diff --git a/.classpath b/.classpath
index 0cbf9cd..485143e 100644
--- a/.classpath
+++ b/.classpath
@@ -2,5 +2,6 @@
 <classpath>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
 	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="lib" path="lib/json-20210307.jar"/>
 	<classpathentry kind="output" path="bin"/>
 </classpath>
diff --git a/.project b/.project
index 9c3e68a..dfc0bbe 100644
--- a/.project
+++ b/.project
@@ -14,4 +14,15 @@
 	<natures>
 		<nature>org.eclipse.jdt.core.javanature</nature>
 	</natures>
+	<filteredResources>
+		<filter>
+			<id>1743151987451</id>
+			<name></name>
+			<type>30</type>
+			<matcher>
+				<id>org.eclipse.core.resources.regexFilterMatcher</id>
+				<arguments>node_modules|\.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+			</matcher>
+		</filter>
+	</filteredResources>
 </projectDescription>
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..edeafa4
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,5 @@
+{
+  "java.project.referencedLibraries": [
+    "lib/json-20210307.jar"
+  ]
+}
diff --git a/Bank b/Bank
new file mode 100644
index 0000000..08f0dbc
--- /dev/null
+++ b/Bank
@@ -0,0 +1,153 @@
+package Bank;
+import java.io.Serializable;
+import javax.swing.DefaultListModel;
+import Exceptions.AccNotFound;
+import Exceptions.InvalidAmount;
+import Exceptions.MaxBalance;
+import Exceptions.MaxWithdraw;
+
+public class Bank implements Serializable {
+	/**
+	 * 
+	 */
+	private static final long serialVersionUID = 1L;
+	private BankAccount[] accounts= new BankAccount[100];
+	public int addAccount(BankAccount acc)
+	{
+		int i=0;
+		for(i=0;i<100;i++)
+		{
+			if(getAccounts()[i]==null)
+			{
+				break;
+			}
+		}
+		getAccounts()[i]=acc;
+		return i;
+	}
+	
+	public int addAccount(String name, double balance, double maxWithLimit ) throws Exception
+	{
+		SavingsAccount acc=new SavingsAccount(name, balance, maxWithLimit);
+		return this.addAccount(acc);
+	}
+	
+	public int addAccount(String name, double balance, String tradeLicense) throws Exception
+	{
+		CurrentAccount acc = new CurrentAccount(name, balance,tradeLicense);
+		return this.addAccount(acc);
+	}
+	
+	public int addAccount(String name, String  institutionName, double balance, double min_balance) throws Exception
+	{
+		StudentAccount acc= new StudentAccount(name,balance,institutionName);
+		return this.addAccount(acc);
+	}
+	
+	public BankAccount findAccount(String aacountNum)
+	{
+		int i;
+		for(i=0;i<100;i++)
+		{
+			if(getAccounts()[i]==null)
+			{
+				break;
+			}
+			if(getAccounts()[i].acc_num.equals(aacountNum))
+			{
+				return getAccounts()[i];
+			}
+			
+		}
+		return null;
+	}
+	
+	public void deposit(String aacountNum, double amt) throws InvalidAmount,AccNotFound
+	
+	{
+		if(amt<0)
+		{
+			throw new InvalidAmount("Invalid Deposit amount");
+		}
+		BankAccount temp=findAccount(aacountNum);
+		if(temp==null)
+		{
+			throw new AccNotFound("Account Not Found");
+		}
+		if(temp!=null)
+		{
+			temp.deposit(amt);
+			
+		}
+		
+	}
+	
+	
+	public void withdraw(String aacountNum, double amt) throws MaxBalance,AccNotFound, MaxWithdraw, InvalidAmount
+	{
+		BankAccount temp=findAccount(aacountNum);
+		
+		if(temp==null)
+		{
+			throw new AccNotFound("Account Not Found");
+		}
+		
+		if(amt<=0)
+		{
+			throw new InvalidAmount("Invalid Amount");
+		}
+		
+		if(amt>temp.getbalance())
+		{
+			throw new MaxBalance("Insufficient Balance");
+		}
+		if(temp!=null)
+		{
+			temp.withdraw(amt);
+		}
+	}
+	
+	public DefaultListModel<String> display()
+	{
+		DefaultListModel<String> list=new DefaultListModel<String>();
+		int i;
+//		String type=null;
+	
+		for(i=0;i<100;i++)
+		{
+			if(getAccounts()[i]==null)
+			{
+				break;
+			}
+//			if(getAccounts()[i].getClass().toString().equals("class Bank.SavingsAccount"))
+//			{
+//				type="Type: Savings Account";
+//			}
+//			
+//			else if(getAccounts()[i].getClass().toString().equals("class Bank.CurrentAccount"))
+//			{
+//				type="Type: Current Account";
+//			}
+//			
+//			else if(getAccounts()[i].getClass().toString().equals("class Bank.StudentAccount"))
+//			{
+//				type="Type: Student Account";
+//			}
+			
+			list.addElement(getAccounts()[i].toString());
+			
+			
+		}
+		
+		return list;
+	}
+
+	public BankAccount[] getAccounts() {
+		return accounts;
+	}
+
+	public void setAccounts(BankAccount[] accounts) {
+		this.accounts = accounts;
+	}
+	
+}
diff --git a/Bank Class b/Bank Class
new file mode 100644
index 0000000..840fee0
--- /dev/null
+++ b/Bank Class	
@@ -0,0 +1,153 @@
+package Bank;Add commentMore actions
+import java.io.Serializable;
+import javax.swing.DefaultListModel;
+import Exceptions.AccNotFound;
+import Exceptions.InvalidAmount;
+import Exceptions.MaxBalance;
+import Exceptions.MaxWithdraw;
+
+public class Bank implements Serializable {
+	/**
+	 * 
+	 */
+	private static final long serialVersionUID = 1L;
+	private BankAccount[] accounts= new BankAccount[100];
+	public int addAccount(BankAccount acc)
+	{
+		int i=0;
+		for(i=0;i<100;i++)
+		{
+			if(getAccounts()[i]==null)
+			{
+				break;
+			}
+		}
+		getAccounts()[i]=acc;
+		return i;
+	}
+	
+	public int addAccount(String name, double balance, double maxWithLimit ) throws Exception
+	{
+		SavingsAccount acc=new SavingsAccount(name, balance, maxWithLimit);
+		return this.addAccount(acc);
+	}
+	
+	public int addAccount(String name, double balance, String tradeLicense) throws Exception
+	{
+		CurrentAccount acc = new CurrentAccount(name, balance,tradeLicense);
+		return this.addAccount(acc);
+	}
+	
+	public int addAccount(String name, String  institutionName, double balance, double min_balance) throws Exception
+	{
+		StudentAccount acc= new StudentAccount(name,balance,institutionName);
+		return this.addAccount(acc);
+	}
+	
+	public BankAccount findAccount(String aacountNum)
+	{
+		int i;
+		for(i=0;i<100;i++)
+		{
+			if(getAccounts()[i]==null)
+			{
+				break;
+			}
+			if(getAccounts()[i].acc_num.equals(aacountNum))
+			{
+				return getAccounts()[i];
+			}
+			
+		}
+		return null;
+	}
+	
+	public void deposit(String aacountNum, double amt) throws InvalidAmount,AccNotFound
+	
+	{
+		if(amt<0)
+		{
+			throw new InvalidAmount("Invalid Deposit amount");
+		}
+		BankAccount temp=findAccount(aacountNum);
+		if(temp==null)
+		{
+			throw new AccNotFound("Account Not Found");
+		}
+		if(temp!=null)
+		{
+			temp.deposit(amt);
+			
+		}
+		
+	}
+	
+	
+	public void withdraw(String aacountNum, double amt) throws MaxBalance,AccNotFound, MaxWithdraw, InvalidAmount
+	{
+		BankAccount temp=findAccount(aacountNum);
+		
+		if(temp==null)
+		{
+			throw new AccNotFound("Account Not Found");
+		}
+		
+		if(amt<=0)
+		{
+			throw new InvalidAmount("Invalid Amount");
+		}
+		
+		if(amt>temp.getbalance())
+		{
+			throw new MaxBalance("Insufficient Balance");
+		}
+		if(temp!=null)
+		{
+			temp.withdraw(amt);
+		}
+	}
+	
+	public DefaultListModel<String> display()
+	{
+		DefaultListModel<String> list=new DefaultListModel<String>();
+		int i;
+//		String type=null;
+	
+		for(i=0;i<100;i++)
+		{
+			if(getAccounts()[i]==null)
+			{
+				break;
+			}
+//			if(getAccounts()[i].getClass().toString().equals("class Bank.SavingsAccount"))
+//			{
+//				type="Type: Savings Account";
+//			}
+//			
+//			else if(getAccounts()[i].getClass().toString().equals("class Bank.CurrentAccount"))
+//			{
+//				type="Type: Current Account";
+//			}
+//			
+//			else if(getAccounts()[i].getClass().toString().equals("class Bank.StudentAccount"))
+//			{
+//				type="Type: Student Account";
+//			}
+			
+			list.addElement(getAccounts()[i].toString());
+			
+			
+		}
+		
+		return list;
+	}
+
+	public BankAccount[] getAccounts() {
+		return accounts;
+	}
+
+	public void setAccounts(BankAccount[] accounts) {
+		this.accounts = accounts;
+	}
+	
+}
diff --git a/BankAcoount.java b/BankAcoount.java
new file mode 100644
index 0000000..5d3c2ea
--- /dev/null
+++ b/BankAcoount.java
@@ -0,0 +1,63 @@
+package Bank;
+import java.io.Serializable;
+
+import Exceptions.InvalidAmount;
+import Exceptions.MaxBalance;
+import Exceptions.MaxWithdraw;
+
+public class BankAccount implements Serializable {
+
+	/**
+	 * 
+	 */
+	private static final long serialVersionUID = 1L;
+	private String name;
+	private double balance;
+	protected double min_balance;
+	String acc_num;
+	//String type;
+	
+	
+	public BankAccount(String name, double balance, double min_balance) throws Exception {
+    if (balance < min_balance) {
+        throw new Exception("Initial balance cannot be less than the minimum required balance: " + min_balance);
+    }
+    this.name = name;
+    this.balance = balance;
+    this.min_balance = min_balance;
+    this.acc_num = 10000 + (int) (Math.random() * 89999) + "";
+}
+
+
+	public void deposit(double amount) throws InvalidAmount
+	{
+		if (amount <= 0){
+			throw new InvalidAmount("Deposit amount must be greater than zero.");
+		}
+		balance+=amount;
+	}
+	
+	public void withdraw(double amount) throws MaxWithdraw, MaxBalance
+	{
+		if((balance-amount)>=min_balance && amount<balance)
+		{
+			balance-=amount;
+			
+		}
+		
+		else
+		{
+			throw new MaxBalance("Insufficient Balance");
+		}
+	}
+	
+	public double getbalance()
+	{
+		return balance;
+	}
+	
+	@Override
+	public String toString() {
+		return "Name: " + name + ", Id: " + acc_num + ", Balance: " + balance +"Type:"+this.getClass();
+	}
+}
diff --git a/ConfirmDialog b/ConfirmDialog
new file mode 100644
index 0000000..da8d57e
--- /dev/null
+++ b/ConfirmDialog
@@ -0,0 +1,11 @@
+
+    public static boolean confirmAction(String message, String title) {
+        int response = JOptionPane.showConfirmDialog(
+                null,
+                message,
+                title,
+                JOptionPane.YES_NO_OPTION,
+                JOptionPane.QUESTION_MESSAGE
+        );
+        return response == JOptionPane.YES_OPTION;
+    }
diff --git a/Exceptions in BankAccount.java b/Exceptions in BankAccount.java
new file mode 100644
index 0000000..ff696fd
--- /dev/null
+++ b/Exceptions in BankAccount.java	
@@ -0,0 +1,63 @@
+package Bank;Add commentMore actions
+import java.io.Serializable;
+
+import Exceptions.InvalidAmount;
+import Exceptions.MaxBalance;
+import Exceptions.MaxWithdraw;
+
+public class BankAccount implements Serializable {
+
+	/**
+	 * 
+	 */
+	private static final long serialVersionUID = 1L;
+	private String name;
+	private double balance;
+	protected double min_balance;
+	String acc_num;
+	//String type;
+	
+	
+	public BankAccount(String name, double balance, double min_balance) throws Exception {
+    if (balance < min_balance) {
+        throw new Exception("Initial balance cannot be less than the minimum required balance: " + min_balance);
+    }
+    this.name = name;
+    this.balance = balance;
+    this.min_balance = min_balance;
+    this.acc_num = 10000 + (int) (Math.random() * 89999) + "";
+}
+
+
+	public void deposit(double amount) throws InvalidAmount
+	{
+		if (amount <= 0){
+			throw new InvalidAmount("Deposit amount must be greater than zero.");
+		}
+		balance+=amount;
+	}
+	
+	public void withdraw(double amount) throws MaxWithdraw, MaxBalance
+	{
+		if((balance-amount)>=min_balance && amount<balance)
+		{
+			balance-=amount;
+			
+		}
+		
+		else
+		{
+			throw new MaxBalance("Insufficient Balance");
+		}
+	}
+	
+	public double getbalance()
+	{
+		return balance;
+	}
+	
+	@Override
+	public String toString() {
+		return "Name: " + name + ", Id: " + acc_num + ", Balance: " + balance +"Type:"+this.getClass();
+	}
+}
diff --git a/RemoveAccount class b/RemoveAccount class
new file mode 100644
index 0000000..62eaeb8
--- /dev/null
+++ b/RemoveAccount class	
@@ -0,0 +1,30 @@
+package Bank;
+
+import Data.FileIO;
+
+public class RemoveAccount {
+
+    public static boolean removeAccount(String accNumToRemove) {
+        FileIO.Read(); // data dosyasından Bank objesini oku
+        BankAccount[] accounts = FileIO.bank.getAccounts();
+        boolean removed = false;
+
+        for (int i = 0; i < accounts.length; i++) {
+            if (accounts[i] != null && accounts[i].getAccNum().equals(accNumToRemove)) {
+                accounts[i] = null; // Diziden sil
+                removed = true;
+                break;
+            }
+        }
+
+        if (removed) {
+            FileIO.bank.setAccounts(accounts); // diziyi geri ata
+            FileIO.Write(); // data dosyasına yaz
+            System.out.println("Account " + accNumToRemove + " removed successfully.");
+        } else {
+            System.out.println("Account " + accNumToRemove + " not found.");
+        }
+
+        return removed;
+    }
+}
diff --git a/UserConfirmation b/UserConfirmation
new file mode 100644
index 0000000..11aa508
--- /dev/null
+++ b/UserConfirmation
@@ -0,0 +1,10 @@
+public static boolean confirmAction(String message, String title) {Add commentMore actions
+        int response = JOptionPane.showConfirmDialog(
+                null,
+                message,
+                title,
+                JOptionPane.YES_NO_OPTION,
+                JOptionPane.QUESTION_MESSAGE
+        );
+        return response == JOptionPane.YES_OPTION;
+    }
diff --git a/lib/json-20210307.jar b/lib/json-20210307.jar
new file mode 100644
index 0000000..6583ea5
Binary files /dev/null and b/lib/json-20210307.jar differ
diff --git a/src/Bank/BankAccount.java b/src/Bank/BankAccount.java
index d27fd7e..e2656d6 100644
--- a/src/Bank/BankAccount.java
+++ b/src/Bank/BankAccount.java
@@ -1,6 +1,7 @@
 package Bank;
 import java.io.Serializable;
 
+import Exceptions.InvalidAmount;
 import Exceptions.MaxBalance;
 import Exceptions.MaxWithdraw;
 
@@ -59,4 +60,9 @@ public double getbalance()
 	public String toString() {
 		return "Name: " + name + ", Id: " + acc_num + ", Balance: " + balance +"Type:"+this.getClass();
 	}
+
+	public String getAccNum() {
+    return acc_num;
+}
+
 }
diff --git a/src/Bank/ExchangeRate.java b/src/Bank/ExchangeRate.java
new file mode 100644
index 0000000..54163cb
--- /dev/null
+++ b/src/Bank/ExchangeRate.java
@@ -0,0 +1,48 @@
+package Bank;
+
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.URI;
+import java.net.URL;
+import org.json.JSONObject;
+
+public class ExchangeRate {
+
+    public static double getUSDExchangeRate() {
+        return fetchRate("USD");
+    }
+
+    public static double getEURExchangeRate() {
+        return fetchRate("EUR");
+    }
+
+    private static double fetchRate(String currency) {
+        try {
+            String urlStr = "https://api.frankfurter.app/latest?from=TRY&to=USD,EUR";
+            URI uri = URI.create(urlStr);
+            URL url = uri.toURL();
+            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
+            conn.setRequestMethod("GET");
+
+            BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
+            StringBuilder response = new StringBuilder();
+            String line;
+
+            while ((line = reader.readLine()) != null) {
+                response.append(line);
+            }
+
+            reader.close();
+
+            JSONObject json = new JSONObject(response.toString());
+            JSONObject rates = json.getJSONObject("rates");
+
+            return rates.getDouble(currency);
+
+        } catch (Exception e) {
+            System.out.println("Kur bilgisi alınamadı: " + e.getMessage());
+            return -1;
+        }
+    }
+}
diff --git a/src/Bank/RemoveAccount.java b/src/Bank/RemoveAccount.java
new file mode 100644
index 0000000..7c80ed6
--- /dev/null
+++ b/src/Bank/RemoveAccount.java
@@ -0,0 +1,30 @@
+package Bank;
+
+import Data.FileIO;
+
+public class RemoveAccount {
+
+    public static boolean removeAccount(String accNumToRemove) {
+        FileIO.Read(); // data dosyasından Bank objesini oku
+        BankAccount[] accounts = FileIO.bank.getAccounts();
+        boolean removed = false;
+
+        for (int i = 0; i < accounts.length; i++) {
+            if (accounts[i] != null && accounts[i].getAccNum().equals(accNumToRemove)) {
+                accounts[i] = null; // Diziden sil
+                removed = true;
+                break;
+            }
+        }
+
+        if (removed) {
+            FileIO.bank.setAccounts(accounts); // diziyi geri ata
+            FileIO.Write(); // data dosyasına yaz
+            System.out.println("Account " + accNumToRemove + " removed successfully.");
+        } else {
+            System.out.println("Account " + accNumToRemove + " not found.");
+        }
+
+        return removed;
+    }
+}
\ No newline at end of file