java使用一种方法从银行帐户中取款
使用Java方法构建基本银行帐户。我正在创造一种从银行账户中提款的新方法。这是我现在想到的代码，但在netbeans上它显示出有错误
我创建了一个名为退出的新方法。下面的代码用于从帐户中提款，并且不允许帐户中的余额低于零
private static void withDrawal()
{
int accountIndex = findAccount();
int verifyPin = checkPin (!=0);
if(accountIndex != -1)
if(verifyPin !=-2)
{
accounts[accountIndex].withDrawal();
accounts[verifyPin].checkPin();
int withDra = input.nextInt();
}
else
{
System.out.println("Account does not exist!");
System.out.printf("Enter amount you want to withdraw: ");
}
}
Java文件
package grossmontbank;
import java.util.Scanner;
public class GrossmontBank
{
//class variables (global - accessible throughout this class)
//scanner object to be used throughout
private static Scanner input = new Scanner(System.in);
//array of blank accounts
private static final int MAX_ACCOUNTS = 50;
private static Account[] accounts = new Account[MAX_ACCOUNTS];
//total accounts created
private static int totalAccounts = 0;
//main class mimics a bank teller
public static void main(String[] args)
{
char choice;
//loop until 'Q' is entered
do
{
choice = getChoice(); //getChoice() will only return with a C, B, W, D or Q
if(choice != 'Q')
{
switch(choice)
{
case 'C': createAccount();
break;
case 'B': checkBalance();
break;
case 'W':
break;
case 'D':
break;
}
}
}while(choice != 'Q');
closeBank(); //outputs all account holders and 'closes' the bank
}
/*method checkBalance calls method findAccount()
* if account exists, calls Account method checkBalance()
*/
private static void checkBalance()
{
int accountIndex = findAccount();
//findAccount() returns index of account if found, -1 if not found
if(accountIndex != -1)
{
accounts[accountIndex].checkBalance();
}
else
{
System.out.println("Account does not exist");
}
}
/*method checkIfExists determines if account holder already exists
* returns true if account holder exists, false otherwise
*/
private static boolean checkIfExists(String firstName, String lastName)
{
//loops through account array to see if account name already exists
for(int i = 0; i < totalAccounts;i++)
{
//compares the names, ignoring upper/lower
if(accounts[i].getFirstName().equalsIgnoreCase(firstName)
&& accounts[i].getLastName().equalsIgnoreCase(lastName))
{
System.out.println("Account holder already exists. Please verify and re-enter. ");
return true;
}
}
return false;
}
/*method closeBank prints out closing statement
* prints out list of all account holders
*/
private static void closeBank()
{
System.out.println("Closing the follow accounts:");
for(int i = 0; i < totalAccounts;i++)
{
//printing an account object invokes the Account class method toString()
//prints first and last name only
System.out.printf(" %s%n",accounts[i]);
}
System.out.println("Grossmont Bank is officially closed.");
}
/*method createAccount creates a single bank account
* checks to ensure account holder does not already exist
* returns Account object
*/
private static void createAccount()
{
String first, last, initial;
boolean exists = false;
//only create a new account if MAX_ACCOUNTS has not been reached
if(totalAccounts < MAX_ACCOUNTS )
{
//loop until a new account name has been entered
do
{
System.out.print("Enter your first name: ");
first = input.next();
System.out.print("Enter your last name: ");
last = input.next();
exists = checkIfExists(first,last);
}while(exists == true);
System.out.print("Will you be making an initial deposit? Enter Yes or No: ");
initial = input.next();
//if no initial deposit, call 2 parameter constructor, otherwise call 3 param one
if(initial.equals("No"))
{
accounts[totalAccounts] = new Account(first,last);
}
else
{
System.out.print("Enter initial deposit amount: ");
accounts[totalAccounts] = new Account(first,last, input.nextDouble());
}
//increment totalAccounts created (used throughout program)
totalAccounts++;
}
else
{
System.out.println("Maximum number of accounts has been reached. ");
}
}
/*method findAccount asks for first and last name
* searchs for account holder in array
* if exists, returns array index of this account
* if doesn't exist, returns '-1'
* called from checkBalance()
*/
private static int findAccount()
{
String first, last;
System.out.print("Enter first name: ");
first = input.next();
System.out.print("Enter last name: ");
last = input.next();
//loops through account array
for(int i = 0; i < totalAccounts;i++)
{
//compares the names, ignoring upper/lower
if(accounts[i].getFirstName().equalsIgnoreCase(first)
&& accounts[i].getLastName().equalsIgnoreCase(last))
{
return i; //returns the index of the account
}
}
return -1; //if account not found
}
/* method getChoice() outputs options
* inputs choice from user and validates
* returns choice char
*/
private static char getChoice()
{
char choice;
//output menu options
System.out.println();
System.out.println("Welcome to Grossmont Bank. Choose from the following options: ");
System.out.println(" C - create new account");
System.out.println(" B - check your balance");
System.out.println(" D - deposit");
System.out.println(" W - withdrawal");
System.out.println(" Q - quit");
//loop until a valid input is entered
do
{
System.out.print("Enter choice: ");
choice = input.next().charAt(0);
//if choice is one of the options, return it. Otherwise keep looping
if(choice == 'C' || choice == 'B' || choice == 'D' || choice == 'W' || choice == 'Q')
return choice;
else
{
System.out.println("Invalid choice. Ensure a capital letter. Please re-enter.");
choice = '?';
}
}while(choice == '?');
return choice; //will never get here, but required to have a return statement to compile
}
private static void withDrawal()
{
int accountIndex = findAccount();
int verifyPin = checkPin (!=0);
if(accountIndex != -1)
if(verifyPin !=-2)
{
accounts[accountIndex].withDrawal();
accounts[verifyPin].checkPin();
int withDra = input.nextInt();
}
else
{
System.out.println("Account does not exist!");
System.out.printf("Enter amount you want to withdraw: ");
}
}
}
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