[Java-기초] 실습 (학점 산출 프로그램 2)

▶ 프로그램 업그레이드하기(어제 만든 학점 산출 프로그램을 바탕으로!)

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*과목과 학점 정책이 추가되는 경우

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Define.java

package utils;

public class Define {
	public static final int KOREAN = 1001;    // 국어
	public static final int MATH = 2001;      // 수학
	public static final int DANCE = 3001;      // 방송 댄스
	public static final int ENGLISH = 4001;      // 영어
	
	public static final int AB_TYPE = 0;      // 일반 과목 학점 산출 정책
	public static final int SAB_TYPE = 1;     // 필수 과목 학점 산출 정책
	public static final int PF_TYPE = 2;     // pass/fail 방식 
}

 

 

TestMain.java

package test;

import school.School;
import school.Score;
import school.Student;
import school.Subject;
import school.report.GenerateGradeReport;
import utils.Define;

public class TestMain {
	School goodSchool = School.getInstance();
	Subject korean;
	Subject math;
	Subject dance;
	Subject english;	

	GenerateGradeReport gradeReport = new GenerateGradeReport();

	public static void main(String[] args) {
		TestMain test = new TestMain();

		test.createSubject();
		test.createStudent();

		String report = test.gradeReport.getReport(); // 성적 결과 생성
		System.out.println(report);
	}

	public void createSubject() { // 과목 생성
		korean = new Subject("국어", Define.KOREAN);
		math = new Subject("수학", Define.MATH);
		dance = new Subject("방송 댄스", Define.DANCE); 
		english = new Subject("영어", Define.ENGLISH); 
		
		dance.setGradeType(Define.PF_TYPE); // 학점 평가 정책 지정

		goodSchool.addSubject(korean);
		goodSchool.addSubject(math);
		goodSchool.addSubject(dance);
		goodSchool.addSubject(english);
	}

	public void createStudent() { // 학생 생성
		Student student1 = new Student(181213, "안성원", korean);
		Student student2 = new Student(181518, "오태훈", math);
		Student student3 = new Student(171230, "이동호", korean);
		Student student4 = new Student(171255, "조성욱", korean);
		Student student5 = new Student(171590, "최태평", math);

		goodSchool.addStudent(student1); // goodSchool에 학생 추가
		goodSchool.addStudent(student2);
		goodSchool.addStudent(student3);
		goodSchool.addStudent(student4);
		goodSchool.addStudent(student5);

		korean.register(student1); // 국어 과목을 수강하는 학생 등록
		korean.register(student2);
		korean.register(student3);
		korean.register(student4);
		korean.register(student5);

		math.register(student1); // 수학 과목을 수강하는 학생 등록
		math.register(student2);
		math.register(student3);
		math.register(student4);
		math.register(student5);

		dance.register(student1); // 방송 댄스를 수강하는 학생 등록
		dance.register(student2);
		dance.register(student3);
		
		english.register(student3); // 영어 과목을 수강하는 학생 등록
		english.register(student4);
		english.register(student5);
		
		addScoreForStudent(student1, korean, 95); // 각 학생의 과목 점수 추가
		addScoreForStudent(student1, math, 56);

		addScoreForStudent(student2, korean, 95);
		addScoreForStudent(student2, math, 95);

		addScoreForStudent(student3, korean, 100);
		addScoreForStudent(student3, math, 88);
		addScoreForStudent(student3, english, 96);

		addScoreForStudent(student4, korean, 89);
		addScoreForStudent(student4, math, 95);
		addScoreForStudent(student4, english, 80);

		addScoreForStudent(student5, korean, 85);
		addScoreForStudent(student5, math, 56);
		addScoreForStudent(student5, english, 55);
		
		addScoreForStudent(student1, dance, 95);
		addScoreForStudent(student2, dance, 85);
		addScoreForStudent(student3, dance, 55);
		
	}

	public void addScoreForStudent(Student student, Subject subject, int point) { // 과목별 점수를 추가하는 메서드
		Score score = new Score(student.getStudentID(), subject, point);
		student.addSubjectScore(score);
	}
}

 

 

PassFailEvaluation.java

package grade;

public class PassFailEvaluation implements GradeEvaluation {

	@Override
	public String getGrade(int point) {
		if (point >= 70)
			return "P";
		else
			return "F";
	}
}

 

 

GenerateGradeReport.java

package school.report;

import java.util.ArrayList;

import grade.BasicEvaluation;
import grade.GradeEvaluation;
import grade.MajorEvaluation;
import grade.PassFailEvaluation;
import school.School;
import school.Score;
import school.Student;
import school.Subject;
import utils.Define;

public class GenerateGradeReport {
	School school = School.getInstance(); // 싱글톤(객체가 생성되어도 객체의 속성 값들이 유지됨.)
	public static final String TITLE = " 수강생 학점 \t\t\n";
	public static final String HEADER = " 이름 | 학번 |필수과목| 점수  \n";
	public static final String LINE = "---------------------------\n";

	private StringBuffer buffer = new StringBuffer();

	public String getReport() {
		ArrayList<Subject> subjectList = school.getSubjectList(); // 모든 과목에 대한 학점 산출

		for (Subject subject : subjectList) {
			makeHeader(subject);
			makeBody(subject);
			makeFooter();
		}
		return buffer.toString(); // String으로 반환
	}

	public void makeHeader(Subject subject) {
		buffer.append(GenerateGradeReport.LINE);
		buffer.append("\t" + subject.getSubjectName());
		buffer.append(GenerateGradeReport.TITLE);
		buffer.append(GenerateGradeReport.HEADER);
		buffer.append(GenerateGradeReport.LINE);
	}

	public void makeBody(Subject subject) {
		ArrayList<Student> studentList = subject.getStudentList(); // 각 과목의 학생들

		for (int i = 0; i < studentList.size(); i++) {
			Student student = studentList.get(i);
			buffer.append(student.getStudentName());
			buffer.append(" | ");
			buffer.append(student.getStudentID());
			buffer.append(" | ");
			buffer.append(student.getMajorSubject().getSubjectName() + "\t");
			buffer.append(" | ");

			getScoreGrade(student, subject); // 학생별 수강 과목 학점 계산

			buffer.append("\n");
			buffer.append(LINE);
		}
	}

	public void getScoreGrade(Student student, Subject Subject) {
		ArrayList<Score> scoreList = student.getScoreList();
		int majorID = student.getMajorSubject().getSubjectID();

		GradeEvaluation[] gradeEvaluation = { new BasicEvaluation(), new MajorEvaluation(), 
				                              new PassFailEvaluation() }; // 학점 평가 클래스																								

		for (int i = 0; i < scoreList.size(); i++) { // 학생이 가진 점수를
			Score score = scoreList.get(i);
			if (score.getSubject().getSubjectID() == Subject.getSubjectID()) { // 학점 산출할 과목
				String grade;
				
				if (Subject.getGradeType() == Define.PF_TYPE) { // pass/fail 방식
					grade = gradeEvaluation[Define.PF_TYPE].getGrade(score.getPoint());
				} else {
					if (score.getSubject().getSubjectID() == majorID) // 필수 과목인 경우
						grade = gradeEvaluation[Define.SAB_TYPE].getGrade(score.getPoint()); // 필수 과목 학점 평가 방법
					else 
						grade = gradeEvaluation[Define.AB_TYPE].getGrade(score.getPoint()); // 필수 과목이 아닌 경우

					buffer.append(score.getPoint());
					buffer.append(":");
					buffer.append(grade);
					buffer.append(" | ");
				}
			}
		}
	}

	public void makeFooter() {
		buffer.append("\n");
	}
}

<결과값>

-머야 방송댄스 점수 왜 출력안돼?? 도저히 원인을 모르겠다