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

问题描述

我希望在 Java 中找到给定元素的索引，知道其内容.

I am looking to find the index of a given element, knowing its contents, in Java.

我尝试了以下示例，但不起作用:

I tried the following example, which does not work:

class masi { 
    public static void main( String[] args ) { 
        char[] list = {'m', 'e', 'y'};

        // should print 1
        System.out.println(list[] == "e");                    
    } 
}

谁能解释一下这有什么问题以及我需要做些什么来解决它?

Can anyone please explain what is wrong with this and what I need to do to fix it?

推荐答案

在这种情况下，您可以从字符数组中创建一个新的 String，然后对该 String 执行 indeoxOf("e") :

In this case, you could create e new String from your array of chars and then do an indeoxOf("e") on that String:

System.out.println(new String(list).indexOf("e")); 

但在其他原始数据类型的情况下，您必须对其进行迭代.

But in other cases of primitive data types, you'll have to iterate over it.

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