Java:打印没有方括号的LinkedList? [英] Java: Printing LinkedList without square brackets?
问题描述
这是一个相当简单的问题。当你打印一个LinkedList时,像这样:
This is a fairly simple question. When you print out a LinkedList, like so:
System.out.println(list);
它打印出来,用方括号括起来,如下:
It prints it out, surrounding the list in square brackets like this:
[thing 1, thing 2, thing 3]
b $ b
有没有方法可以打印出来没有方括号?
Is there a way I can print it out without the square brackets?
推荐答案
并打印它(每个后面带逗号,但最后一个元素)。但是,有一些工具可以帮助:
Yes - iterate the list and print it (with comma after each, but the last element). However, there are utils to help:
Guava :
String result = Joiner.on(", ").join(list);
String result = StringUtils.join(list, ", ");
并且注意:不要依赖 .toString / code>任何对象的方法。它不是用于向用户显示对象,或用作预定义的格式 - 它主要用于调试目的。
And one note: don't rely on the .toString()
method of any object. It is not meant for displaying the object to users, or to be used as a predefined format - it is meant mainly for debugging purposes.
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