类对象在Java中未检测为类

Question

这是我的完整代码，我已经做了重命名之类的事情，但它仍然没有检测到我的对象“atm”。我总是得到这个错误。

C:\Users\USER\Documents\JCreator LE\MyProjects\oreo\src\oreo。java:30:错误：找不到符号系统。出来println（“\n您的储蓄余额现在是：“atm.gbalance”\n”）；

import java.util.Scanner;

public class oreo {
    private static Scanner input = new Scanner(System.in);

    public static void main(String[] args) {
        Account atm = new Account();

        atm.intBalance(0.00);

        boolean atm_status = true;
        while(atm_status) {
            System.out.print("1.Deposit\n");
            System.out.print("\n2.Withdraw");
            System.out.print("\n3.Check Balance");
            System.out.print("\n4.Exit");
            System.out.print("\nOption: ");
            int option = input.nextInt();

            switch(option) {
                case 1:
                    System.out.print("How much would you like to deposit?");
                    double deposit = input.nextDouble();
                    atm.deposit(deposit);
                    break;
                case 2:
                    double withdraw;
                    System.out.print("Your balance is:" + atm.gbalance + "\n");
                    System.out.print("How much would you like to withdraw?" );
                    withdraw= input.nextDouble();
                    System.out.println("\nYour Savings balance is now: " + atm.gbalance + "\n");
                    break;
                case 3:
                    System.out.println("Your current balance is: " + atm.gbalance + "\n");
                    break;
                case 4:
                    atm_status = false;
                    break;
            }
        }
    }
}


class Account {
    double balance;

    void intBalance(double set) {
        balance = set;
    }

    void deposit(double depo) {
        balance +=depo;
    }

    void withdraw(double with){
        balance -=with;
    }

    double gbalance(){
        return balance;
    }    
}

Answer 1

你忘记了括号（）而调用类方法atm.gbalance；

System.out.println("\nYour Savings balance is now: " + atm.gbalance() + "\n");

System.out.println("Your current balance is now: " + atm.gbalance() + "\n");

Answer 2

System.out.println("\nYour Savings balance is now: " + atm.gbalance + "\n"

好吧，要么你想使用可变余额，要么你想使用方法gbalance（）atm。gbalance是错误的，要么是因为键入错误（不包括“g”），要么是因为键入错误，在末尾添加（），将其定义为一种方法。

Answer 3

atm。gbalance是一种方法，而不是帐户类中的变量，因此在访问它时需要括号（）。所以改变这些

atm.gbalance

到

atm.gbalance()