Question

我没有从Eclipse获得错误，但我的控制台输出不是应该的。这是我正在研究的两个班级。

头等舱

public class BankAccount
{
    private double balance;    
    private double interestRate;
    private double interest;   

    public BankAccount(double startBalance, double intRate)
    {
        balance = startBalance;
        interestRate = intRate;
        interest = 0.0;
    }
    public void deposit(double amount)
    {
        balance += amount;
    }

    public void withdraw(double amount)
    {
        balance -= amount;
    }

    public void addInterest()
    {
        interest = balance * interestRate;
        balance += interest;
    }

    public double getBalance()
    {
        return balance;
    }

    public double getInterest()
    {
        return interest;
    }
}

下一课

import java.util.Scanner;    
import java.text.DecimalFormat;

public class Program2
{
    public static void main(String[] args)
    {
        BankAccount account;

        double balance = 500,    
            interestRate = 0.00125, 
            pay = 1000,      
            cashNeeded = 900;  

        Scanner keyboard = new Scanner(System.in);
        DecimalFormat formatter = new DecimalFormat ("#0.00");

        System.out.print("What is your account's starting balance?");
        balance = keyboard.nextDouble();

        System.out.print("What is your monthly interest rate?");
        interestRate = keyboard.nextDouble();

        account = new BankAccount(balance, interestRate);

        System.out.print("How much were you paid this month? ");
        pay = keyboard.nextDouble();

        System.out.println("We will deposit your pay into your account.");
        account.deposit(pay);
        System.out.println("Your current balance is " 
            + formatter.format(account.getBalance()));

        System.out.print("How much would you like to withdraw? ");
        cashNeeded = keyboard.nextDouble();
        account.withdraw(cashNeeded);

        account.getInterest();
        System.out.println("This month you have earned " 
            + formatter.format( account.getInterest() ) 
            + " in interest.");

        System.out.println("Now your balance is " 
            + formatter.format( account.getBalance()));
    }
}

我正在获得的输出：

您的帐户的起始余额是多少？

输出我应该得到：

您的帐户的起始余额是多少？ 500个
  你的月利率是多少？ 0.00125
  你这个月付了多少钱？ 1000
  我们会将您的付款存入您的帐户   您当前的余额是1500.00
  你要退多少钱？ 900个
  本月你的利息为0.75   现在你的余额是600.75左

Answer 1

扫描仪等待输入，直到您提供信息为止，它不会继续前进。

Answer 2

工作得很好。我没有修改你的代码中的任何内容。实际上我正在考虑当程序要求你输入一些内容时，那时你没有给出输入。

在询问 What is your account's starting balance?

时，尝试为示例500提供输入

在Eclipse中没有获得程序的完整输出

2 个答案: