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안녕하세요 저는이 코드를 가지고 있으며 사용자에게 비디오 및 고객 ID를 입력하고 hires라는 배열 목록에 추가 할 것을 요청합니다. 파일에 arraylist를 저장하는 방법은 무엇입니까? 이 프로그램을 마치고 종료 했습니까?Java 저장 방법
import java.util.ArrayList;
import java.util.Scanner;
public class Driver {
public static final int LISTCUSTOMERS = 1;
public static final int LISTVIDEOS = 2;
public static final int LISTHIRES = 3;
public static final int HIRESTATISTICS = 4;
public static final int HIREVIDEO = 5;
public static final int RETURNVIDEO = 6;
public static final int QUIT = 7;
public final static int DEFAULT = 0;
private String[] menuText;
private static final int MAXVIDEOS = 9;
private static final int MAXCUSTOMERS = 5;
static Scanner sc = new Scanner(System.in);
private int selection;
public int MAXLENGTH = 50;
public static ArrayList<Hire>HireList = new ArrayList<Hire>();
public static Video[]videos= new Video[MAXVIDEOS];
public static Customer [] customers = new Customer[MAXCUSTOMERS];
public static String [] options = {"","List Customers", "List Videos", "List Hires", "Hire Statistics", "Hire Video", "Return Video", "Quit"};
public static Driver myMenu = new Driver (options, sc);
public static boolean more = true;
public static int option = 0;
static Customer customer;
public static void main (String [] args){
initilisation();
runHireVideo();
}
public Driver (String[] menuText, Scanner sc){
this.menuText = menuText;
}
public int getMenuSelection(){
this.displayMenu();
this.selection = sc.nextInt();
if(this.selection < DEFAULT || this.menuText.length<this.selection){
System.out.println("Your selection was invalid - using default");
this.selection = DEFAULT;
}
return this.selection;
}
public void displayMenu(){
System.out.print("\nMicroVideo Menu: \n");
for (int index = 1; index < menuText.length; index++)
System.out.println(index + ". "+ menuText [index]);
System.out.print("Enter option: ");
}
public static void runHireVideo(){
while (more){
option = myMenu.getMenuSelection();
switch(option){
case LISTCUSTOMERS:
ListCustomers();
break;
case LISTVIDEOS:
ListVideos();
break;
case LISTHIRES:
ListHires();
break;
case HIRESTATISTICS:
HireStatistics();
break;
case HIREVIDEO:
HireVideo();
break;
case RETURNVIDEO:
ReturnVideo();
break;
default:
more = false;
System.out.println("Program Exited");
break;
}
}
}
public static void initilisation(){
videos[0]=new Video("140","The Matrix ", 7.50, 3);
videos[1]=new Video("141", "Terminator 2 ", 5.00, 3);
videos[2]=new Video("142", "Shrek ", 5.00, 10);
videos[3]=new Video("143", "The Castle ", 5.00, 1);
videos[4]=new Video("146", "Sound Of Music ", 1.00, 23);
videos[5]=new Video("147", "Planet Of The Apes", 5.00, 0);
videos[6]=new Video("148", "Mission Impossible", 1.00, 15);
videos[7]=new Video("150", "Bagdad by Night", 6.00, 5);
videos[8]=new Video("151", "Lord of the Rings 1", 5.00, 0);
customers [0]= new Customer("9902JI", "Innes ", 0,43484001);
customers [1]= new Customer("8906RH", "Herbert", 0,43484000);
customers [2]= new Customer("9012GT", "Turner ", 0,43480009);
customers [3]= new Customer("9012GS", "Sparke ", 0,43480007);
customers [4]= new Customer("9012MV", "Vallance", 0,43480008);
}
public static void ListCustomers(){
System.out.printf("%-6s %-5s %6s\n", "Customer ID", "Customer Name", " Customer Phone Number");
for (int i=0;i<customers.length;i++){
System.out.println(customers[i]);
}
}
public static void ListVideos(){
System.out.printf("%-8s %-17s %6s %6s\n", "Video ID", "VideoName", " Video Price Rate", " In Stock");
for (int i=0;i<videos.length;i++){
System.out.println(videos[i]);
}
}
public static void ListHires(){
System.out.printf("%s %s %s %s %s \n","HireID", "Cust Name", "Video Name", "Days Hired", "Hire Cost");
for (Hire hire: HireList){
String Customer = customers[hire.getID(hire.getVideoID())].getCustomerName();
String videoID = videos[hire.getID(hire.getVideoID())].getTitle();
double DailyRate = videos[hire.getID(hire.getVideoID())].getRate()*hire.getDaysHired();
System.out.printf("%d %s %s %d %1.2f \n",hire.getHireID(), Customer, videoID, hire.getDaysHired(), DailyRate);
}
}
public static void HireStatistics(){
System.out.printf("%s %s %s\n", "Video ID", "Video Name", "Days Hired");
for (Hire hire: HireList){
String videoID = videos[hire.getID(hire.getVideoID())].getTitle();
System.out.printf("%s %s %d \n",hire.getVideoID(), videoID, hire.getDaysHired());
}
}
public static void HireVideo(){
int count =0;
while (count == 0){
int hireID = 1000+ HireList.size()+1;
System.out.println("Enter Customer ID");
String customerID = "9902JI";
System.out.println("Enter Video ID");
String videoID = "140";
System.out.println("Enter Days Hired");
int daysHired = 4;
System.out.println("Enter Another Hire [Y/N]?");
String Yes = sc.next();
if(Yes.equals("y")){
count = 0;
}
else if (Yes.equals("n")){
count = 1;
}
HireList.add(new Hire(hireID,customerID, videoID, daysHired, 0));
}
}
public static void ReturnVideo(){
System.out.println("Enter Customer ID");
String customerID = "9902JI";
System.out.println("Enter Video ID");
String videoID = "140";
for (int i = 0; i < HireList.size();i++){
if (HireList.get(i).getCustomerID().equals(customerID)){
HireList.remove(i);
}
}
for (int ii = 0; ii < HireList.size();ii++){
if (HireList.get(ii).getVideoID().equals(videoID)){
HireList.remove(ii);
}
}
System.out.println("Removed " + customerID);
}
}
[사용 가능한 복제 (http://stackoverflow.com/q/19065797/1883647) – ajp15243
아이디어는 당신이 실제 자바 객체를 저장하지 않는다는 것입니다. 데이터 (변수/필드)를 텍스트로 저장합니다. 그런 다음로드하기 위해 새 ArrayList에 넣은 새 객체를 만들기 위해 텍스트를 읽습니다. 그렇게한다면 데이터는 동일해질 것입니다. – Aarowaim