[Java] 명품 자바 프로그래밍(Java Programming) 7장 실습문제 12번 Java / CSE

Phone.java

 

 
package ch07;
 
public class Phone {
    private String name;
    private String address;
    private String phoneNumber;
 
    public Phone() {
 
    }
 
    public Phone(String name, String address, String phoneNumber) {
        super();
        this.name = name;
        this.address = address;
        this.phoneNumber = phoneNumber;
    }
 
    public String getName() {
        return name;
    }
 
    public void setName(String name) {
        this.name = name;
    }
 
    public String getAddress() {
        return address;
    }
 
    public void setAddress(String address) {
        this.address = address;
    }
 
    public String getPhoneNumber() {
        return phoneNumber;
    }
 
    public void setPhoneNumber(String phoneNumber) {
        this.phoneNumber = phoneNumber;
    }
 
    public String toString() {
        return name + " " + address + " " + phoneNumber;
    }
}
 

OpenChallenge07.java

 

 
package ch07;
 
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Scanner;
import java.util.Set;
 
public class OpenChallenge07 {
    @SuppressWarnings("resource")
    public static void main(String[] args) {
        HashMap<String, Phone> phoneBook = new HashMap<String, Phone>();
        Scanner scan = new Scanner(System.in);
        int chooser = 0;
 
        String name = "";
        String address = "";
        String phoneNumber = "";
 
        Phone p;
 
        System.out.println("---------------------------------------------");
        System.out.println("전화번호 관리 프로그램을 시작합니다.");
        System.out.println("---------------------------------------------");
 
        while (true) {
            System.out
                    .print("삽입:0, 삭제:1, 찾기:2, 전체보기:3, 파일 저장:4, 파일 읽기: 5, 종료:6 >> ");
            chooser = scan.nextInt();
 
            switch (chooser) {
            case 0:
                System.out.print("이름 >> ");
                name = scan.next();
 
                System.out.print("주소 >> ");
                address = scan.next();
 
                System.out.print("전화번호 >> ");
                phoneNumber = scan.next();
 
                p = new Phone(name, address, phoneNumber);
                phoneBook.put(name, p);
                break;
 
            case 1:
                System.out.print("이름 >> ");
                name = scan.next();
 
                p = searchName(phoneBook, name);
 
                if (p != null) {
                    phoneBook.remove(name);
                } else {
                    System.out.println(name + "은 등록되지 않은 사람입니다.");
                }
 
                break;
 
            case 2:
                System.out.print("이름 >> ");
                name = scan.next();
 
                p = searchName(phoneBook, name);
 
                if (p != null) {
                    System.out.println(p);
                } else {
                    System.out.println(name + "은 등록되지 않은 사람입니다.");
                }
 
                break;
 
            case 3:
                Set<String> keys = phoneBook.keySet();
                Iterator<String> it = keys.iterator();
 
                while (it.hasNext()) {
                    String key = it.next();
                    Phone value = phoneBook.get(key);
                    System.out.println(value);
                }
                break;
 
            case 4:
                try {
                    File file = new File("C:\\tmp\\phoneBook.txt");
                    BufferedWriter bw = new BufferedWriter(new FileWriter(file));
 
                    Set<String> key = phoneBook.keySet();
                    Iterator<String> ite = key.iterator();
 
                    while (ite.hasNext()) {
                        String keyField = ite.next();
                        Phone phone = phoneBook.get(keyField);
                        bw.write(phone.toString());
                        bw.newLine();
                    }
 
                    bw.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                break;
 
            case 5:
                try {
                    File file = new File("C:\\tmp\\phoneBook.txt");
                    BufferedReader br = new BufferedReader(new FileReader(file));
 
                    String data = "";
 
                    while ((data = br.readLine()) != null) {
                        System.out.println(data);
                    }
 
                    br.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                break;
 
            case 6:
                System.out.println("프로그램을 종료합니다...");
                System.exit(0);
 
            default:
                System.out.println("잘못 입력 하셨습니다.");
            }
        }
 
    }
 
    public static Phone searchName(HashMap<String, Phone> map, String name) {
        Phone p = null;
 
        p = map.get(name);
 
        return p;
    }
}