[Week1] 1장 객체지향 모델링 실습

1. 체크포인트

public class Main {     public static void main(String[] args) {         Person person = new Person("홍길동");         Phone phone1 = new Phone("010-1234-5678");         Phone phone2 = new Phone("02-123-1234");         Phone phone3 = new Phone("010-2345-6789");         person.addPhone(phone1);         person.addPhone(phone2);         person.addPhone(phone3);     } } public class Person {     private String name="";     Phone[] phones;     int length=0;     public Person(String name){         phones = new Phone[2];         this.name=name;     }     public void addPhone(Phone phone){         if (length==2){             System.out.println("더 이상 전화를 추가할 수 없습니다.");             return;         }         phones[length]=phone;         length++;         System.out.println(phone.getPhoneNumber()+"이 추가되었습니다.");     } } public class Phone {     String phoneNumber="";     public Phone(String phoneNumber){         this.phoneNumber = phoneNumber;     }     public String getPhoneNumber(){         return phoneNumber;     } }

public class Main {     public static void main(String[] args) {         Person person = new Person("홍길동");         Phone homePhone1 = new Phone("집전화1", "거실", "02-123-1234");         Phone homePhone2 = new Phone("집전화2", "안방", "02-123-1245");         Phone officePhone = new Phone("사무실전화", "사무실","02-760-1234");         person.addHomePhone(homePhone1);         person.addHomePhone(homePhone2);         person.addOfficePhone(officePhone);     } } import java.util.Vector; public class Person {     private String name;     private Vector<Phone> homePhones;     private Phone officePhone;     public Person(String name){         this.name=name;         homePhones = new Vector<>();     }     public void addHomePhone(Phone phone){         System.out.println(phone.getPhoneName()+"이 추가되었습니다.");         System.out.println(phone.getPhoneLocation()+"에 있습니다.");         homePhones.add(phone);     }     public void addOfficePhone(Phone phone){         System.out.println(phone.getPhoneName()+"이 추가되었습니다.");         System.out.println(phone.getPhoneLocation()+"에 있습니다.");         officePhone = phone;     } } public class Phone {     private String phoneName;     private String phoneLocation;     private String phoneNumber;     public Phone(String phoneName, String phoneLocation, String phoneNumber){         this.phoneName=phoneName;         this.phoneLocation=phoneLocation;         this.phoneNumber=phoneNumber;     }     public String getPhoneName(){         return phoneName;     }     public String getPhoneLocation(){         return phoneLocation;     }     public String getPhoneNumber(){         return phoneNumber;     } }

 

2. 아래 관계에 대해 코드로 작성하시오

public class Main {     public static void main(String[] args) {         Student student = new Student("홍길동", "250113", "컴퓨터공학");         Course course1 = new Course("설계패턴", "COM123");         Course course2 = new Course("웹프로그래밍", "COM345");         Course course3 = new Course("캡스톤디자인", "COM567");         student.registerCourse(course1);         student.registerCourse(course2);         student.registerCourse(course3);         student.dropCourse(course3);     } } public class Course {     private String courseName;     private String courseNumber;     public Course(String courseName, String courseNumber){         this.courseName=courseName;         this.courseNumber=courseNumber;     }     public String getCourseName(){         return courseName;     } } import java.util.Vector; public class Student {     private String name;     private String stdNumber;     private String major;     private Vector<Course> courses;     public Student(String name, String stdNumber, String major){         this.name=name;         this.stdNumber=stdNumber;         this.major=major;         courses=new Vector<>();     }     public void registerCourse(Course course){         System.out.println(course.getCourseName()+"이 등록되었습니다.");         courses.add(course);     }     public Vector<Course> dropCourse(Course course){         System.out.println(course.getCourseName()+"을 삭제합니다.");         courses.remove(course);         return courses;     } }

 

3. 아래 관계에 대해 코드로 작성하시오

public class Main {     public static void main(String[] args) {         Bird bird = new Bird();         Plane plane = new Plane();         bird.fly();         plane.fly();     } } package org.example; public class Bird implements Flyable{     @Override     public void fly() {         System.out.println("새가 날아오릅니다.");     } } package org.example; public interface Flyable {     void fly(); } package org.example; public class Plane implements Flyable{     @Override     public void fly() {         System.out.println("비행기가 이륙합니다.");     } }