通过toString方法来显示不带括号和逗号在一个ArrayList信息 [英] using the toString method to display information in an arraylist without brackets and commas

问题描述

我使用的是toString方法在一个ArrayList中显示的数据。我怎样写的code，使其不显示的信息[，]在我的信息

I am using a toString method to display data in an arraylist. How do I write the code so that it displays the information without the [ , , ] around my information

看到code以下：

case 6:
            System.out.println("Enter an account number to view the transactions of the account");
            number=keyboard.nextLong();
            found=false;
            try{
                for(int i=0;i<aBank.getAccounts().size();i++){

                if(aBank.getAccounts().get(i).getAccountNumber().compareTo(number)==0){
                    found=true;
                    System.out.println("Account " + number + ":\tStart Balance: " +money.format(aBank.getAccounts().get(i).getStartBalance()));
                    System.out.println(aBank.getAccounts().get(i).getTransaction().toString());
                    System.out.println("Ending Balance :" +money.format(aBank.getAccounts().get(i).getBalance()));
                }
                }
            }

        catch (Exception e){
            System.out.println("Unable to process request.\n" +e.getMessage());
        }
            break;

这是输出：

Account 1:  Start Balance: $1000.00
[Deposit    1   6/6/2011    $500.00
, Deposit   2   6/6/2011    $489.00
, Deposit   3   6/6/2011    $262.00
, Withdrawal    4   6/6/2011    $897.00
, Withdrawal    5   6/6/2011    $56.32
, Withdrawal    6   6/6/2011    $78.24
]
Ending Balance :$1219.44

注意，需要删除括号​​和逗号

notice the brackets and commas that need to be removed

推荐答案

在所有不使用的toString（）。它不意味着被用来创建格式化的用户界面的字符串。这是一个开发工具，而不是用户presentation工具。

Don't use toString() at all. It is not meant to be used to create formatted UI strings. It is a developer tool, not a user presentation tool.

我会加警告的情况下重新对象presents用的东西，可以同时服务于目的的简单接受的格式。 Java原始包装（如整数和浮点型）是这样的一个例子。其他简单的类，如2D点可以在这方面的工作，以及，但这很快分崩离析随着一个物体变得更加复杂。

I will add a caveat for the cases where the object represents something with a simple accepted format that can serve both purposes. Java primitive wrappers (like Integer and Float) are an example of this. Other simple classes such as a 2D point can work in this regard as well, but this quickly falls apart as an object becomes more complex.

要你正在尝试什么，只是创建一个方法做你的显示器，做的格式在该方法。

To do what you are attempting, just create a method to do your display and do the formatting in that method instead.

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