab)){
                if(tem[1].equals("必修")&&(tem[2].equals("考察")||tem[2].equals("实验"))){
                    data.output.add_output(tem[0] + " : course type & access mode mismatch");
                }else if(tem[1].equals("实验")&&!tem[2].equals("实验")) {
                    data.output.add_output(tem[0] + " : course type & access mode mismatch");
                }else if(tem[1].equals("选修")&&tem[2].equals("实验")) {
                    data.output.add_output(tem[0] + " : course type & access mode mismatch");
                }
                if(tem[1].equals("实验")&&tem[2].equals("实验")) {
                    if(tem.length-4>=4&&tem.length - 4<=9) {
                        if (Integer.parseInt(tem[3]) != tem.length - 4) {
                            data.output.add_output(tem[0] + " : number of scores does not match");
                            data.courses.remove(tem[0]);
                            continue;
                        }
                        float tem_weight = 0;
                        for (int j = 4; j < tem.length; j++) {
                            tem_weight += Float.parseFloat(tem[j]);
                        }
                        if (Math.abs(tem_weight - 1) > 0.0001) {
                            data.output.add_output(tem[0] + " : weight value error");
                            data.courses.remove(tem[0]);
                            continue;
                        }
                    }else{
                        try {
                            if (Integer.parseInt(tem[3]) != tem.length - 4) {
                                data.output.add_output(tem[0] + " : number of scores does not match");
                                data.courses.remove(tem[0]);
                                continue;
                            }
                        } catch (Exception ignored) {

                        }
                    }
                }if((tem[1].equals("必修")||tem[1].equals("选修"))&&tem[2].equals("考试")){
                    if(tem.length-3==2) {
                        float tem_weight = Float.parseFloat(tem[3]) + Float.parseFloat(tem[4]);
                        if (Math.abs(tem_weight - 1) > 0.0001) {
                            data.output.add_output(tem[0] + " : weight value error");
                            data.courses.remove(tem[0]);
                        }
                    }
                }
            }else if(i.matches(regex_CS)||i.matches(regex_lab)) {
                if(!data.courses.containsKey(tem[2])){//不存在
                    data.output.add_output(tem[2]+" does not exist");
                    data.stu__st_cour.get(tem[0]).gradeMap.remove(tem[2]);
                }else{
                    if(data.courses.get(tem[2]).type.equals("必修") && tem.length!=5) {//必修 但是只有期末成绩
                        data.output.add_output(tem[0]+" "+tem[1]+" : access mode mismatch");
                    }else if(data.courses.get(tem[2]).type.equals("选修")) {
                        if ((data.courses.get(tem[2]).test_way.equals("考试") && tem.length != 5) ||
                                (data.courses.get(tem[2]).test_way.equals("考察") && tem.length != 4))
                            data.output.add_output(tem[0] + " " + tem[1] + " : access mode mismatch");
                    }else if(data.courses.get(tem[2]).type.equals("实验")){
                        if(data.courses.get(tem[2]).test_way.equals("实验")&&(tem.length-3<4||tem.length-3>9||tem.length-3!=((Lab_Course) data.courses.get(tem[2])).sub_scores_num))
                            data.output.add_output(tem[0] + " " + tem[1] + " : access mode mismatch");
                    }
                }
            }else if(!i.equals("end")){
                data.output.add_output("wrong format");
            }
        }
        data.classes.forEach((cla_num,Class1)->{//遍历所有班级
            Class1.students.forEach((stu_num,student)->{
                int tem=calculate.stu_all_grades(data,stu_num);
                if(tem>=0)
                    data.output.add_output(stu_num+" "+Class1.students.get(stu_num).name+" "+tem);
                else
                    data.output.add_output(stu_num+" "+Class1.students.get(stu_num).name+" "+"did not take any exams");
            });
        });
        data.courses.forEach((key,value)-> {
            int[] tem = calculate.single_course_grades(data, key);
            if (tem[0] < 0 && tem[1] < 0 && tem[2] < 0) {//三个为- 则没成绩
                data.output.add_output(key + " has no grades yet");
            }else {
                if (value.type.equals("选修") || value.type.equals("必修") || value.type.equals("实验")) {
                    data.output.add_output(key + " " + tem[2]);
                }
            }
        });
        data.classes.forEach((num,Class)->{
            int tem = calculate.Class_grades(data,num);
            if(tem>=0) {
                data.output.add_output(num + " " + tem);
            }else
                data.output.add_output(num+" has no grades yet");
        });
    }
    void output_all(Data_storage data){
        data.output.output.forEach(System.out::println);
    }
}
abstract class Score {
    String total_scores = "-100";
}
class Student {
    String name;
    String num;
    Student(String name, String num) {
        this.name = name;
        this.num = num;
    }
}
class StudentsAll_mes {
    String num;//学生
    TreeMap<String,Score> gradeMap =new TreeMap<>();
    StudentsAll_mes(String stu_name, String course, String normal_score,String test_score){
        this.num = stu_name;
        gradeMap.put(course,new Test_Score(normal_score,test_score));
    }
    StudentsAll_mes(String stu_name, String course, String test_score){
        this.num = stu_name;
        gradeMap.put(course,new Inspect_Score(test_score));
    }

    public StudentsAll_mes() {

    }
    void set_lab_stu_mes(String stu_num,String course,String lab_num,ArrayList<Integer> scores){
        this.num = stu_num;
        gradeMap.put(course,new Lab_Score(lab_num,scores));
    }
    void set_lab_gradeMap(String course,String lab_num,ArrayList<Integer> scores){
        if(!gradeMap.containsKey(course))
            gradeMap.put(course,new Lab_Score(lab_num,scores));
    }
    void setGradeMap(String course, String normal_score,String test_score){
        if(!gradeMap.containsKey(course))
            gradeMap.put(course, new Test_Score(normal_score,test_score));
    }
    void setGradeMap(String course,String test_score){
        if(!gradeMap.containsKey(course))
            gradeMap.put(course,new Inspect_Score(test_score));
    }

}
class Test_Score extends Score{
    String normal_score;
    String end_score;
    Test_Score(String normal_score,String end_score) {
        this.normal_score = normal_score;
        this.end_score = end_score;
    }
}
class Lab_Score extends Score {
    String lab_num;//试验次数

    ArrayList<Integer> scores;
    Lab_Score(String lab_num,ArrayList<Integer> scores){
        this.lab_num = lab_num;
        this.scores = scores;
    }
}
class InAndOut_put {
    List<String> output = new ArrayList<>();
    List<String> input = new ArrayList<>();
    void add_output(String out){
        output.add(out);
    }
    void add_input(String out){
        input.add(out);
    }
}
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Input_Format inputFormat = new Input_Format();//输入
        Output_Format outputFormat = new Output_Format();//输出
        Data_storage data_storage = new Data_storage();
        while (inputFormat.isEnd){
            String inputLine = scanner.nextLine();
            if(inputLine.equals("end")){
                inputFormat.isEnd = false;
                break;
            }
            inputFormat.inputProcessing(inputLine,data_storage);
        }
        outputFormat.outputProcessing(data_storage);
        outputFormat.output_all(data_storage);
    }
}


class Elephant {

    private String name; // 名称
    private int age; // 年龄
    private String color; // 颜色
    private int weight; // 体重，单位 kg
    private boolean hasTusks; // 是否有象牙

    /**
     * 构造函数
     */
    public Elephant(String name, int age, String color, int weight, boolean hasTusks) {
        this.name = name;
        this.age = age;
        this.color = color;
        this.weight = weight;
        this.hasTusks = hasTusks;
    }

    void eat() {
        System.out.println(name + " is eating.");
    }

    public void sleep() {
        System.out.println(name + " is sleeping.");
    }

    public void trumpeting() {
        System.out.println(name + " is trumpeting.");
    }

    public void takeBath() {
        System.out.println(name + " is taking a bath.");
    }

    public void walk() {
        System.out.println(name + " is walking.");
    }

    public void squirtWater() {
        System.out.println(name + " is squinting water.");
    }

    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;
    }

    public String getColor() {
        return color;
    }

    public void setColor(String color) {
        this.color = color;
    }

    public int getWeight() {
        return weight;
    }

    public void setWeight(int weight) {
        this.weight = weight;
    }

    public boolean isHasTusks() {
        return hasTusks;
    }

    public void setHasTusks(boolean hasTusks) {
        this.hasTusks = hasTusks;
    }
}



class Elephant1 {

    private String name; // 名称
    private int age; // 年龄
    private String color; // 颜色
    private int weight; // 体重，单位 kg
    private boolean hasTusks; // 是否有象牙


    public Elephant1(String name, int age, String color, int weight, boolean hasTusks) {
        this.name = name;
        this.age = age;
        this.color = color;
        this.weight = weight;
        this.hasTusks = hasTusks;
    }

    public void eat() {
        System.out.println(name + " is eating.");
    }

    public void sleep() {
        System.out.println(name + " is sleeping.");
    }


    public void trumpeting() {
        System.out.println(name + " is trumpeting.");
    }


    public void takeBath() {
        System.out.println(name + " is taking a bath.");
    }

    /**
     * 行走
     */
    public void walk() {
        System.out.println(name + " is walking.");
    }

    /**
     * 喷水
     */
    public void squirtWater() {
        System.out.println(name + " is squinting water.");
    }

    /**
     * 获取名称
     */
    public String getName() {
        return name;
    }

    /**
     * 设置名称
     */
    public void setName(String name) {
        this.name = name;
    }

    /**
     * 获取年龄
     */
    public int getAge() {
        return age;
    }

    /**
     * 设置年龄
     */
    public void setAge(int age) {
        this.age = age;
    }

    /**
     * 获取颜色
     */

}
    1. 输入n，然后连续输入n个身份证号。
    2. 然后根据输入的是sort1还是sort2，执行不同的功能。输入的不是sort1或sort2，则输出exit并退出。
      输入sort1，将每个身份证的年月日抽取出来，按年-月-日格式组装，然后对组装后的年-月-日升序输出。
      输入sort2，将所有身份证按照里面的年月日升序输出。
      1. import java.util.*;

public class Main {
 public static void main(String[] args) {
  Scanner sc = new Scanner(System.in);
  int n= sc.nextInt();
  String line =sc.nextLine();

  List <String> list =new ArrayList<>();
  for(int i=0;i<n;i++){
   line =sc.nextLine();
   list.add(line);

  }
//  System.out.println(list.get(0).substring(6,14));
  Collections.sort(list, new Comparator<String>() {
   @Override
   public int compare(String o1, String o2) {
    int year1 = Integer.parseInt(o1.substring(6, 10));
    int year2 = Integer.parseInt(o2.substring(6, 10));
    int month1 = Integer.parseInt(o1.substring(10, 12));
    int month2 = Integer.parseInt(o2.substring(10, 12));
    int day1 = Integer.parseInt(o1.substring(12, 14));
    int day2 = Integer.parseInt(o2.substring(12, 14));
    if (year1 != year2) {
     return year1 - year2;
    } else if (month1 != month2) {
     return month1 - month2;
    } else
     return day1 - day2;
   }
  });

  line =sc.nextLine();


  while (true){
   if(line .equals("sort1")){
    for(String str:list){
     System.out.println(str.substring(6,10)+"-"+str.substring(10,12)+"-"+str.substring(12,14));
    }
    line =sc.nextLine();
    continue;
   }
   if(line.equals("sort2")){
    for (String str:list){
     System.out.println(str);
    }
    line =sc.nextLine();
    continue;
   }
   System.out.println("exit");
   break;
   }

 }
}



class Elephant {

    private String name; // 名称
    private int age; // 年龄
    private String color; // 颜色
    private int weight; // 体重，单位 kg
    private boolean hasTusks; // 是否有象牙

    /**
     * 构造函数
     */
    public Elephant(String name, int age, String color, int weight, boolean hasTusks) {
        this.name = name;
        this.age = age;
        this.color = color;
        this.weight = weight;
        this.hasTusks = hasTusks;
    }

    void eat() {
        System.out.println(name + " is eating.");
    }

    public void sleep() {
        System.out.println(name + " is sleeping.");
    }

    public void trumpeting() {
        System.out.println(name + " is trumpeting.");
    }

    public void takeBath() {
        System.out.println(name + " is taking a bath.");
    }

    public void walk() {
        System.out.println(name + " is walking.");
    }

    public void squirtWater() {
        System.out.println(name + " is squinting water.");
    }

    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;
    }

    public String getColor() {
        return color;
    }

    public void setColor(String color) {
        this.color = color;
    }

    public int getWeight() {
        return weight;
    }

    public void setWeight(int weight) {
        this.weight = weight;
    }

    public boolean isHasTusks() {
        return hasTusks;
    }

    public void setHasTusks(boolean hasTusks) {
        this.hasTusks = hasTusks;
    }
}



class Elephant1 {

    private String name; // 名称
    private int age; // 年龄
    private String color; // 颜色
    private int weight; // 体重，单位 kg
    private boolean hasTusks; // 是否有象牙


    public Elephant1(String name, int age, String color, int weight, boolean hasTusks) {
        this.name = name;
        this.age = age;
        this.color = color;
        this.weight = weight;
        this.hasTusks = hasTusks;
    }

    public void eat() {
        System.out.println(name + " is eating.");
    }

    public void sleep() {
        System.out.println(name + " is sleeping.");
    }


    public void trumpeting() {
        System.out.println(name + " is trumpeting.");
    }


    public void takeBath() {
        System.out.println(name + " is taking a bath.");
    }

    /**
     * 行走
     */
    public void walk() {
        System.out.println(name + " is walking.");
    }

    /**
     * 喷水
     */
    public void squirtWater() {
        System.out.println(name + " is squinting water.");
    }

    /**
     * 获取名称
     */
    public String getName() {
        return name;
    }

    /**
     * 设置名称
     */
    public void setName(String name) {
        this.name = name;
    }

    /**
     * 获取年龄
     */
    public int getAge() {
        return age;
    }

    /**
     * 设置年龄
     */
    public void setAge(int age) {
        this.age = age;
    }

    /**
     * 获取颜色
     */

}

         

        7-4 jmu-Java-04面向对象进阶-03-接口-自定义接口ArrayIntegerStack
        分数 10
        作者 郑如滨
        单位 集美大学

        定义IntegerStack接口，用于声明一个存放Integer元素的栈的常见方法:

         
        public Integer push(Integer item);
//如果item为null，则不入栈直接返回null。如果栈满，也返回null。如果插入成功，返回item。

public Integer pop();   //出栈，如果为空，则返回null。出栈时只移动栈顶指针，相应位置不置为null
public Integer peek();  //获得栈顶元素，如果为空，则返回null.
public boolean empty(); //如果为空返回true
public int size();      //返回栈中元素个数

        定义IntegerStack的实现类ArrayIntegerStack，内部使用数组实现。创建时，可指定内部数组大小。

        main方法说明

        1. 输入n，建立可包含n个元素的ArrayIntegerStack对象
        2. 输入m个值，均入栈。每次入栈均打印入栈返回结果。
        3. 输出栈顶元素，输出是否为空，输出size
        4. 使用Arrays.toString()输出内部数组中的值。
        5. 输入x，然后出栈x次，每次出栈均打印。
        6. 输出栈顶元素，输出是否为空，输出size
        import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();
        ArrayIntegerStack stack = new ArrayIntegerStack(n);

        int m = sc.nextInt();
        for (int i = 0; i < m; i++) {
            int x=sc.nextInt();
            System.out.println(stack.push(x));
        }

        System.out.print( stack.peek()+",");
        System.out.print( stack.empty()+",");
        System.out.println(stack.size());
        System.out.println( stack.toString());


        int x = sc.nextInt();
        for (int i = 0; i < x; i++) {
            System.out.println(  stack.pop());
        }
        System.out.print( stack.peek()+",");
        System.out.print( stack.empty()+",");
        System.out.println(stack.size());
        System.out.println( stack.toString());

    }
}
 interface IntegerStack {
    Integer push(Integer item);
    Integer pop();
    Integer peek();
    boolean empty();
    int size();
}
 class ArrayIntegerStack implements IntegerStack {
    private Integer[] stack;
    private int top;

    public ArrayIntegerStack(int capacity) {
        stack = new Integer[capacity];
        top = -1;
    }

    public Integer push(Integer item) {
        if (item == null || top == stack.length - 1) {
            return null;
        }
        stack[++top] = item;
        return item;
    }

    public Integer pop() {
        if (empty()) {
            return null;
        }
        return stack[top--];
    }

    public Integer peek() {
        if (empty()) {
            return null;
        }
        return stack[top];
    }

    public boolean empty() {
        return top == -1;
    }

    public int size() {
        return top + 1;
    }

    public String toString() {
        return Arrays.toString(stack);
    }
}




class Elephant {

    private String name; // 名称
    private int age; // 年龄
    private String color; // 颜色
    private int weight; // 体重，单位 kg
    private boolean hasTusks; // 是否有象牙

    /**
     * 构造函数
     */
    public Elephant(String name, int age, String color, int weight, boolean hasTusks) {
        this.name = name;
        this.age = age;
        this.color = color;
        this.weight = weight;
        this.hasTusks = hasTusks;
    }

    void eat() {
        System.out.println(name + " is eating.");
    }

    public void sleep() {
        System.out.println(name + " is sleeping.");
    }

    public void trumpeting() {
        System.out.println(name + " is trumpeting.");
    }

    public void takeBath() {
        System.out.println(name + " is taking a bath.");
    }

    public void walk() {
        System.out.println(name + " is walking.");
    }

    public void squirtWater() {
        System.out.println(name + " is squinting water.");
    }

    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;
    }

    public String getColor() {
        return color;
    }

    public void setColor(String color) {
        this.color = color;
    }

    public int getWeight() {
        return weight;
    }

    public void setWeight(int weight) {
        this.weight = weight;
    }

    public boolean isHasTusks() {
        return hasTusks;
    }

    public void setHasTusks(boolean hasTusks) {
        this.hasTusks = hasTusks;
    }
}



class Elephant1 {

    private String name; // 名称
    private int age; // 年龄
    private String color; // 颜色
    private int weight; // 体重，单位 kg
    private boolean hasTusks; // 是否有象牙


    public Elephant1(String name, int age, String color, int weight, boolean hasTusks) {
        this.name = name;
        this.age = age;
        this.color = color;
        this.weight = weight;
        this.hasTusks = hasTusks;
    }

    public void eat() {
        System.out.println(name + " is eating.");
    }

    public void sleep() {
        System.out.println(name + " is sleeping.");
    }


    public void trumpeting() {
        System.out.println(name + " is trumpeting.");
    }


    public void takeBath() {
        System.out.println(name + " is taking a bath.");
    }

    /**
     * 行走
     */
    public void walk() {
        System.out.println(name + " is walking.");
    }

    /**
     * 喷水
     */
    public void squirtWater() {
        System.out.println(name + " is squinting water.");
    }

    /**
     * 获取名称
     */
    public String getName() {
        return name;
    }

    /**
     * 设置名称
     */
    public void setName(String name) {
        this.name = name;
    }

    /**
     * 获取年龄
     */
    public int getAge() {
        return age;
    }

    /**
     * 设置年龄
     */
    public void setAge(int age) {
        this.age = age;
    }

    /**
     * 获取颜色
     */

}

        学习心得:
        深刻体会到如何设计和编码,写pta很有用