oop前三次作业总结
前言：这是我第一次写oop的设计作业，其中不乏踩坑，乱设计，瞎设计，但三次题目都能很好的提高个人能力，这是我跨入面向对象的第一步，只有第一步走踏实了，后面的课中，才能走的更快更稳，更稳更远。
[*]写前三次作业的过程中，每个题目都要求合理正确设计各种类，要求实现类的封装性，合理设计类间关系，符合类的单一职责原则，熟悉正则表达式。
第一次题目集较为简单，需要设计的类较少，即可完成题目。
第二次题目集前三题仍然比较简单，第四题在第一次题目集最后一题的基础上进行迭代，增加类的数量，题目难度较第一次加大，总体来说，不算太难。
第三次题目集共三题，前两题题目内容较少，稍花时间设计即可顺利完成，最后一题依旧在前俩次题目的基础上进行进一步迭代，难度中等。
设计与分析：
[*]对于第一次作业最后一题：
点击查看代码class Question { private int number; private String content; private String standardAnswer; public Question(int number, String content, String standardAnswer) { this.number = number; this.content = content; this.standardAnswer = standardAnswer; } public int getNumber() { return number; } public String getContent() { return content; } public String getStandardAnswer() { return standardAnswer; } public boolean checkAnswer(String answer) { return answer.equals(standardAnswer); }}class Paper { private List questions = new ArrayList(); public void addQuestion(Question question) { questions.add(question); } public Question getQuestion_Number(int number) { for (Question question : questions) { if (question.getNumber() == number) { return question; } } return null; }}class Answer { private Paper paper; private ArrayList answers = new ArrayList(); private ArrayList results = new ArrayList(); public Answer(Paper paper) { this.paper = paper; } public void saveOne_Your_answer(String answer) { answers.add(answer); } public void saveAnswers() { for (int i = 0; i < answers.size(); i++) { Question question = paper.getQuestion_Number(i + 1); if (question != null) { results.add(question.checkAnswer(answers.get(i))); } } } public void outputResults() { for (int i = 0; i < answers.size(); i++) { Question question = paper.getQuestion_Number(i + 1); if (question != null) { System.out.println(question.getContent() + "~" + answers.get(i)); } } int i=0; for (boolean result : results) { if(i!=0){ System.out.print(" " + result); } else { System.out.print(result); } i++; } }}public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int questionNumber = sc.nextInt(); sc.nextLine(); Paper paper = new Paper(); Answer answerSheet = new Answer(paper); for(int i=0;i答卷卷子 public Student() { } public void setId(String id) { this.id = id; } public void setName(String name) { this.name = name; } public String getId() { return id; } public String getName() { return name; }}class Output{ HashMap id_for_answer = new HashMap(); ArrayList student_order = new ArrayList(); ArrayList students = new ArrayList(); HashMap papers = new HashMap(); Question_Set question_set = new Question_Set(); ArrayListun_question_set = new ArrayList(); public Output() { } public void save_paper_set(Integer paper_num,Paper paper){ papers.put(paper_num,paper); } public void save_student_answer(String id,Integer paper_num){ id_for_answer.put(id,paper_num); student_order.add(id); } public void output_question_and_result(){ for(String student : student_order){//确定答题学生 int []score= new int; Arrays.fill(score, 0); int count_answer_question = 0; for(Student new_student : students){//寻找该学生 if(new_student.getId().equals(student)){ int answer_paper_num = id_for_answer.get(student);//寻找所答试卷编号 Paper paper = papers.get(answer_paper_num); if(paper!=null){ for(Integer answer_num : paper.answer_order){//找所答题目 T for(Question question : paper.questions){//2 N if(question!=null) { if(question.getQuestion_num()==0){ continue; }// System.out.println(question.getQuestion_num()); if (question.getQuestion_num() == answer_num) { if (question.isIf_effective() && !question.getQuestion_content().equals("null_content")) {//题目有效 System.out.print(question.getQuestion_content() + "~");//输出题目内容 String your_answer = new_student.students_to_answersheet.get(student).answers.get(count_answer_question+1).getYour_answer();//你的答案 System.out.println(your_answer + "~" + question.judge_right_or_wrong(your_answer));//结果 if (question.judge_right_or_wrong(your_answer)) {//题目正确 score = paper.questions_score.get(question.getQuestion_num()); } } else {//题目无效 if (answer_num > new_student.students_to_answersheet.get(student).getTotal_answer_number()) { System.out.println("answer is null"); } else {// int Num = new_student.students.get(student).answers.get(answer_num).getOrder_num();// System.out.println(Num);// System.out.print("*");System.out.println(answer_num); if (question.getQuestion_content().equals("null_content")||question.getQuestion_standardAnswer().equals("null_answer")) { System.out.println("non-existent question~0"); } else { System.out.print("the question "); System.out.print(question.getQuestion_num()); System.out.println(" invalid~0"); } } } count_answer_question++; break; } else{ for(Integer a : un_question_set){ if(Objects.equals(a, answer_num)){ System.out.println("non-existent question~0"); count_answer_question++; break; } } } } } } System.out.print(new_student.getId() + " " + new_student.getName() + ":"); int sum_score = 0; for(int i=0;i
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