打印2个具有特定格式的ArrayList [英] Print 2 ArrayLists with specific format

问题描述

我正在尝试格式化程序的输出，因此用户看起来很容易阅读.我不太擅长格式化文本，非常欢迎您的帮助.

I am trying to format the output of my program, so it looks easily readable by the user. I am not that good at formatting text and I would really welcome your help.

我正在尝试打印/显示(在我的JTextArea中).我已经有一种方法可以显示在那里:

I am trying to print/display(in my JTextArea). I already have a method to display there:

public void display(String... lines){
     for(String line:lines){
          System.out.println(line);
     }
}

现在，我有2个ArrayList，它们包含一些通过使用程序添加到其中的数据.

Now, I have the 2 ArrayLists that contain some data which was added to them through the use of the program.

itemOrders = new ArrayList<CafeOrders>();
customers = new ArrayList<CafeCustomer>();

构造函数分别为:

public CafeOrders(String orderID, String itemName, double price){
    super();
    this.orderID = orderID;
    this.itemName = itemName;
    this.price = price;

}

和

public CafeCustomer(int customerID, String customerName){
    super();
    this.customerID = customerID;
    this.customerName = customerName;
    this.orderNo = UUID.randomUUID().toString();

}

我这样做的方式是，orderNo = orderID.
首先询问客户名称，然后当他从项目列表中进行选择时，每个项目都与客户ID一起添加到CafeOrders ArrayList中.

I made it in such a way, that orderNo = orderID.
First the customer name is asked, then when he selects from a list of items, each item is added to the CafeOrders ArrayList along with the customer's ID.

我想创建一个以特定格式或类似格式打印这2个ArrayList的方法:

I want to create a method that prints those 2 ArrayLists in the specific format, or something similar:

customerName "with id" orderID "has purchased" itemName1    
                                               itemName2    
                                               itemName3
                                               etc...

任何帮助将不胜感激！

推荐答案

针对特定格式进行了编辑

向@Shiksha Verma添加额外的代码以仅打印一次客户名称和ID:

Adding extra code to @Shiksha Verma to print the customer name and ID only once:

int x = 0;
for(CafeCustomer customer : customers ){
   for(CafeOrders order: itemOrders ){
       if(customer.getOrderNo.equals(order.getOrderId()) ){
           if(x == 0){
               System.out.println(customer.getCustomerName() +"with Id " + 
               customer.getCustomerId()+ "has purchased: "
               +order.getItemName());
               x = 1;
               continue;
           }  
           System.out.printf("%1$40s",order.getItemName());
       }           
   }
   x = 0;
}

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