如何在int数组中找到元素的索引？ [英] How to find the index of an element in an int array?

问题描述

如何在 int 类型的Java数组中找到某个值的索引？

How can I find an index of a certain value in a Java array of type int?

I尝试在我的未排序数组上使用 Arrays.binarySearch ，它有时只给出正确的答案。

I tried using Arrays.binarySearch on my unsorted array, it only sometimes gives the correct answer.

推荐答案

Integer[] array = {1,2,3,4,5,6};

Arrays.asList(array).indexOf(4);

请注意，此解决方案是线程安全的，因为它会创建List类型的新对象。

Note that this solution is threadsafe because it creates a new object of type List.

你也不想在循环中或类似的东西中调用它，因为你每次都要创建一个新对象

Also you don't want to invoke this in a loop or something like that since you would be creating a new object every time

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