added a check to withdraw only whats available in balance

data/save.txt

@@ -1 +1 @@
-jen;900.0
+jen;0.0

src/main/java/seedu/bankwithus/BankWithUs.java

@@ -98,6 +98,7 @@ public static void main(String[] args) {
         try {
             new BankWithUs(FILE_PATH).run();
         } catch (IOException e) {
+            return;
         }
     }
 }

src/main/java/seedu/bankwithus/Parser.java

@@ -13,6 +13,13 @@ public Parser(BankWithUs bwu) {
         this.bwu = bwu;
     }
 
+    public float parseWithdrawAmt(String args) {
+        float withdrawAmt = Float.parseFloat(args);
+        float currBal = bwu.accounts.accounts.get(0).balance;
+        float final_bal = currBal-withdrawAmt;
+        return final_bal;
+    }
+
     /**
      * Parses the user input into command and arguments.
      */
@@ -32,18 +39,22 @@ public void parseUserInput(String input) throws CommandNotFoundException {
                 screen.viewAccount(accDetails);
                 break;
             case "withdraw":
-                float withdrawAmt = Float.parseFloat(args);
-                float currBal = bwu.accounts.accounts.get(0).balance;
-                float final_bal = currBal-withdrawAmt;
-                bwu.accounts.accounts.get(0).setBalance(final_bal);
-                System.out.println("u have $" + String.valueOf(final_bal) + " remaining!");
+                float final_bal = parseWithdrawAmt(args);
+                if(final_bal > -1) {
+                    bwu.accounts.accounts.get(0).setBalance(final_bal);
+                    screen.showBal(final_bal);
+                } else {
+                    System.out.println("You do not have sufficient Balance");
+                }
                 break;
             default:
                 throw new CommandNotFoundException();
         }
 
     }
 
+
+
     /**
      * This method reads any existing file and add the saved data
      * into current programme

src/main/java/seedu/bankwithus/Ui.java

@@ -40,7 +40,7 @@ public void createScanner() {
 
     /**
      * Gets the next line of user input
-     * 
+     *
      * @return the next of user input
      */
 
@@ -56,14 +56,20 @@ public void closeScanner() {
         this.scanner.close();
     }
 
+    public void printLine() {
+        System.out.println("----------------------------");
+    }
+
     public void viewAccount(String accDetails) {
         String name = accDetails.split(";")[0];
         String bal = accDetails.split(";")[1];
-        System.out.println("----------------------------");
+        printLine();
         System.out.println("Name: " + name);
-        System.out.println("Balance: $"+bal);
-        System.out.println("----------------------------");
+        System.out.println("Balance: $" + bal);
+        printLine();
     }
-}
-
 
+    public void showBal(float finalBal) {
+        System.out.println("You have $" + String.valueOf(finalBal) + " remaining!");
+    }
+}

src/test/java/seedu/bankwithus/StorageTest.java

@@ -2,8 +2,6 @@
 
 import org.junit.jupiter.api.Test;
 
-import java.util.Scanner;
-
 import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
 
 public class StorageTest {

text-ui-test/data/save.txt

@@ -0,0 +1 @@
+june;1000.0