Hi.
I'm a student and I need write a programe bank application in java .
I must write a program that the customer could withdraw and deposit from his account.I need a few class?
my professor said me that it's very simple but it's dificullte for me.
you can help me for write it program.

you can help me for write it program.

No.
We can help you understand what the errors are in the program that you write.

I wrote this program,but When I withdraw from my account and again I deposit there isn't balance correct,
you can help me?

import java.util.Scanner;

 

public class BankAccount {

      public static void main(String[] args) {
      Scanner clapton=new Scanner(System.in);
      int x;
      float balance = 0;
      boolean quit=false;
       do {
                 System.out.println("1. Deposit money");
                 System.out.println("2. Withdraw money");
                 System.out.println("3. Check balance");
                 System.out.print(" 0 to quit: "); 
                 System.out.println("enter your choice :");
      x=clapton.nextInt();

     if (x==1) {
        float amount;
        System.out.println(" enter your deposit money :");
        amount=clapton.nextFloat();
        balance =+ amount;
}
else if (x==2) {
        float amount;
        System.out.println(" enter your Withdraw money :");
        amount=clapton.nextFloat();
        balance = -amount;
}
else if (x==3) {
        System.out.println("your balance :" + balance );
}
else if (x==0) {
        quit=true;
}
else {
        System.out.println("wrong choice");
}

}  while (!quit);
        System.out.println("bye");
}
}

what do you mean: isn't correct.

replace
balance = -amount;
balance -= amount;

the same with
balance =+ amount
should be
balance += amount

if you want lesser lines of code: you don't need all those amount variables, you can just put
balance += clapton.nextFloat();

what do you mean: isn't correct.

replace
balance = -amount;
balance -= amount;

the same with
balance =+ amount
should be
balance += amount

if you want lesser lines of code: you don't need all those amount variables, you can just put
balance += clapton.nextFloat();

thanks a lot.

if you need to use classes (OO design) you can create a class
BankAccount
which has an instance variable amount
and has methods:
withDraw which takes a parameter -> amountToWithDraw
deposit -> amountToAdd
checkBalance -> which takes no parameters, but which returns the value in the instance variable amount