Added a Basic_Bank_System

Basic_Bank_System/Basic_Bank_System.java

@@ -0,0 +1,83 @@
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Scanner;
+
+class Bank {
+    private Map<String, Account> accounts;
+
+    public Bank() {
+        this.accounts = new HashMap<>();
+    }
+
+    public void addAccount(String accountNumber, String customerName, double balance) {
+        Account account = new Account(accountNumber, customerName, balance);
+        accounts.put(accountNumber, account);
+    }
+
+    public void displayAccountInfo(String accountNumber) {
+        if (accounts.containsKey(accountNumber)) {
+            Account account = accounts.get(accountNumber);
+            System.out.println("Account Number: " + account.getAccountNumber());
+            System.out.println("Customer Name: " + account.getCustomerName());
+            System.out.println("Balance: $" + account.getBalance());
+        } else {
+            System.out.println("Account not found!");
+        }
+    }
+
+    public void performTransaction(String accountNumber, double amount) {
+        if (accounts.containsKey(accountNumber)) {
+            Account account = accounts.get(accountNumber);
+            account.deposit(amount);
+            System.out.println("Transaction successful. Updated balance: $" + account.getBalance());
+        } else {
+            System.out.println("Account not found!");
+        }
+    }
+}
+
+class Account {
+    private String accountNumber;
+    private String customerName;
+    private double balance;
+
+    public Account(String accountNumber, String customerName, double balance) {
+        this.accountNumber = accountNumber;
+        this.customerName = customerName;
+        this.balance = balance;
+    }
+
+    public String getAccountNumber() {
+        return accountNumber;
+    }
+
+    public String getCustomerName() {
+        return customerName;
+    }
+
+    public double getBalance() {
+        return balance;
+    }
+
+    public void deposit(double amount) {
+        balance += amount;
+    }
+}
+
+public class BankingSystem {
+    public static void main(String[] args) {
+        Bank bank = new Bank();
+
+        // Adding a few accounts
+        bank.addAccount("101", "John Doe", 1000.0);
+        bank.addAccount("102", "Jane Smith", 1500.0);
+
+        // Performing transactions
+        bank.performTransaction("101", 500.0);
+        bank.performTransaction("103", 200.0); // This account doesn't exist
+
+        // Displaying account information
+        bank.displayAccountInfo("101");
+        bank.displayAccountInfo("102");
+    }
+}