Arrays.asList() 不能正常工作? [英] Arrays.asList() not working as it should?

问题描述

我有一个 float[]，我想得到一个具有相同元素的列表.我可以做一件一件一件很丑的事情，但我想使用 Arrays.asList 方法.但是有一个问题.这有效:

I have a float[] and i would like to get a list with the same elements. I could do the ugly thing of adding them one by one but i wanted to use the Arrays.asList method. There is a problem though. This works:

List<Integer> list = Arrays.asList(1,2,3,4,5);

但这不是.

int[] ints = new int[] {1,2,3,4,5};
List<Integer> list = Arrays.asList(ints);

asList 方法接受一个 varargs 参数，据我所知，它是数组的简写".

The asList method accepts a varargs parameter which to the extends of my knowledge is a "shorthand" for an array.

问题:

• 为什么第二段代码返回的是 List 而不是 List.

有办法改正吗?

为什么自动装箱在这里不起作用；即 int[] 到 Integer[]?

Why doesn't autoboxing work here; i.e. int[] to Integer[]?

推荐答案

这个怎么样?

Integer[] ints = new Integer[] {1,2,3,4,5};
List<Integer> list = Arrays.asList(ints);

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