请你将private CustomerList customers = new CustomerList(10);改为ArrayList

Sure, here's the updated code:

ArrayList<Customer> customers = new ArrayList<Customer>(10);

By using an ArrayList, we can easily add or remove customers without having to worry about the size of the list. Hope this helps!

相关问题

import java.util.*;public class BankAccountSimulation { public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.print("请输入顾客数量："); int numCustomers = input.nextInt(); // 创建顾客数组 Customer[] customers = new Customer[numCustomers]; for (int i = 0; i < numCustomers; i++) { System.out.printf("请输入顾客%d的汇款次数：", i + 1); int numTransactions = input.nextInt(); System.out.printf("请输入顾客%d每次汇款金额：", i + 1); double amountPerTransaction = input.nextDouble(); customers[i] = new Customer(i + 1, numTransactions, amountPerTransaction); } // 随机安排汇款顺序 List<Customer> customerList = Arrays.asList(customers); Collections.shuffle(customerList); // 模拟汇款 BankAccount bankAccount = new BankAccount(); for (Customer customer : customerList) { for (int i = 0; i < customer.getNumTransactions(); i++) { bankAccount.deposit(customer.getAmountPerTransaction()); } } // 显示总金额 System.out.printf("总金额为：%.2f\n", bankAccount.getBalance()); }}class Customer { private int id; private int numTransactions; private double amountPerTransaction; public Customer(int id, int numTransactions, double amountPerTransaction) { this.id = id; this.numTransactions = numTransactions; this.amountPerTransaction = amountPerTransaction; } public int getId() { return id; } public int getNumTransactions() { return numTransactions; } public double getAmountPerTransaction() { return amountPerTransaction; }}class BankAccount { private double balance; public void deposit(double amount) { balance += amount; } public double getBalance() { return balance; }}在这个代码的基础上显示每次汇款完后的总金额

可以在 BankAccount 类的 deposit 方法里面添加输出语句，表示每次汇款后的总金额。修改后的代码如下：

class BankAccount {
    private double balance;

    public void deposit(double amount) {
        balance += amount;
        System.out.printf("当前总金额为：%.2f\n", balance);
    }

    public double getBalance() {
        return balance;
    }
}

这样，在每次汇款后，都会输出当前的总金额。

public static void read() throws NumberFormatException, IOException //读取文件中的信息 { BufferedReader bufferedreader = new BufferedReader(new FileReader(FILE_NAME)); //创建一个字符流缓冲对象 String line; while ((line = bufferedreader.readLine()) != null) { String[] parts = line.split(","); //将line通过“ ，”分割字符串数组 String Gname = parts[0]; int Gage = Integer.parseInt(parts[1]); int Gphonenumber=Integer.parseInt(parts[2]); String Gsex = parts[3]; String Gadr = parts[4]; String Gsize = parts[5]; //按照顺序，将数组中的读取出来 Guke guke = new Guke(Gname, Gage, Gphonenumber, Gsex, Gadr, Gsize); //将读取出来的通过Guke的构造方法创建类 customerList.add(guke); //将Guke类存进Arraylist中 customerNames.add(Gname); // 将名字存进另一个Arraylist中 } } 使用这个从文件中读取信息，为什么会抛出异常Index 4 out of bounds for length 0

该异常 "Index 4 out of bounds for length 0" 表示你尝试访问一个长度为零的数组中的第五个元素，即 `parts[4]`，这通常是因为你尝试解析的某一行数据没有足够的逗号分隔符来分割成六个部分，导致数组 `parts` 的长度不足 6。

你需要检查文件中的每一行数据，确保每个数据都能按逗号分隔成六部分。如果有任何数据不符合你的格式，你需要进行适当的处理，例如跳过该行或使用默认值来代替缺失的数据。