如何初始化静态数组?

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

我见过用Java定义静态数组的不同方法。:

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

...or only

…或者只

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

or as a List

或作为一个列表

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

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

有区别吗(当然除了列表定义)?

What is the better way (performance wise)?

什么是更好的方式(表现明智)?

2 个解决方案

#1

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

如果您正在创建一个数组，那么没有区别，但是，以下是更整洁的:

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

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

但是，如果你想将数组传递给一个方法你必须这样调用它:

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

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

#2

Nope, no difference. It's just syntactic sugar. Arrays.asList(..) creates an additional list.

不,没有区别。只是语法糖。aslist(..)创建一个附加的列表。