如何初始化静态数组？ [英] How to initialize a static array?

问题描述

我已经看到了不同的方法来定义Java中的静态数组。或者：

I have seen different approaches to define a static array in Java. Either:

String[] suit = new String[] {
  "spades", 
  "hearts", 
  "diamonds", 
  "clubs"  
};

...或者仅

String[] suit = {
  "spades", 
  "hearts", 
  "diamonds", 
  "clubs"  
};

，或作为列表

List suit = Arrays.asList(
  "spades", 
  "hearts", 
  "diamonds", 
  "clubs"  
);

是有区别（除了课程的列表定义）？

Is there a difference (except for the List definition of course)?

什么是更好的方式（性能明智）？

What is the better way (performance wise)?

推荐答案

如果您要创建一个数组，那么有没有什么区别，但是，以下是简洁：

If you are creating an array then there is no difference, however, the following is neater:

String[] suit = {
  "spades", 
  "hearts", 
  "diamonds", 
  "clubs"  
};

但是，如果你想一个数组传递到一个方法，你必须调用它是这样的：

But, if you want to pass an array into a method you have to call it like this:

myMethod(new String[] {"spades", "hearts"});

myMethod({"spades", "hearts"}); //won't compile!

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