[Java] 명품 자바 프로그래밍(Java Programming) 4장 실습문제 6번

Practice06.java

 

 
package ch03;
 
import java.util.Scanner;
 
public class Practice06 {
    @SuppressWarnings("resource")
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        Threater threater = new Threater();
 
        while (true) {
            System.out.print("예약(1) 조회(2) 취소(3) 끝내기(4) >> ");
            switch (scan.nextInt()) {
            case 1: {
                System.out.print("좌석구분 S(1), A(2), B(3) >> ");
                switch (scan.nextInt()) {
                case 1:
                    threater.showS();
                    threater.reserve(1);
                    break;
 
                case 2:
                    threater.showA();
                    threater.reserve(2);
                    break;
 
                case 3:
                    threater.showB();
                    threater.reserve(3);
                    break;
                }
 
                break;
            }
 
            case 2: {
                threater.showSeat();
                break;
            }
 
            case 3: {
                System.out.print("좌석구분 S(1), A(2), B(3) >> ");
                switch (scan.nextInt()) {
                case 1:
                    threater.showS();
                    threater.cancel(1);
                    break;
 
                case 2:
                    threater.showA();
                    threater.cancel(2);
                    break;
 
                case 3:
                    threater.showB();
                    threater.cancel(3);
                    break;
                }
 
                break;
            }
 
            case 4: {
                System.exit(0);
            }
 
            default: {
                System.out.println("잘못 입력 하셨습니다. 다시 입력해주세요.");
 
            }
            }
 
        }
    }
}
 

Threater.java

 

 
package ch03;
 
import java.util.Scanner;
 
public class Threater {
    private String[] sClass = new String[10];
    private String[] aClass = new String[15];
    private String[] bClass = new String[20];
 
    Scanner scan;
 
    public Threater() {
        scan = new Scanner(System.in);
        for (int i = 0; i < bClass.length; i++) {
            if (i < 10) {
                sClass[i] = "---";
            }
 
            if (i < 15) {
                aClass[i] = "---";
            }
 
            bClass[i] = "---";
        }
    }
 
    public void reserve(int classNum) {
        String name = "";
        int seatNum = 0;
 
        System.out.print("이름 >> ");
        name = scan.next();
 
        System.out.print("번호 >> ");
        seatNum = scan.nextInt();
 
        try {
            switch (classNum) {
            case 1:
                sClass[seatNum - 1] = name;
                break;
 
            case 2:
                aClass[seatNum - 1] = name;
                break;
 
            case 3:
                bClass[seatNum - 1] = name;
                break;
            }
        } catch (IndexOutOfBoundsException e) {
            System.out.println("찾으시는 좌석 번호가 없습니다.");
        }
    }
 
    public void cancel(int classNum) {
        String name = "";
 
        System.out.print("이름 >> ");
        name = scan.next();
 
        switch (classNum) {
        case 1:
            for (int i = 0; i < sClass.length; i++) {
                if (sClass[i].equals(name)) {
                    sClass[i] = "---";
                    return;
                }
            }
 
            System.out.println("찾으시는 이름이 없습니다.");
 
            break;
 
        case 2:
            for (int i = 0; i < aClass.length; i++) {
                if (aClass[i].equals(name)) {
                    aClass[i] = "---";
                    return;
                }
            }
 
            System.out.println("찾으시는 이름이 없습니다.");
 
            break;
 
        case 3:
            for (int i = 0; i < bClass.length; i++) {
                if (bClass[i].equals(name)) {
                    bClass[i] = "---";
                    return;
                }
            }
 
            System.out.println("찾으시는 이름이 없습니다.");
 
            break;
        }
    }
 
    public void showS() {
        System.out.print("S>>");
        for (int i = 0; i < sClass.length; i++) {
            System.out.print(sClass[i] + " ");
        }
 
        System.out.println();
 
    }
 
    public void showA() {
        System.out.print("A>>");
        for (int i = 0; i < aClass.length; i++) {
            System.out.print(aClass[i] + " ");
        }
 
        System.out.println();
    }
 
    public void showB() {
        System.out.print("B>>");
        for (int i = 0; i < bClass.length; i++) {
            System.out.print(bClass[i] + " ");
        }
        System.out.println();
    }
 
    public void showSeat() {
        showS();
        showA();
        showB();
        System.out.println("\n 조회를 완료하였습니다.");
    }
}
 

실행 결과: