Started implumenting a GUI for the program.

src/main/java/me/zacharias/bank/User.java

@@ -1,5 +1,9 @@
 package me.zacharias.bank;
 
+import me.zacharias.bank.transaction.Transaction;
+import me.zacharias.bank.transaction.TransactionType;
+import org.jetbrains.annotations.NotNull;
+
 import java.util.ArrayList;
 import java.util.UUID;
 
@@ -14,14 +18,16 @@ public class User {
         accounts = new ArrayList<>();
     }
     
-    public void createAccount(String name, double balance) {
-        Account account = new BankAccount(name, balance);
+    public UUID createAccount(String name) {
+        Account account = new BankAccount(name);
         accounts.add(account);
+        return account.getId();
     }
     
-    public void createSavingsAccount(String name, double balance) {
-        Account account = new SavingsAccount(name, balance);
+    public UUID createSavingsAccount(String name) {
+        Account account = new SavingsAccount(name);
         accounts.add(account);
+        return account.getId();
     }
 
     public Account getAccount(String name) {
@@ -33,7 +39,7 @@ public class User {
         return null;
     }
 
-    public Account getAccount(UUID id) {
+    public Account getAccount(@NotNull UUID id) {
         for (Account account : accounts) {
             if (account.id.equals(id)) {
                 return account;
@@ -42,17 +48,25 @@ public class User {
         return null;
     }
     
-    public void deleteAccount(Account account) {
+    public void deleteAccount(@NotNull Account account) {
         Account base = null;
         for(Account a : accounts) {
-            if(a instanceof BankAccount) {
+            if(a.getId().equals(account.getId())) {
                 base = a;
             }
         }
         if(base == null) {
-            throw new IllegalArgumentException("No bank accounts found");
+            throw new IllegalArgumentException("No other bank accounts found");
         }
-        base.TransferTransaction(account.getBalance(), "Account closed", account.getId(), base.getId());
+        base.handleTransaction(new Transaction(account.getBalance(), "Account closed", account.getId(), base.getId(), TransactionType.CLOSE));
         accounts.remove(account);
     }
+    
+    public String getName() {
+        return name;
+    }
+    
+    public ArrayList<Account> getAccounts() {
+        return accounts;
+    }
 }