Java programing bank account code

Question

I am using eclipse to look at my code and the most common error that comes up is "Syntax error on token(s), misplaced construct(s)" I'm not sure what I am doing wrong, but I am fairly new to Java.

My code is supposed to withdraw an indicated (user-input) amount from a bank account, I started off with $10,000 and set up the program so that if the withdrawal amount is less than 0 or greater than $10,000 it will trigger an assertion error.

  class ThreadsUnitProject2 {
public static void main(Sting args [])
// Field member 
private int balance; 

public void BankAccount() 
{ 
balance = 10000; 
} 

public int withdraw(int amount) 
{   
// Subtract requested amount from balance 
balance-=amount; 

// Return requested amount 
return amount; 
} 


public int getBalance() 
{ 
return balance; 
} 


import java.util.Scanner; 

class BankAccountTester extends BankAccount
{ 
public static void main(String[] args) 
{ 
    Scanner scan = new Scanner(System.in); 

    BankAccount myAccount = new BankAccount(); 

    System.out.println("Balance = " + myAccount.getBalance()); 

    System.out.print("Enter amount to be withdrawn: "); 
int amount = scan.nextInt(); 

    assert (amount >= 0 && amount <= myAccount.getBalance()):"You can't withdraw that amount!"; 

    myAccount.withdraw(amount); 

    System.out.println("Balance = " + myAccount.getBalance()); 
}

Thank you for all of your help!

move your `import java.util.Scanner;` to the top of the file. — Daniel Gabriel, Dec 14 '13 at 00:28
`public static void main(Sting args [])` This needs brackets. Amongst other stuff. — Jeroen Vannevel, Dec 14 '13 at 00:28
You should fix your indentation when you submit so that it's easier for people to read. Also, you appear to have two `main` methods? — AAA, Dec 14 '13 at 00:29
Another issue is that you don't have a constructor for your `ThreadsUnitProject2` class. Which means balance is never going to be set to 10000. — Tdorno, Dec 14 '13 at 00:30

score 0 · Answer 1 · answered Dec 14 '13 at 00:32

0

rename your class "ThreadsUnitProject2" to BankAccount and remove main() method from that and make BankAccountTester class public and finally remove void from BankAccount constructor

answered Dec 14 '13 at 00:32

Ashish

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Tdorno · Answer 2 · 2013-12-14T00:41:13.490

After seeing so many issues in your code I decided I should just fix it and let you try to learn from the solution seen below.

This should be the first Class file.

public class BankAccount {

    private int balance;

    public BankAccount() {      //constructor
        balance = 10000;
    }

    public int withdraw(int amount) {
        balance -= amount;
        return amount;
    }

    public int getBalance() {
        return balance;
    }
}

This should be your second Class file. This one will contain your main method which will test your BankAccount class.

import java.util.Scanner;

public class BankAccountTester {
    public static void main(String[] args) {
        Scanner     scan      = new Scanner(System.in);
        BankAccount myAccount = new BankAccount();

        System.out.println("Balance = " + myAccount.getBalance());
        System.out.print  ("Enter amount to be withdrawn: ");
        int amount = scan.nextInt();

        assert (amount >= 0 && amount <= myAccount.getBalance()) : "You can't withdraw that amount!";
        myAccount.withdraw(amount);

        System.out.println("NewBalance = " + myAccount.getBalance());
    }
}

Please read and review this link to proper coding conventions.

Also, assert should not be used for program logic as when deployed they are disabled by default and need to be enabled with the -ea argument. Good explaination here: http://stackoverflow.com/questions/2758224/assertion-in-java — LINEMAN78, Dec 14 '13 at 01:10

Java programing bank account code

2 Answers2