public class Account {
    private double balance;

    public Account(double balance) {
        this.balance = balance;
    }

    public void withdraw(double amount) throws InsufficientFundsException {
        if (amount > balance) {
            throw new InsufficientFundsException(balance);
        }
        balance -= amount;
        System.out.println("取款成功，当前余额: " + balance);
    }

    public static void main(String[] args) {
        Account account = new Account(1000.0);
        
        try {
            account.withdraw(1500.0);
        } catch (InsufficientFundsException e) {
            System.out.println("取款失败: " + e.getMessage() + "，当前余额: " + e.getBalance());
        }

        try {
            account.withdraw(500.0);
        } catch (InsufficientFundsException e) {
            System.out.println("取款失败: " + e.getMessage() + "，当前余额: " + e.getBalance());
        }
    }
}