首页 \ 问答 \ list.clear（）vs list = new ArrayList （）;(list.clear() vs list = new ArrayList(); [duplicate])

list.clear（）vs list = new ArrayList （）;(list.clear() vs list = new ArrayList(); [duplicate])

 
  这个问题已经在这里有一个答案：  
  
   清空一个ArrayList或者只是创建一个新的，让旧的被垃圾收集？ [复制] 4个答案  
   Map.clear（）vs new Map：哪一个会更好？ [复制] 7个答案  
  
 
 清除ArrayList的2个选项中的哪一个更好，更快，为什么？  
list.clear() 
 
 要么  
list = new ArrayList<Integer>();
 
 事情发生在随机的时候，我必须清除我的ArrayList中的所有条目，并且我无法知道将来会有多少个新条目，可能有0或1000.哪种方法更快更好，为什么？ 

 
 This question already has an answer here: 
  
   Empty an ArrayList or just create a new one and let the old one be garbage collected? [duplicate]  4 answers   
   Map.clear() vs new Map : Which one will be better? [duplicate]  7 answers   
  
 
Which one of the 2 options is better and faster to clear an ArrayList, and why? 
list.clear() 
 
or 
list = new ArrayList<Integer>();
 
It happens that I have to, at random times, clear all entries from my ArrayList and I have no way to know how many new entries there will be in the future, there might be 0 or a 1000. Which method is faster and better, and why?

原文：https://stackoverflow.com/questions/6961356

更新时间：2022-03-29 09:03

最满意答案

 逐点：  
 
  快速解析：二进制（因为你不一定要“解析”，你可以反序列化）  
  添加新事物：文字  
  较小：文本（即使gzip文本大于二进制文件，也不会太大）。  
  可读性：文本  
 
 所以这是三个文本的投票，二进制的一个点。 就个人而言，除了图片（以及其他“自然”二进制数据）以外，我都会使用文本。 然后，将所有内容存储在一个大的zip文件中（我可以想到几个游戏做这个或者接近它的东西）。  
 好读： 纯文本的原文和力量 的重要性 。 

Point by point:  
 
 Fast Parsing: binary (since you don't necessarily have to "parse", you can just deserialize) 
 Adding New Things: text 
 Smaller: text (even if gzipped text is larger than binary, it won't be much larger). 
 Readability: text 
 
So that's three votes for text, one point for binary. Personally, I'd go with text for everything except images (and other data which is "naturally" binary). Then, store everything in a big zip file (I can think of several games do this or something close to it).  
Good reads: The Importance of Being Textual and Power Of Plain Text.

list.clear（）vs list = new ArrayList （）;(list.clear() vs list = new ArrayList(); [duplicate])

最满意答案

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