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BlueJを使用して実行する割り当てがあり、HW4CustomerListというクラスが与えられており、そのためのテキストベースのUIを作成する必要があります。私が作成しなければならないクラスはCustomerTUIと呼ばれ、私の新しいCustomerオブジェクトをArrayListに追加するaddCustomerと呼ばれるメソッドが含まれています。特にこの方法は私がこだわっているものです。クラス仕様では、パラメーターを取得できないとされています（つまり、引数なしのメソッド）。以前の作業では、BlueJの「メソッドボックス」を使用してオブジェクトを操作し、それらをArrayListsに追加しましたが、これがこの特定のインスタンスで使用できるかどうかはわかりません。これまでのCustomerTUIのコードと、CustomerクラスおよびHW4CustomerListクラスのコードを以下に示します。よろしくお願いします。

CustomerTUIクラス：

import java.util.Scanner;

public class CustomerTUI
{
private HW4CustomerList customerList;
private Scanner myScanner;

public CustomerTUI()
{
    customerList = new HW4CustomerList();
    myScanner = new Scanner(System.in);
}

public void menu()
{
    int command;
    boolean running = true;

    while(running)
    {
        displayMenu();
        command = getCommand();
        execute(command);
    }
}

private void addCustomer()
{
    customerList.addCustomer();
}

private void displayMenu()
{
    System.out.println("            CustomerList program         ");
    System.out.println("=========================================");
    System.out.println("|Add a customer to the list..........[1]|");
    System.out.println("|Get number of customers.............[2]|");
    System.out.println("|Remove a customer from the list.....[3]|");
    System.out.println("|Show all customer details...........[4]|");
    System.out.println("|Show a specific customers details...[5]|");
    System.out.println("|Quit................................[6]|");
    System.out.println("=========================================");
}

private void execute(int command)
{
    if(command == 1)
    {
        addCustomer();
    }

    else if(command == 2)
    {
        getNumberOfCustomers();
    }

    else if(command == 3)
    {
        removeCustomer();
    }

    else if(command == 4)
    {
        showAllCustomers();
    }

    else if(command == 5)
    {
        showCustomer();
    }

    else if(command == 6)
    {
        quitCommand();
    }

    else
    {
        unknownCommand(command);
    }
}

private int getCommand()
{
    System.out.println("Enter the command of the function you wish to use: ");
    int command = myScanner.nextInt();
    return command;
}

private void getNumberOfCustomers()
{
    if(customerList.getNumberOfCustomers() == 1)
    {
        System.out.println("We have " + customerList.getNumberOfCustomers() + " customer.");
    }
    else
    {
        System.out.println("We have " + customerList.getNumberOfCustomers() + " customers.");
    }
}

private void quitCommand()
{
    System.out.println("The program is now closing down...");
    System.exit(0);
}

private void removeCustomer()
{
    String accNo;

    System.out.println("Enter the account number of the customer you wish to remove: ");
    accNo = myScanner.next();
    if (customerList.removeCustomer(accNo) == true)
    {
        System.out.println("Customer with account number " + accNo + " was successfully removed.");
    }
    else
    {
        System.out.println("Customer with account number " + accNo + " was NOT successfully removed.");
        System.out.println("Please try again.");
    }
}

private void showAllCustomers()
{
    customerList.getAllCustomers();
}

private void showCustomer()
{
    String accNo;

    System.out.println("Enter the account number of the customer you wish to view: ");
    accNo = myScanner.next();
    if(customerList.getCustomer(accNo) == false)
    {
        System.out.println("Could not find customer with account number " + accNo + ".");
    }
    else
    {
        return;
    }
}

private void unknownCommand(int command)
{
    System.out.println("Command number " + command + " is not valid. Please try again.");
}
}

HW4CustomerListクラス：

import java.util.*;

public class HW4CustomerList
{
private ArrayList<Customer> customers;    

public HW4CustomerList()
{
   customers = new ArrayList<Customer>();
}

public void addCustomer(Customer customer)
{
    customers.add(customer);
}

public int getNumberOfCustomers()
{
    return customers.size();
}

public boolean getCustomer(String accountNumber)
{
   for(Customer customer : customers)
   {
       if(accountNumber.equals(customer.getAccountNumber()))
       {
          customer.printCustomerDetails();
          return true;
      }
  }
  return false;
}


public void getAllCustomers()
{
    for(Customer customer : customers)
    {
        customer.printCustomerDetails();
        System.out.println("\n");
    }
}


public boolean removeCustomer(String accountNumber)
{
     int index = 0;
     for (Customer customer: customers)
     {
          if (accountNumber.equals(customer.getAccountNumber()))
        {
            customers.remove(index);
            return true;
        }
        index++;
    }
    return false;
}
}
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1 に答える 1

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addCustomer（）メソッドで新しいCustomerオブジェクトを作成するだけでよいと思います。これには、おそらく追加の詳細を取得する必要があります。

public void addCustomer()
{
    Scanner scanner = new Scanner(System.in);
    System.out.println("Enter customer name: ");
    String name = scanner.nextLine();
    //any additional details
    Customer customer = new Customer(name, otherParams);
    customers.add(customer);
}

お役に立てば幸いです。

于 2012-11-26T15:26:22.537 に答える