4B-Account

package Balance;
import java.util.Scanner;

public class Account
{
      double curBalance, amt;
      Scanner sc = new Scanner(System.in);
      
      public Account()
      {
          curBalance = 500;
      }
      
      void deposit()
      {
            System.out.println("Enter amount to deposit: ");
            amt = sc.nextDouble();
            curBalance += amt;
            System.out.println("Current Balance is : " + curBalance);
      }
      
      void withdraw()
      {
            System.out.println("Enter amount to withdraw: ");
            amt = sc.nextDouble();
            try
            {
                if(curBalance - amt < 500)
                      throw LessBalanceException(amt);
                curBalance -= amt;
                System.out.println("Availabe balance is : " + curBalance);
            }
            catch(LessBalanceException e)
            {
                System.out.println(e);
            }
      }
      
      void display_balance()
      {
          System.out.println("Available current blance is : " + curBalance);
      }
}


//LessBalanceException class
package Balance;
public LessBalanceException extends Exception
{
    //int amt;
     LessBalanceException(double i)
     {
          System.out.println("Balance is less : " + i);
     }
}


//Class For Main 
package Balance;
import java.util.Scanner;
public class MainProgram
{
   pubilc static void main(String args[])
   {
           double amt;
           int ch; //for choice
           Scanner sc = new Scanner(System.in);

           Account a = new Account();
           String menu = "1. Deposit\n2. Withdraw\n3. Balance\n4. Exit\n5. Exit\n\nEnter your choice: ";
           while(true)
           {
                 System.out.println(menu);
                 ch = sc.nextInt();

                 swtich(ch)
                 {
                      case 1: a.deposit();
                              break;

                      case 2: a.withdraw();
                              break;

                      case 3: a.display_balance();
                              break;

                      case 4: return;

                      default: System.out.println("Invalid Option");
                               break;
                  }
            }
    } 
}