03번째 프로그램(Class 개념)

Posted on: 2019년 03월 18일 2019년 03월 18일
Categories: 강의자료, 자바

스마트폰의 연락처(전화번호부)에 저장된 정보는 무엇이 있나?
1. 이름(name) : String
2. 휴대폰(phone) :
3. 단축번호(speed_dial) :
4. .
5. .

S003_Contacts 소스 코드 : 위 연락처 정보를 활용한 코드(Class 사용 없음)

package kr.ac.jj.java201812345;

import java.util.Scanner;

public class S003_Contacts {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner scan = new Scanner(System.in);

		System.out.print("이름 : ");
		String name = scan.next();

		System.out.print("휴대폰 : ");
		String phone = scan.next();

		//...

		System.out.println(
				"이름 : " + name
				+ " 휴대폰 : " + phone
				);
	}

}

package kr.ac.jj.java201812345;

import java.util.Scanner;

public class S003_Contacts {

public static void main(String[] args) {

// TODO Auto-generated method stub

Scanner scan = new Scanner(System.in);

System.out.print("이름 : ");

String name = scan.next();

System.out.print("휴대폰 : ");

String phone = scan.next();

//...

System.out.println(

"이름 : " + name

+ " 휴대폰 : " + phone

);

}

S003_ContactsClass1 소스 코드 : S003_Contacts를 Class 사용 코드로 변환1

package kr.ac.jj.java201812345;

import java.util.Scanner;

public class S003_ContactsClass1 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner scan = new Scanner(System.in);
		Person p = new Person();

		System.out.print("이름 : ");
		p.name = scan.next();

		System.out.print("휴대폰 : ");
		p.phone = scan.next();

		//...

		System.out.println(
				"이름 : " + p.name
				+ " 휴대폰 : " + p.phone
				);

	}

}

class Person{
	String name;
	String phone;
	int speed_dial;
}

package kr.ac.jj.java201812345;

import java.util.Scanner;

public class S003_ContactsClass1 {

public static void main(String[] args) {

// TODO Auto-generated method stub

Scanner scan = new Scanner(System.in);

Person p = new Person();

System.out.print("이름 : ");

p.name = scan.next();

System.out.print("휴대폰 : ");

p.phone = scan.next();

//...

System.out.println(

"이름 : " + p.name

+ " 휴대폰 : " + p.phone

);

}

class Person{

String name;

String phone;

int speed_dial;

}

S003_ContactsClass2 소스 코드 : S003_Contacts를 Class 사용 코드로 변환2

package kr.ac.jj.java201812345;

import java.util.Scanner;

public class S003_ContactsClass2 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Friend p = new Friend();

		p.Input();
		p.Print();
	}

}

class Friend{
	String name;
	String phone;
	int speed_dial;

	public void Input() {
		Scanner scan = new Scanner(System.in);

		System.out.print("이름 : ");
		this.name = scan.next();

		System.out.print("휴대폰 : ");
		this.phone = scan.next();
	}

	public void Print() {
		System.out.println(
				"이름 : " + this.name
				+ " 휴대폰 : " + this.phone
				);
	}
}

package kr.ac.jj.java201812345;

import java.util.Scanner;

public class S003_ContactsClass2 {

public static void main(String[] args) {

// TODO Auto-generated method stub

Friend p = new Friend();

p.Input();

p.Print();

}

class Friend{

String name;

String phone;

int speed_dial;

public void Input() {

Scanner scan = new Scanner(System.in);

System.out.print("이름 : ");

this.name = scan.next();

System.out.print("휴대폰 : ");

this.phone = scan.next();

}

public void Print() {

System.out.println(

"이름 : " + this.name

+ " 휴대폰 : " + this.phone

);

}

위 S003_ContactsClass2 소스 코드에 도서 목록(Book) 클래스를 추가하여 다음 코드를 완성하시오

package kr.ac.jj.java201812345;

import java.util.Scanner;

public class S003_ContactsClass2 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Friend p = new Friend();

		p.Input();
		p.Print();

		Book b = new Book();
		b.Input();
		b.Print();
	}

}

class Friend{
	String name;
	String phone;
	int speed_dial;

	public void Input() {
		Scanner scan = new Scanner(System.in);

		System.out.print("이름 : ");
		this.name = scan.next();

		System.out.print("휴대폰 : ");
		this.phone = scan.next();
	}

	public void Print() {
		System.out.println(
				" 이름 : " + this.name
				+ " 휴대폰 : " + this.phone
				);
	}
}

package kr.ac.jj.java201812345;

import java.util.Scanner;

public class S003_ContactsClass2 {

public static void main(String[] args) {

// TODO Auto-generated method stub

Friend p = new Friend();

p.Input();

p.Print();

Book b = new Book();

b.Input();

b.Print();

}

class Friend{

String name;

String phone;

int speed_dial;

public void Input() {

Scanner scan = new Scanner(System.in);

System.out.print("이름 : ");

this.name = scan.next();

System.out.print("휴대폰 : ");

this.phone = scan.next();

}

public void Print() {

System.out.println(

" 이름 : " + this.name

+ " 휴대폰 : " + this.phone

);

}

class Book의 필드
1. 제목 : title
2. 저자 : author
3. 출판사 : publisher
4. 가격 : price

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