I've written it.
There is too much code to post.
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The following is part of the code: (incomplete)
public class Bank {
private ArrayListlt; Accountgt; list=new ArrayListlt; Accountgt; ();
public static final long startNO=1000L;
private static long NO=startNO;
public void registery(){
Scanner scan =new Scanner(System.in);
String name, key1, key2, id, email;
double money=0;
int state=0 ;
do {
System.out.print("Please select the type of account you want to open 1. Debit card 2. Credit card: ");
try {
state=Integer.parseInt(scan.next().trim());
if(state!=1amp;amp;state!=2)
throw new Exception();
}
catch (Exception e) {
System.out.println("Illegal character or command input Error");
}
}while(state==0);
do {
System.out.print( "Enter the user name, the length is gt;=3:");
name=scan.next().trim();
if(name.length()lt; 3)
System.out.println("Username is not long enough");
else break;
} while (true);
do {
System.out.print("Enter the password, the length is gt; = 6, must contain numbers, characters and special symbols: ");
key1= scan.next().trim();
if(key1.length()lt; 6){
System.out.println("Password length is not long enough");
continue;}
if(!key1.matches("\\d \\p{Punct} \\p{Alpha} ")amp;amp;!
key1.matches("\\p{Alpha} \\p{Punct} \\d ")){
System.
out.println("The password format is incorrect and must contain numbers, characters and special symbols:");
continue;}
System.out.print("Confirm password:") ;
key2=scan.next().trim();
if(!key1.equals(key2))
System.out.println( "Two passwords do not match");
else break;
} while (true);
do {
System. out.print("Enter the 18-digit ID number: ");
id=scan.next().trim();
if(id.length()! =18||!id.matches("\\d "))
System.out.println("The length of the ID number does not match or the format is incorrect");
else break;
} while(true);
do {
System.out.print("Please enter your email address: ");
email=scan.next().trim();
if(!email.matches("^\\w @\\w $"))
System .out.println("The email format is incorrect");
else break;
} while (true);
do {
System.out.print("Please enter the deposit amount: ");
try {
money=Double.parseDouble(scan.next().trim());
if(moneylt;=0)
throw new Exception();
}
catch (Exception e){
System.out.println("The amount format is wrong or unreasonable (lt;=0)");
}
} while (moneylt;=0);
System.out.print("Account opened successfully, card number is: " NO " type is " (state==1? "Debit Card": "Credit Card") " Name: " name
" ID number: " id " Email: " email " Pre-deposit amount: " money "yuan");
if(state==2){
CreditAccount creditAccount=new CreditAccount(NO,nam
e, key1, id, email, money);
System.out.println("The available amount is: " (creditAccount.getCeiling() money "yuan"));
list.add(creditAccount);
}
else{
list.add(new DebtAccount(NO, name, key1, id, email, money) );
System.out.println();
}
NO ;
}
public Account login(long id, String password){
Account a=searchAccount(id);
if(a!=null)
if(a. getPasswd().equals(password))
return a;
return null;
}
public Account deposit(long id , double money){
Account a=searchAccount(id);
if(a!=null){
a.deposit(money);
return a;
}
return null;
}
public Account withdraw(long id, double money){
Account a=searchAccount(id);
if(a!=null)
if(a.withdraw(money)gt;0 )
return a;
return null;
}
public Account setCeiling(long id, double ceiling){
Account a=searchAccount(id);
if(a!=null)
if(a.getClass()==CreditAccount.class){//Find The id corresponds to the account and is a credit card account
((CreditAccount)a).setCeiling(ceiling);
return a;
}
return null;
}
public String balanceStr(Account a){
String str="Your balance is:" a.getBalance( );
if(a.getClass()==CreditAccount.class)
str=str "The available credit limit is:"
(((CreditAccount)a).getCeiling() a. getBalance()) "元";
return str;
}
public double allBalance(boolean isComputeCredit){
double allRemain =0;
if(isComputeCredit){
for(Account a: list)
if(a.getClass()==CreditAccount.class)
allRemain=allRemain a.getBalance();
}
else{
for(Account a: list)
allRemain=allRemain a.getBalance();
}
return allRemain;
}
public Account searchAccount(long id){
for(Account a: list)
if(a.getId()==id)
return a;
return null;
}
public static void main(String[] args) {
Bank bank=new Bank();
Scanner scan=new Scanner(System.in);
int state=0;
do {
System.out.print("Welcome To use the online banking system, please enter the instructions 1. Open an account 2. Log in 3. Exit: ");
try {
state=Integer.parseInt(scan.next().trim( ));
if(state!=1amp;amp;state!=2amp;amp;state!=3)
throw new Exception();
} catch (Exception e) {
System.out.println("Illegal character or command input error");
continue;
}
if(state==1)
bank.registery();
else
if(state==2){
Account log=bank.logCheck();
if(log!=null){
bank.operate( log);
}
}
} while (state!=3);
System.out.println("Thank you Use, welcome to use next time!!");
}
public Account logCheck(){
Scanner scan=new Scanner(System.in);
String password;
long id=0;
do {
try {
System.out .print("Enter card number:");
id=Long.parseLong(scan.next().trim());
if(idlt;startNO)
throw new Exception();
}
catch (Exception e) {
System.out.println("The card number is not long enough or illegal Character input ");
continue;
}
do {
System.out.print("Enter password: ") ;
password=scan.next().trim();
if(password.length()lt;6)
System.out.println ("Password length is not long enough");
else break;
} while (true);
Account log=login(id, password);
p>
if(log==null){
System.out.println("Login failed! The card number or password is incorrect, please log in again! ");
}
else{
System.out.println("Login successful! Your card type is " (log.getClass()= =
CreditAccount.class?"Credit Card":"Debit Card"));
return log;
}
} while(true);
}
public void operate(Account a){
Scanner scan=new Scanner(System.in);
int
state=-1;
do {
System.out.print("Please enter the command 1. Withdraw 2. Deposit 3. Exit 0. Balance inquiry: ");
p>try {
state=Integer.parseInt(scan.next().trim());
if(state!=1amp;amp;state!= 2amp;amp;state!=3amp;amp;state!=0)
throw new Exception();
}
catch (Exception e) {
System.out.println("Illegal character or command input error");
continue;
}
if(state ==0){
System.out.println(balanceStr(a));
}
else if(state==1){
double money=0;
do {
System.out.print("Please enter the withdrawal amount: ");
try {
money=Double.parseDouble(scan.next().trim());
if(moneylt;=0)
throw new Exception() ;
}
catch (Exception e) {
System.out.println("The amount format is wrong or unreasonable (lt;=0)") ;
}
} while (moneylt;=0);
if(a.withdraw(money)==0){
System.out.println("Sorry, your balance is insufficient, please re-enter");
}
else System.out.println("Withdrawal successful," balanceStr (a));
}
else if(state==2){
double money=0;
do {
System.out.print("Please enter the deposit amount: ");
try {
money=Double.parseDouble(scan.next(). trim());
if(moneylt;=0)
throw new Exception();
}
catch (Exception e) {
System.out.println
("The amount format is incorrect or unreasonable (lt;=0)");
}
} while (moneylt;=0);
a. deposit(money);
System.out.println("Deposit successful," balanceStr(a));
}
} while(state!= 3);
System.out.println(a.getName() "Exited successfully.");
}
}