java中的数组初始化 [英] Array initialisation in java

问题描述

顺便说一句，我注意到有人可以写出这样的代码，这很正常:

I noticed one could write code like this, which is perfectly normal, by the way:

int arrays[] = {1, 2, 3};
for (int n : arrays)
   System.out.println(n);

但我不明白以下内容为何是非法的:

But I don't see how the following is illegal:

for (int n : {1, 2, 3})
   System.out.println(n);

从编译器作者的角度来看，这不会引入任何歧义，是吗?可以预期数组的类型与之前声明的元素的类型相同.换句话说，n被声明为int，所以数组必须是int[]

From a compiler writer's point of view, this does not introduce any ambiguity, does it? The type of the array can be expected to be the same type as the element declared previously. In other words, n is declared as int, so the array must be int[]

推荐答案

你需要这样的语法:

for(int n : new int[]{1, 2, 3})
   System.out.println(n);

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