[Manan] ADD:Created a bank management system and implemented use of subclass

Author: mananguptamg

BankAccountManagement.java

@@ -0,0 +1,46 @@
+public class BankAccountManagement {
+    public static class BankAccount {
+        public String accountNumber;
+        protected String accountHolder;
+        private double balance;
+
+        public BankAccount(String accountNumber, String accountHolder, double balance) {
+            this.accountNumber = accountNumber;
+            this.accountHolder = accountHolder;
+            this.balance = balance;
+        }
+
+        public double getBalance() {
+            return balance;
+        }
+
+        public void setBalance(double balance) {
+            this.balance = balance;
+        }
+    }
+
+    public static class SavingsAccount extends BankAccount {
+        public SavingsAccount(String accountNumber, String accountHolder, double balance) {
+            super(accountNumber, accountHolder, balance);
+        }
+
+        public void displayAccountDetails() {
+            System.out.println("Account Number: " + accountNumber + ", Account Holder: " + accountHolder + ", Balance: " + getBalance());
+        }
+    }
+
+    public static void main(String[] args) {
+        BankAccount account = new BankAccount("123456789", "Manan", 5000.0);
+        System.out.println("Original Balance: " + account.getBalance());
+        account.setBalance(6000.0);
+        System.out.println("Updated Balance: " + account.getBalance());
+
+        SavingsAccount savingsAccount = new SavingsAccount("987654321", "Naman", 8000.0);
+        savingsAccount.displayAccountDetails();
+    }
+}
+
+// Sample Output
+//Original Balance: 5000.0
+//Updated Balance: 6000.0
+//Account Number: 987654321, Account Holder: Naman, Balance: 8000.0