Question

无法编译这两个文件以便一起运行。我收到“无法找到或加载主类”错误或“错误的树”错误。从来没有在这里寻求过帮助，希望这有效：）

    package savingsaccount;

    import java.util.Scanner;

    public class SavingsAccount 
    {

public static void main(String[] args) 
{
    double begginingBalance, deposit, withdraw;
    int months;
    double monthlyRate;
    double plus = 0.0;
    double minus = 0.0;

    Scanner keyboard = new Scanner(System.in);

    System.out.println("Please enter the balance at beggining of " +
            "accounting period.");
    begginingBalance = keyboard.nextDouble();

    System.out.println("Please enter number of months in current " +
            "accounting period.");
    months = keyboard.nextInt();

    System.out.println("Enter the annual interest rate.");
    monthlyRate = keyboard.nextDouble();

    a7main accounting = new a7main();

    for(int month = 1; month<=months; month++)
    {
        System.out.println("Enter the amount of deposits for month " +
                month + " : ");
        plus = keyboard.nextDouble();
        accounting.deposits(plus);            

        System.out.println("Enter the amount of withdrawals for" +
                " month " + month + ": ");
        minus = keyboard.nextDouble();
        accounting.withdrawals(minus);

        accounting.interest(monthlyRate);
    }

    System.out.println("The account balance is: " + 
            accounting.getBalance());

    System.out.println("The total amount of deposits is:" + plus);

    System.out.println("The total amount of withdrwals is: " + minus);

    System.out.println("The earned interest is: " + 
            accounting.getRate());

    }

    }

这是一般的文件我试图使用此文件中的方法来计算和保存其他文件中的值。

public class a7main
{
private double totalBalance;
private double interestRate;

public a7main(double balance,double rate)
{
    totalBalance = balance;
    interestRate = rate;
}

public void deposits(double deposit)
{
    totalBalance = totalBalance+deposit;
}

public void withdrawals(double withdraw)
{
    totalBalance = totalBalance-withdraw;
}

public void interest(double rate)
{
    interestRate = totalBalance*rate;
}

public double getBalance()
{
    return totalBalance;
}

public double getRate()
{
    return interestRate;
}
}

Answer 1

@Alex Goad -

在a7main类中添加包名称

您已创建参数化构造函数，并且没有默认构造函数。

a7main accounting = new a7main();

上面一行将查找默认构造函数，如

public a7main(){
}

NetBeans：尝试创建一个类文件以使用另一个程序

1 个答案: