Java編程的銀行帳戶代碼

Question

我使用eclipse查看我的代碼，出現的最常見錯誤是「令牌上的語法錯誤，錯誤的構造（s）」我不確定我在做什麼錯了，但我對Java相當陌生。

我的代碼應該從銀行賬戶中提取一個指定的（用戶輸入）金額，我從$ 10,000開始並設置程序，以便如果提款金額小於0或大於$ 10,000，它將觸發一個斷言錯誤。

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    System.out.print("Enter amount to be withdrawn: "); 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()); 
} 

謝謝你的幫助！

Answer 1

類「ThreadsUnitProject2」重命名的BankAccount，並從該刪除main（）方法，使BankAccountTester類公共終於從的BankAccount構造

Answer 2

刪除無效在代碼中看到這麼多的問題後，我決定，我應該只是修復它讓你嘗試從下面的解決方案中學習。

這應該是第一個Class文件。

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; 
    } 
} 

這應該是您的第二個Class文件。這將包含您的main方法，它將測試您的BankAccount類。

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     System.out.print ("Enter amount to be withdrawn: "); 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()); 
    } 
} 

請閱讀並複習this link to proper coding conventions。