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| 1 | +import java.util.HashMap; |
| 2 | +import java.util.Map; |
| 3 | +import java.util.Scanner; |
| 4 | + |
| 5 | +class Bank { |
| 6 | + private Map<String, Account> accounts; |
| 7 | + |
| 8 | + public Bank() { |
| 9 | + this.accounts = new HashMap<>(); |
| 10 | + } |
| 11 | + |
| 12 | + public void addAccount(String accountNumber, String customerName, double balance) { |
| 13 | + Account account = new Account(accountNumber, customerName, balance); |
| 14 | + accounts.put(accountNumber, account); |
| 15 | + } |
| 16 | + |
| 17 | + public void displayAccountInfo(String accountNumber) { |
| 18 | + if (accounts.containsKey(accountNumber)) { |
| 19 | + Account account = accounts.get(accountNumber); |
| 20 | + System.out.println("Account Number: " + account.getAccountNumber()); |
| 21 | + System.out.println("Customer Name: " + account.getCustomerName()); |
| 22 | + System.out.println("Balance: $" + account.getBalance()); |
| 23 | + } else { |
| 24 | + System.out.println("Account not found!"); |
| 25 | + } |
| 26 | + } |
| 27 | + |
| 28 | + public void performTransaction(String accountNumber, double amount) { |
| 29 | + if (accounts.containsKey(accountNumber)) { |
| 30 | + Account account = accounts.get(accountNumber); |
| 31 | + account.deposit(amount); |
| 32 | + System.out.println("Transaction successful. Updated balance: $" + account.getBalance()); |
| 33 | + } else { |
| 34 | + System.out.println("Account not found!"); |
| 35 | + } |
| 36 | + } |
| 37 | +} |
| 38 | + |
| 39 | +class Account { |
| 40 | + private String accountNumber; |
| 41 | + private String customerName; |
| 42 | + private double balance; |
| 43 | + |
| 44 | + public Account(String accountNumber, String customerName, double balance) { |
| 45 | + this.accountNumber = accountNumber; |
| 46 | + this.customerName = customerName; |
| 47 | + this.balance = balance; |
| 48 | + } |
| 49 | + |
| 50 | + public String getAccountNumber() { |
| 51 | + return accountNumber; |
| 52 | + } |
| 53 | + |
| 54 | + public String getCustomerName() { |
| 55 | + return customerName; |
| 56 | + } |
| 57 | + |
| 58 | + public double getBalance() { |
| 59 | + return balance; |
| 60 | + } |
| 61 | + |
| 62 | + public void deposit(double amount) { |
| 63 | + balance += amount; |
| 64 | + } |
| 65 | +} |
| 66 | + |
| 67 | +public class BankingSystem { |
| 68 | + public static void main(String[] args) { |
| 69 | + Bank bank = new Bank(); |
| 70 | + |
| 71 | + // Adding a few accounts |
| 72 | + bank.addAccount("101", "John Doe", 1000.0); |
| 73 | + bank.addAccount("102", "Jane Smith", 1500.0); |
| 74 | + |
| 75 | + // Performing transactions |
| 76 | + bank.performTransaction("101", 500.0); |
| 77 | + bank.performTransaction("103", 200.0); // This account doesn't exist |
| 78 | + |
| 79 | + // Displaying account information |
| 80 | + bank.displayAccountInfo("101"); |
| 81 | + bank.displayAccountInfo("102"); |
| 82 | + } |
| 83 | +} |
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