From 45d50ff7f0840ef7d7b1e7ccd3e383256e0a9fd7 Mon Sep 17 00:00:00 2001
From: Thuita14 <165817506+Thuita14@users.noreply.github.com>
Date: Thu, 12 Dec 2024 00:04:16 +0300
Subject: [PATCH 01/22] Create Assignment_I_Advanced_Programming

---
 Assignment_I_Advanced_Programming | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 Assignment_I_Advanced_Programming

diff --git a/Assignment_I_Advanced_Programming b/Assignment_I_Advanced_Programming
new file mode 100644
index 0000000..28a2368
--- /dev/null
+++ b/Assignment_I_Advanced_Programming
@@ -0,0 +1 @@
+Assignment_1_Advanced_Programming. 

From 0638fc9236864adca82d4fa7285f38faba232580 Mon Sep 17 00:00:00 2001
From: Thuita14 <165817506+Thuita14@users.noreply.github.com>
Date: Thu, 12 Dec 2024 00:06:11 +0300
Subject: [PATCH 02/22] Delete Assignment_I_Advanced_Programming

---
 Assignment_I_Advanced_Programming | 1 -
 1 file changed, 1 deletion(-)
 delete mode 100644 Assignment_I_Advanced_Programming

diff --git a/Assignment_I_Advanced_Programming b/Assignment_I_Advanced_Programming
deleted file mode 100644
index 28a2368..0000000
--- a/Assignment_I_Advanced_Programming
+++ /dev/null
@@ -1 +0,0 @@
-Assignment_1_Advanced_Programming. 

From b38f0c438aa2864bce93f4629214f39216ab8680 Mon Sep 17 00:00:00 2001
From: Thuita14 <165817506+Thuita14@users.noreply.github.com>
Date: Thu, 12 Dec 2024 00:17:30 +0300
Subject: [PATCH 03/22] Create temp

---
 Assignment_I_Advanced_Programming/temp | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 Assignment_I_Advanced_Programming/temp

diff --git a/Assignment_I_Advanced_Programming/temp b/Assignment_I_Advanced_Programming/temp
new file mode 100644
index 0000000..c5b3a98
--- /dev/null
+++ b/Assignment_I_Advanced_Programming/temp
@@ -0,0 +1 @@
+Assignment 1 Advanced Programming

From c6a3079531034f05b726217a5650a6d63efec7f5 Mon Sep 17 00:00:00 2001
From: Thuita14 <165817506+Thuita14@users.noreply.github.com>
Date: Thu, 12 Dec 2024 00:37:46 +0300
Subject: [PATCH 04/22] Create Withdrawal

---
 Assignment_I_Advanced_Programming/Q2/Withdrawal | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 Assignment_I_Advanced_Programming/Q2/Withdrawal

diff --git a/Assignment_I_Advanced_Programming/Q2/Withdrawal b/Assignment_I_Advanced_Programming/Q2/Withdrawal
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/Assignment_I_Advanced_Programming/Q2/Withdrawal
@@ -0,0 +1 @@
+

From 3c6897532d0e85a687cc65d7b2ed99f249bf1d2b Mon Sep 17 00:00:00 2001
From: Thuita14 <165817506+Thuita14@users.noreply.github.com>
Date: Thu, 12 Dec 2024 00:39:10 +0300
Subject: [PATCH 05/22] Add files via upload

---
 .../Q2/WithdrawalTransaction.java             | 63 +++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 Assignment_I_Advanced_Programming/Q2/WithdrawalTransaction.java

diff --git a/Assignment_I_Advanced_Programming/Q2/WithdrawalTransaction.java b/Assignment_I_Advanced_Programming/Q2/WithdrawalTransaction.java
new file mode 100644
index 0000000..e929ce4
--- /dev/null
+++ b/Assignment_I_Advanced_Programming/Q2/WithdrawalTransaction.java
@@ -0,0 +1,63 @@
+import java.util.Calendar;
+
+public class WithdrawalTransaction extends BaseTransaction {
+    private boolean reversed = false;  // Track if the transaction has been reversed
+    private BankAccount appliedAccount; // Keep track of the account this transaction was applied to
+
+    public WithdrawalTransaction(double amount, Calendar date) {
+        super(amount, date);
+    }
+
+    @Override
+    public void apply(BankAccount ba) {
+        if (getAmount() <= ba.getBalance()) {
+            ba.withdraw(getAmount());
+            appliedAccount = ba; // Store the account for potential reversal
+            System.out.println("Withdrawal of " + getAmount() + " applied.");
+        } else {
+            System.out.println("Insufficient funds for withdrawal.");
+        }
+    }
+
+    public boolean reverse() {
+        if (reversed) {
+            System.out.println("Transaction has already been reversed.");
+            return false;
+        }
+
+        if (appliedAccount != null) {
+            appliedAccount.deposit(getAmount());
+            reversed = true;
+            System.out.println("Withdrawal transaction reversed. Amount " + getAmount() + " restored.");
+            return true;
+        } else {
+            System.out.println("Transaction was not applied to any account; cannot reverse.");
+            return false;
+        }
+    }
+
+public class TransactionTest {
+    public static void main(String[] args) {
+        // Create a bank account with an initial balance
+        BankAccount account = new BankAccount(5000);
+
+        // Create a withdrawal transaction
+        Calendar withdrawalDate = Calendar.getInstance();
+        WithdrawalTransaction withdrawal = new WithdrawalTransaction(1500, withdrawalDate);
+
+        // Apply withdrawal transaction
+        System.out.println("Before transaction: " + account);
+        withdrawal.apply(account);
+        System.out.println("After withdrawal: " + account);
+
+        // Reverse the withdrawal
+        boolean success = withdrawal.reverse();
+        if (success) {
+            System.out.println("After reversal: " + account);
+        }
+
+        // Attempt to reverse again
+        withdrawal.reverse();
+    }
+}
+}
\ No newline at end of file

From a8eba893386cd9ee61bc5aa586bc9371cb0a2297 Mon Sep 17 00:00:00 2001
From: Thuita14 <165817506+Thuita14@users.noreply.github.com>
Date: Thu, 12 Dec 2024 00:39:54 +0300
Subject: [PATCH 06/22] Delete Assignment_I_Advanced_Programming/Q2/Withdrawal

---
 Assignment_I_Advanced_Programming/Q2/Withdrawal | 1 -
 1 file changed, 1 deletion(-)
 delete mode 100644 Assignment_I_Advanced_Programming/Q2/Withdrawal

diff --git a/Assignment_I_Advanced_Programming/Q2/Withdrawal b/Assignment_I_Advanced_Programming/Q2/Withdrawal
deleted file mode 100644
index 8b13789..0000000
--- a/Assignment_I_Advanced_Programming/Q2/Withdrawal
+++ /dev/null
@@ -1 +0,0 @@
-

From 56d48d9194fabb7f2d821d99a4743f441151c100 Mon Sep 17 00:00:00 2001
From: Thuita14 <165817506+Thuita14@users.noreply.github.com>
Date: Thu, 12 Dec 2024 00:41:56 +0300
Subject: [PATCH 07/22] Delete Assignment_I_Advanced_Programming/temp

---
 Assignment_I_Advanced_Programming/temp | 1 -
 1 file changed, 1 deletion(-)
 delete mode 100644 Assignment_I_Advanced_Programming/temp

diff --git a/Assignment_I_Advanced_Programming/temp b/Assignment_I_Advanced_Programming/temp
deleted file mode 100644
index c5b3a98..0000000
--- a/Assignment_I_Advanced_Programming/temp
+++ /dev/null
@@ -1 +0,0 @@
-Assignment 1 Advanced Programming

From c2cc4def3ccc494148bf2b4eeb8c7c3709cedf91 Mon Sep 17 00:00:00 2001
From: Thuita14 <165817506+Thuita14@users.noreply.github.com>
Date: Thu, 12 Dec 2024 00:43:26 +0300
Subject: [PATCH 08/22] Exception Handling and Client Codes

---
 .../Q3/Exception Handling and Client Codes                       | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 Assignment_I_Advanced_Programming/Q3/Exception Handling and Client Codes

diff --git a/Assignment_I_Advanced_Programming/Q3/Exception Handling and Client Codes b/Assignment_I_Advanced_Programming/Q3/Exception Handling and Client Codes
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/Assignment_I_Advanced_Programming/Q3/Exception Handling and Client Codes	
@@ -0,0 +1 @@
+

From 07083a406eb8dd8a83b1a4b7669ca3d9bd583395 Mon Sep 17 00:00:00 2001
From: Thuita14 <165817506+Thuita14@users.noreply.github.com>
Date: Thu, 12 Dec 2024 00:46:38 +0300
Subject: [PATCH 09/22] Add files via upload

---
 .../Q3/InsufficientFundsException.java        | 67 +++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 Assignment_I_Advanced_Programming/Q3/InsufficientFundsException.java

diff --git a/Assignment_I_Advanced_Programming/Q3/InsufficientFundsException.java b/Assignment_I_Advanced_Programming/Q3/InsufficientFundsException.java
new file mode 100644
index 0000000..24d04c7
--- /dev/null
+++ b/Assignment_I_Advanced_Programming/Q3/InsufficientFundsException.java
@@ -0,0 +1,67 @@
+package Lecture4_interfaces_abstract_classes;
+import org.jetbrains.annotations.NotNull;
+import java.util.Calendar;
+
+public class InsufficientFundsException extends Exception {
+    public InsufficientFundsException(String message) {
+        super(message);
+    }
+}
+
+public class WithdrawalTransaction extends BaseTransaction {
+    private boolean reversed = false;
+    private BankAccount appliedAccount;
+    private double remainingAmount = 0.0; // Keeps track of the amount not withdrawn
+
+    public WithdrawalTransaction(double amount, Calendar date) {
+        super(amount, date);
+    }
+
+    @Override
+    public void apply(BankAccount ba) throws InsufficientFundsException {
+        if (getAmount() > ba.getBalance()) {
+            throw new InsufficientFundsException("Insufficient funds. Transaction failed.");
+        } else if (ba.getBalance() <= 0) {
+            throw new InsufficientFundsException("Account balance is zero or negative. Cannot proceed.");
+        } else {
+            ba.withdraw(getAmount());
+            appliedAccount = ba;
+            System.out.println("Withdrawal of " + getAmount() + " applied.");
+        }
+    }
+
+    // Overloaded apply() method
+    public void apply(BankAccount ba, boolean partialWithdrawal) {
+        try {
+            if (partialWithdrawal && ba.getBalance() > 0 && ba.getBalance() < getAmount()) {
+                remainingAmount = getAmount() - ba.getBalance();
+                System.out.println("Partial withdrawal applied. Remaining amount: " + remainingAmount);
+                ba.withdraw(ba.getBalance());
+                appliedAccount = ba;
+            } else {
+                apply(ba); // Call the original apply method
+            }
+        } catch (InsufficientFundsException e) {
+            System.out.println("Exception: " + e.getMessage());
+        } finally {
+            System.out.println("Transaction process completed.");
+        }
+    }
+
+    public boolean reverse() {
+        if (reversed) {
+            System.out.println("Transaction has already been reversed.");
+            return false;
+        }
+
+        if (appliedAccount != null) {
+            appliedAccount.deposit(getAmount() - remainingAmount);
+            reversed = true;
+            System.out.println("Withdrawal transaction reversed. Amount " + (getAmount() - remainingAmount) + " restored.");
+            return true;
+        } else {
+            System.out.println("Transaction was not applied to any account; cannot reverse.");
+            return false;
+        }
+    }
+}

From 6558cac66c7f2af16f94277a083c65fec61d42bd Mon Sep 17 00:00:00 2001
From: Thuita14 <165817506+Thuita14@users.noreply.github.com>
Date: Thu, 12 Dec 2024 00:47:33 +0300
Subject: [PATCH 10/22] Exception Handling and Client Codes

---
 .../Q3/Exception Handling and Client Codes                       | 1 -
 1 file changed, 1 deletion(-)
 delete mode 100644 Assignment_I_Advanced_Programming/Q3/Exception Handling and Client Codes

diff --git a/Assignment_I_Advanced_Programming/Q3/Exception Handling and Client Codes b/Assignment_I_Advanced_Programming/Q3/Exception Handling and Client Codes
deleted file mode 100644
index 8b13789..0000000
--- a/Assignment_I_Advanced_Programming/Q3/Exception Handling and Client Codes	
+++ /dev/null
@@ -1 +0,0 @@
-

From 7cf12ab541f207aee5c0027c8ce16a72869d26d7 Mon Sep 17 00:00:00 2001
From: Thuita14 <165817506+Thuita14@users.noreply.github.com>
Date: Thu, 12 Dec 2024 00:50:15 +0300
Subject: [PATCH 11/22] Create Client Code

---
 Assignment_I_Advanced_Programming/Q4/Client Code | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 Assignment_I_Advanced_Programming/Q4/Client Code

diff --git a/Assignment_I_Advanced_Programming/Q4/Client Code b/Assignment_I_Advanced_Programming/Q4/Client Code
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/Assignment_I_Advanced_Programming/Q4/Client Code	
@@ -0,0 +1 @@
+

From 3acafc78d898e81656c41285501b2c89132d1d86 Mon Sep 17 00:00:00 2001
From: Thuita14 <165817506+Thuita14@users.noreply.github.com>
Date: Thu, 12 Dec 2024 00:51:02 +0300
Subject: [PATCH 12/22] Add files via upload

---
 .../Q4/Main.java                              | 63 +++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 Assignment_I_Advanced_Programming/Q4/Main.java

diff --git a/Assignment_I_Advanced_Programming/Q4/Main.java b/Assignment_I_Advanced_Programming/Q4/Main.java
new file mode 100644
index 0000000..7d66406
--- /dev/null
+++ b/Assignment_I_Advanced_Programming/Q4/Main.java
@@ -0,0 +1,63 @@
+package Lecture4_interfaces_abstract_classes;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Calendar;
+
+public class Main {
+    public static void main(String[] args) {
+        // Create a BankAccount with an initial balance
+        BankAccount account = new BankAccount(5000);
+
+        // Create a DepositTransaction
+        Calendar depositDate = Calendar.getInstance();
+        DepositTransaction deposit = new DepositTransaction(2000, depositDate);
+
+        // Create a WithdrawalTransaction
+        Calendar withdrawalDate = Calendar.getInstance();
+        WithdrawalTransaction withdrawal = new WithdrawalTransaction(3000, withdrawalDate);
+
+        // Test DepositTransaction (Directly)
+        System.out.println("Testing DepositTransaction:");
+        System.out.println("Before deposit: " + account);
+        deposit.apply(account);
+        System.out.println("After deposit: " + account);
+        deposit.printTransactionDetails();
+
+        // Test WithdrawalTransaction (Directly)
+        System.out.println("\nTesting WithdrawalTransaction:");
+        System.out.println("Before withdrawal: " + account);
+        try {
+            withdrawal.apply(account);
+        } catch (InsufficientFundsException e) {
+            System.out.println("Exception caught: " + e.getMessage());
+        }
+        System.out.println("After withdrawal: " + account);
+        withdrawal.printTransactionDetails();
+
+        // Test BaseTransaction behavior (Type casting)
+        System.out.println("\nTesting BaseTransaction behavior using type casting:");
+        BaseTransaction baseDeposit = (BaseTransaction) deposit; // Upcasting
+        BaseTransaction baseWithdrawal = (BaseTransaction) withdrawal; // Upcasting
+
+        // Using BaseTransaction references
+        System.out.println("Testing apply() on BaseTransaction reference:");
+        System.out.println("Before base deposit: " + account);
+        baseDeposit.apply(account); // Polymorphic call
+        System.out.println("After base deposit: " + account);
+
+        System.out.println("Before base withdrawal: " + account);
+        try {
+            baseWithdrawal.apply(account); // Polymorphic call
+        } catch (InsufficientFundsException e) {
+            System.out.println("Exception caught: " + e.getMessage());
+        }
+        System.out.println("After base withdrawal: " + account);
+
+        // Reversal Test
+        System.out.println("\nTesting reversal functionality:");
+        withdrawal.reverse();
+        System.out.println("After reversal: " + account);
+    }
+}
+

From 48cd2493dd9323906145603ba5e0e7f77315ba75 Mon Sep 17 00:00:00 2001
From: Thuita14 <165817506+Thuita14@users.noreply.github.com>
Date: Thu, 12 Dec 2024 00:51:53 +0300
Subject: [PATCH 13/22] Writing Client Code

---
 Assignment_I_Advanced_Programming/Q4/Client Code | 1 -
 1 file changed, 1 deletion(-)
 delete mode 100644 Assignment_I_Advanced_Programming/Q4/Client Code

diff --git a/Assignment_I_Advanced_Programming/Q4/Client Code b/Assignment_I_Advanced_Programming/Q4/Client Code
deleted file mode 100644
index 8b13789..0000000
--- a/Assignment_I_Advanced_Programming/Q4/Client Code	
+++ /dev/null
@@ -1 +0,0 @@
-

From 419b34460b76f9cd343b882e743f63cb6df11f25 Mon Sep 17 00:00:00 2001
From: Thuita14 <165817506+Thuita14@users.noreply.github.com>
Date: Thu, 12 Dec 2024 00:52:19 +0300
Subject: [PATCH 14/22] Create temp

---
 Assignment_I_Advanced_Programming/Q1/temp | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 Assignment_I_Advanced_Programming/Q1/temp

diff --git a/Assignment_I_Advanced_Programming/Q1/temp b/Assignment_I_Advanced_Programming/Q1/temp
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/Assignment_I_Advanced_Programming/Q1/temp
@@ -0,0 +1 @@
+

From 1ffbadb4924a03bb87f1bf1f7bbd6044a7c36baf Mon Sep 17 00:00:00 2001
From: Thuita14 <165817506+Thuita14@users.noreply.github.com>
Date: Thu, 12 Dec 2024 01:09:04 +0300
Subject: [PATCH 15/22] Extending Interface in Concrete Class

---
 .../Q1/BankAccount.java                       |  16 +++
 .../Q1/BaseTransaction.java                   | 124 ++++++++++++++++++
 .../Q1/DepositTransaction.java                |  30 +++++
 .../Q1/TransactionInterface.java              |  21 +++
 4 files changed, 191 insertions(+)
 create mode 100644 Assignment_I_Advanced_Programming/Q1/BankAccount.java
 create mode 100644 Assignment_I_Advanced_Programming/Q1/BaseTransaction.java
 create mode 100644 Assignment_I_Advanced_Programming/Q1/DepositTransaction.java
 create mode 100644 Assignment_I_Advanced_Programming/Q1/TransactionInterface.java

diff --git a/Assignment_I_Advanced_Programming/Q1/BankAccount.java b/Assignment_I_Advanced_Programming/Q1/BankAccount.java
new file mode 100644
index 0000000..74f3877
--- /dev/null
+++ b/Assignment_I_Advanced_Programming/Q1/BankAccount.java
@@ -0,0 +1,16 @@
+package Lecture4_interfaces_abstract_classes;
+
+public class BankAccount {
+    private double balance;
+    public BankAccount(double balance) {
+        this.balance = balance;
+    }
+
+    public double getBalance() {
+        return balance;
+    }
+
+    public void setBalance(double balance) {
+        this.balance = balance;
+    }
+}
\ No newline at end of file
diff --git a/Assignment_I_Advanced_Programming/Q1/BaseTransaction.java b/Assignment_I_Advanced_Programming/Q1/BaseTransaction.java
new file mode 100644
index 0000000..0c1f61d
--- /dev/null
+++ b/Assignment_I_Advanced_Programming/Q1/BaseTransaction.java
@@ -0,0 +1,124 @@
+package Lecture4_interfaces_abstract_classes;
+
+//import org.jetbrains.annotations.NotNull;
+import java.util. UUID;
+import java.util.Calendar;
+
+
+public interface TransactionInterface{
+    double getAmount();
+    Calendar getDate();
+    String getTransactionID();
+    void printTransactionDetails();
+    void apply(BankAccount ba);
+}
+
+public abstract class BaseTransaction implements TransactionInterface{
+    private double amount;
+    private Calendar date;
+    private String transactionID;
+
+    public BaseTransaction(double amount, Calendar date){
+        this.amount = amount;
+        this.date = date;
+       // int uniq = (int) (Math.random() * 1000000);
+        this.transactionID = UUID.randomUUID().toString();//Generates a unique ID
+}
+
+@Override
+public double getAmount(){
+    return amount;
+}
+
+@Override
+public Calendar getDate(){
+    return date;
+}
+@Override
+public String getTransactionID(){
+    return transactionID;
+}
+@Override
+public void printTransactionDetails(){
+    System.out.println("Transaction ID: " + transactionID);
+    System.out.println("Amount: " + amount);
+    System.out.println("Date: " + date.getTime());
+}
+
+@Override
+public void apply(BankAccount ba){
+    System.out.println("Applying transaction to bank account...");
+}
+}
+
+public class BankAccount{
+    private double balance;
+
+    public BankAccount(double initialBalance){
+        this.balance = initialBalance;
+    }
+    public double getBalance(){
+        return balance;
+    }
+    public void deposit(double amount){
+        balance += amount;
+    }
+    public void withdraw(double amount){
+        if(amount <= balance){
+            balance -= amount;
+            }else{
+        System.out.println("Insufficient funds!");
+        }
+    }
+    @Override
+    public String toString(){
+        return "BankAccount balance: " + balance;
+    }
+}
+
+public class DepositTransaction extends BaseTransaction{
+    public DepositTransaction(double amount, Calendar date){
+        super(amount, date);
+    }
+
+    @Override
+    public void apply(BankAccount ba){
+        ba.deposit(getAmount());
+        System.out.println("Deposit of" + getAmount() + "applied to bank account.");
+    }
+}
+
+public class WithdrawalTransaction extends BaseTransaction{
+    public WithdrawalTransaction(double amount, Calendar date){
+        super(amount, date);
+    }
+
+    @Override
+    public void apply(BankAccount ba){
+        ba.withdraw(getAmount());
+        System.out.println("Withdraw of " + getAmount() + "applied to bank account.");
+    }
+}
+
+public class TransactionTest{
+
+    public static void main(String[]args){
+        BankAccount account = new BankAccount(2000);
+
+        Calendar depositDate = Calendar.getInstance();
+        DepositTransaction deposit = new DepositTransaction(1000, depositDate);
+
+        Calendar withdrawalDate = Calendar.getInstance();
+        WithdrawalTransaction withdrawal = new WithdrawalTransaction(500, withdrawalDate);
+
+        //Apply Transactions
+        System.out.println("Before transactions: " + account);
+        deposit.apply(account);
+        withdrawal.apply(account);
+        System.out.println("After transactions: " + account);
+
+        //Print transaction details
+        deposit.printTransactionDetails();
+        withdrawal.printTransactionDetails();
+    }
+}
\ No newline at end of file
diff --git a/Assignment_I_Advanced_Programming/Q1/DepositTransaction.java b/Assignment_I_Advanced_Programming/Q1/DepositTransaction.java
new file mode 100644
index 0000000..ff98d51
--- /dev/null
+++ b/Assignment_I_Advanced_Programming/Q1/DepositTransaction.java
@@ -0,0 +1,30 @@
+package Lecture4_interfaces_abstract_classes;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Calendar;
+
+public class DepositTrasaction extends BaseTransaction {
+    public DepositTrasaction(double amount, Calendar date){
+        super(amount, date);
+    }
+    private boolean checkDepositAmount(double  amount){
+        if (amt < 0){
+           return false;
+        }
+        else{
+            return  true;
+        }
+    }
+
+    // Method to print a transaction receipt or details
+    public void printTransactionDetails(){
+        System.out.println("Deposit Transaction: "+this.toString());
+    }
+
+    public void apply(BankAccount ba){
+        double curr_balance = ba.getBalance();
+        double new_balance = curr_balance + getAmount();
+        ba.setBalance(new_balance);
+    }
+}
\ No newline at end of file
diff --git a/Assignment_I_Advanced_Programming/Q1/TransactionInterface.java b/Assignment_I_Advanced_Programming/Q1/TransactionInterface.java
new file mode 100644
index 0000000..887e565
--- /dev/null
+++ b/Assignment_I_Advanced_Programming/Q1/TransactionInterface.java
@@ -0,0 +1,21 @@
+package Lecture4_interfaces_abstract_classes;
+import java.util.Calendar;
+
+/**
+ * Interface for Transactions
+ * Any class that defines a transaction is expected to implement this Interface
+ */
+public interface TransactionInterface {
+
+    // Method to get the transaction amount
+    double getAmount();
+
+    // Method to get the transaction date
+    Calendar getDate();
+
+    // Method to get a unique identifier for the transaction
+    String getTransactionID();
+
+    void printTransactionDetails();
+    void apply(BankAccount ba);
+}
\ No newline at end of file

From d691568ad3a3b9c89f00e1496c29ea65833fb0bb Mon Sep 17 00:00:00 2001
From: Thuita14 <165817506+Thuita14@users.noreply.github.com>
Date: Thu, 12 Dec 2024 01:10:08 +0300
Subject: [PATCH 16/22] Extending Interface in Concrete Class

---
 Assignment_I_Advanced_Programming/Q1/temp | 1 -
 1 file changed, 1 deletion(-)
 delete mode 100644 Assignment_I_Advanced_Programming/Q1/temp

diff --git a/Assignment_I_Advanced_Programming/Q1/temp b/Assignment_I_Advanced_Programming/Q1/temp
deleted file mode 100644
index 8b13789..0000000
--- a/Assignment_I_Advanced_Programming/Q1/temp
+++ /dev/null
@@ -1 +0,0 @@
-

From a7879e0704fa9204034d0f3e6a4fe5408a851452 Mon Sep 17 00:00:00 2001
From: Thuita14 <165817506+Thuita14@users.noreply.github.com>
Date: Thu, 12 Dec 2024 01:19:53 +0300
Subject: [PATCH 17/22] Updated WithdrawalTransaction code


From b12f4c9d0ff9ba79f8038304270f0ee6bda9e6b6 Mon Sep 17 00:00:00 2001
From: Thuita14 <165817506+Thuita14@users.noreply.github.com>
Date: Thu, 12 Dec 2024 01:21:33 +0300
Subject: [PATCH 18/22] Add files via upload

---
 .../Q1/WithdrawalTransaction.java             | 37 +++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 Assignment_I_Advanced_Programming/Q1/WithdrawalTransaction.java

diff --git a/Assignment_I_Advanced_Programming/Q1/WithdrawalTransaction.java b/Assignment_I_Advanced_Programming/Q1/WithdrawalTransaction.java
new file mode 100644
index 0000000..49a31e9
--- /dev/null
+++ b/Assignment_I_Advanced_Programming/Q1/WithdrawalTransaction.java
@@ -0,0 +1,37 @@
+package Lecture4_interfaces_abstract_classes;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Calendar;
+
+public class WithdrawalTransaction extends BaseTransaction {
+    public WithdrawalTransaction(int amount, @NotNull Calendar date) {
+        super(amount, date);
+    }
+
+    private boolean checkDepositAmount(int amt) {
+        if (amt < 0) {
+            return false;
+        } else {
+            return true;
+        }
+    }
+
+    // Method to reverse the transaction
+    public boolean reverse() {
+        return true;
+    } // return true if reversal was successful
+
+    // Method to print a transaction receipt or details
+    public void printTransactionDetails() {
+        System.out.println("Deposit Trasaction: " + this.toString());
+    }
+
+    public void apply(BankAccount ba) {
+        double curr_balance = ba.getBalance();
+        if (curr_balance > getAmount()) {
+            double new_balance = curr_balance - getAmount();
+            ba.setBalance(new_balance);
+        }
+    }
+}

From 3306453621353add075b0c036398fe37ff493cb1 Mon Sep 17 00:00:00 2001
From: Thuita14 <165817506+Thuita14@users.noreply.github.com>
Date: Thu, 12 Dec 2024 01:23:10 +0300
Subject: [PATCH 19/22] Update README.md

---
 README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.md b/README.md
index 99b7168..6e5a95e 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,4 @@
 # Advanced-Programming
 A Repository for Programming Exercises and Assignments in Advanced Programming 
+
+##Assignment_1_Advanced_Programming is the assignment folder

From b88e5c1eac5e340078a5d90d353c688cddc6e554 Mon Sep 17 00:00:00 2001
From: Thuita14 <165817506+Thuita14@users.noreply.github.com>
Date: Thu, 12 Dec 2024 01:23:30 +0300
Subject: [PATCH 20/22] Update README.md

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 6e5a95e..daa727c 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
 # Advanced-Programming
 A Repository for Programming Exercises and Assignments in Advanced Programming 
 
-##Assignment_1_Advanced_Programming is the assignment folder
+## Assignment_1_Advanced_Programming is the assignment folder

From 052eabdabaf8636e3edabd36b4aadc9abde9c0e4 Mon Sep 17 00:00:00 2001
From: Thuita14 <165817506+Thuita14@users.noreply.github.com>
Date: Thu, 12 Dec 2024 01:24:23 +0300
Subject: [PATCH 21/22] Update README.md

---
 README.md | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/README.md b/README.md
index daa727c..fc9c1e9 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,3 @@
 # Advanced-Programming
-A Repository for Programming Exercises and Assignments in Advanced Programming 
-
 ## Assignment_1_Advanced_Programming is the assignment folder
+A Repository for Programming Exercises and Assignments in Advanced Programming 

From 0dad84bde09768486fb2b7956fa14504528ba2fd Mon Sep 17 00:00:00 2001
From: Thuita14 <165817506+Thuita14@users.noreply.github.com>
Date: Thu, 12 Dec 2024 01:25:51 +0300
Subject: [PATCH 22/22] Update README.md

---
 README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.md b/README.md
index fc9c1e9..15342bd 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
+# VICTOR KURIA THUITA 
+# SCT212-0708/2022
 # Advanced-Programming
 ## Assignment_1_Advanced_Programming is the assignment folder
 A Repository for Programming Exercises and Assignments in Advanced Programming