如何将 int[] 转换为 List<Integer>在爪哇? [英] How to convert int[] into List&lt;Integer&gt; in Java?

问题描述

在Java中如何将int[]转换成List?

How do I convert int[] into List<Integer> in Java?

当然，除了逐项循环进行之外，我对任何其他答案都感兴趣.但是，如果没有其他答案，我会选择最能表明此功能不是 Java 一部分的事实.

Of course, I'm interested in any other answer than doing it in a loop, item by item. But if there's no other answer, I'll pick that one as the best to show the fact that this functionality is not part of Java.

推荐答案

从 int[] 转换为 List as 没有捷径Arrays.asList 不处理装箱，只会创建一个 List 这不是你想要的.你必须制定一个实用方法.

There is no shortcut for converting from int[] to List<Integer> as Arrays.asList does not deal with boxing and will just create a List<int[]> which is not what you want. You have to make a utility method.

int[] ints = {1, 2, 3};
List<Integer> intList = new ArrayList<Integer>(ints.length);
for (int i : ints)
{
    intList.add(i);
}

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