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私はData Strcuturesのための簡単なプロジェクトを終了しようとしていますが、私のプログラムでは常に表示され続けるエラーがあります。私はそれらのいくつかを修正したが、私はあきらめたいと思うものがある。多分あなたたちは私が解決策を見つけるのを助けることができましたか？ここで保存された値が常に私のプログラムで消去されるのはなぜですか？
は私のコードは、（クラスLogInSystem）です：プログラムのバグは、私が予約したときにということである
// NMQ
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class cineplexError {
private static BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
private static String integerReprompt = "Invalid integer. Try again: ";
private static String doubleReprompt = "Invalid double. Try again: ";
private static String charReprompt = "Invalid character. Try again: ";
public static String readString() {
String s = null;
try {
s = in.readLine();
} catch (IOException ex) {}
return s;
}
public static char readChar() {
char c = 0;
String s = null;
try {
s = in.readLine();
} catch (IOException ex) {}
if (s.length() == 1) {
c = s.charAt(0);
// valid = true;
} else {
System.out.print(charReprompt);
}
return c;
}
public static int readInt() {
int i = 0;
boolean valid = false;
try {
i = Integer.parseInt(in.readLine());
} catch (IOException ex) {
System.out.print(integerReprompt);
}
valid = true;
return i;
}
public static double readDouble() {
double d = 0.0;
boolean valid = true;
try {
d = Double.parseDouble(in.readLine());
} catch (IOException ex) {}
valid = true;
valid = false;
System.out.print(doubleReprompt);
return d;
}
public void pause() {
System.out.print("Press enter to continue...");
try {
in.readLine();
} catch (IOException ex) {}
}
public static void setIntegerReprompt(String prompt) {
integerReprompt = prompt;
}
public void setDoubleReprompt(String prompt) {
doubleReprompt = prompt;
}
public void setCharReprompt(String prompt) {
charReprompt = prompt;
}
}
：ここ
// NMQ
import java.util.ArrayList;
import java.util.Scanner;
import java.util.Vector;
public class LogInSystem {
private static final int MAX_SEATS = 10;
Vector<String> username = new Vector<String>();
ArrayList<String> password = new ArrayList<String>();
int p;
String Username, Password, rUsername, rPassword;
private Scanner input = new Scanner(System.in);
public LogInSystem() {
loginScreen();
}
private void loginScreen() {
boolean done = false;
do {
printMainMenu();
int choice = getMainMenuChoice();
switch (choice) {
case 1: // Log In
logIn();
break;
case 2: // To Register
register();
break;
case 3: // Exit
done = true;
break;
}
} while (!done);
}
//Registration
private void register() {
System.out.println("Input a Username");
Username = input.next();
System.out.println("Input a Password");
Password = input.next();
System.out.println("... Registered!");
}
//Log In
private void logIn() {
p = 0;
System.out.println("Input a Username");
rUsername = input.next();
System.out.println("Input a Password");
rPassword = input.next();
// If the log in is successful it will got to the next menu
if(rUsername.equals(Username)&& rPassword.equals(Password))
{
System.out.println("... Logging In");
boolean done = false;
String[] seats = new String[MAX_SEATS]; // the item list
initializeItems(seats);
// Printing of 2nd menu
do {
printMainMenu2();
int choice = getMainMenuChoice2(); // choice off of the main menu
switch (choice) {
case 1: // Adding Seat
addSeat(seats);
break;
case 2: // Viewing Seat List
viewSeatList(seats);
break;
case 3: // Exit
done = true;
break;
}
} while (!done);
}
else
System.out.println("Invalid log in, please try again.");
}
private int getMainMenuChoice() {
int choice; // choice entered
boolean valid = false; // is choice valid?
do {
System.out.print(">>>>> ");
choice = cineplexError.readInt();
if (1 <= choice && choice <= 4) {
valid = true;
} else {
System.out.println("Invalid choice.");
}
} while (!valid);
return choice;
}
private void printMainMenu() {
System.out.println("\nMain Menu\n");
System.out.println("Press 1 to Log In");
System.out.println("Press 2 to Register");
System.out.println("Press 3 to Exit");
System.out.println();
}
public static void main(String[] args) {
new LogInSystem();
}
int getMainMenuChoice2() {
int choice; // choice entered
boolean valid = false; // is choice valid?
do {
System.out.print(">>>>> ");
choice = cineplexError.readInt();
if (1 <= choice && choice <= 4) {
valid = true;
} else {
System.out.println("Invalid choice.");
}
} while (!valid);
return choice;
}
void printMainMenu2() {
System.out.println("\nMain Menu\n");
System.out.println("Press 1 to Reserve a Seat");
System.out.println("Press 2 to View the Seat List");
System.out.println("Press 3 to Exit Buying");
System.out.println();
}
void initializeItems(String[] seats) {
for (int i = 0; i < seats.length; i++) {
seats[i] = "";
}
}
void addSeat(String[] seats) {
int seatIndex = findEmptySeatList(seats); // index of first empty item list
if (seatIndex == seats.length) {
System.out.println("Seat is already occupied. Sorry.");
}
else {
String seat = getSeatName(); // seat's name
seats[seatIndex] = seat;
System.out.println(seat + " is on seat list #"
+ (seatIndex + 1));
}
}
int findEmptySeatList(String[] seat) {
for (int i = 0; i < seat.length; i++) {
if (isEmpty(seat, i)) {
return i;
}
}
return seat.length;
}
boolean isEmpty(String[] seats, int seatIndex) {
return seats[seatIndex].equals("");
}
String getSeatName() {
System.out.print("Enter the name of reservator: ");
return cineplexError.readString();
}
void viewSeatList(String[] seats) {
System.out.println("\nSeat List\n");
for (int i = 0; i < seats.length; i++) {
System.out.println((i + 1) + ". " + seats[i]);
}
}
}
は、他のクラス（cineplexError）でありますもう一度ログインすると、座席リストを見ると、予約者の名前または座席を予約している人の名前が消去されています。値を永続的に格納するコントロールステートメントを置くべきですか？あなたは私を助けることができます？おかげさまで
私は間違ったことを見ます。ありがとうございます！ – Coolai