Not Broken

Added 2 popups for Overdrawn, Insufficient
Added disable/ enable buttons

src/main/java/rocks/zipcode/atm/CashMachine.java

@@ -67,7 +67,7 @@ public class CashMachine {
     public String toString() {
 //
         // if (accountData != null){isValidId();}
-        return accountData != null ? accountData.toString() : "Try account 1000, 2000, 6666, 7337\n and click submit.";
+        return accountData != null ? accountData.toString() : "Set Account ID:\n1000\n2000\n6666\n7337";
     }
 
     private <T> void tryCall(Supplier<ActionResult<T> > action, Consumer<T> postAction) {

src/main/java/rocks/zipcode/atm/CashMachineApp.java

@@ -39,21 +39,10 @@ public class CashMachineApp extends Application {
         areaInfo.setMaxSize(250, 160);
 
 
-        Button btnSubmit = new Button("Set Account ID");
-        btnSubmit.setMinSize(250, 40);
-        btnSubmit.setTextFill(blue);
-        btnSubmit.setOnAction(e -> {
-            int id = Integer.parseInt(setAccountIdField.getText());
-            cashMachine.login(id);
-
-            areaInfo.setText(cashMachine.toString());
-        });
-
         Button btnDeposit = new Button("Deposit");
         btnDeposit.setMinSize(250, 40);
         btnDeposit.setTextFill(blue);
-//
-        // btnDeposit.setDisable(true);
+        btnDeposit.setDisable(true);
         btnDeposit.setOnAction(e -> {
             int amount = Integer.parseInt(setDepositField.getText());
             cashMachine.deposit(amount);
@@ -63,6 +52,7 @@ public class CashMachineApp extends Application {
         Button btnWithdraw = new Button("Withdraw");
         btnWithdraw.setMinSize(250, 40);
         btnWithdraw.setTextFill(blue);
+        btnWithdraw.setDisable(true);
         btnWithdraw.setOnAction(e -> {
             int amount = Integer.parseInt(setWithdrawField.getText());
             cashMachine.withdraw(amount);
@@ -73,8 +63,32 @@ public class CashMachineApp extends Application {
         Button btnExit = new Button("Exit");
         btnExit.setMinSize(250, 160);
         btnExit.setTextFill(blue);
+        btnExit.setDisable(true);
         btnExit.setOnAction(e -> {
+            btnDeposit.setDisable(true);
+            btnWithdraw.setDisable(true);
+            btnExit.setDisable(true);
+            resetOnExit();
             cashMachine.exit();
+            areaInfo.setText(cashMachine.toString());
+        });
+
+        Button btnSubmit = new Button("Set Account ID");
+        btnSubmit.setMinSize(250, 40);
+        btnSubmit.setTextFill(blue);
+        btnSubmit.setOnAction(e -> {
+            int id = Integer.parseInt(setAccountIdField.getText());
+            if (isValidId(id)){
+                btnDeposit.setDisable(false);
+                btnWithdraw.setDisable(false);
+                btnExit.setDisable(false);
+            }
+            else {
+                btnDeposit.setDisable(true);
+                btnWithdraw.setDisable(true);
+                btnExit.setDisable(true);
+            }
+            cashMachine.login(id);
 
             areaInfo.setText(cashMachine.toString());
         });
@@ -109,6 +123,12 @@ public class CashMachineApp extends Application {
         }
     }
 
+    public void resetOnExit(){
+        setAccountIdField.clear();
+        setDepositField.clear();
+        setWithdrawField.clear();
+    }
+
     public static void main(String[] args) {
         launch(args);
     }