java - 如何修改计算机 Balance() 方法以确保金额​​为正且不含分？

Question

如何修改computeBalance()以确保JTextField中输入的金额为正数(我想我是这样做的)并且没有分？示例:100.19 和 -49.8 Not Acceptable 。

public class ATMbizlogic {

    private double totalBalance;
    private boolean rightPinEntered;



    /**
     * Creates a new instance of ATMbizlogic
     */
    public ATMbizlogic() 
    {
        totalBalance = 0.0;
        rightPinEntered =  true;
    }

    public void computeBalance(double withdraw, double deposit)
    throws ATMexception 
    {
        if(withdraw <=0)
            throw new ATMexception("Negative withdraw not allowed");


        if(deposit <=0)
            throw new ATMexception("Negative deposit not allowed");


         double balance = deposit - withdraw;

        totalBalance = totalBalance + balance;



    }



    public void checkPin(double pin)
    throws ATMexception 
    {
        if(pin <=0)
            throw new ATMexception("Negative pin not allowed");
        if(rightPinEntered == false)
            throw new ATMexception("Can not take another pin");
        if(pin<1111 || pin>9999)
            throw new ATMexception("Enter a valid pin");
        rightPinEntered = true;


    }




    public double getBalance()
    {
        return totalBalance;
    }
}

Answer 1

if(floor(withdraw) != withdraw)
    throw new ATMexception("Withdraw with cents is not allowed.");

if(floor(deposit) != deposit)
    throw new ATMexception("Deposit with cents is not allowed.");

将数字向下舍入并检查它们是否仍然是相同的数字。如果不是，则表示它有小数。