Java，如何比较字符串和字符串数组 [英] Java, how to compare Strings with String Arrays

问题描述

我在这里搜索了一段时间，但一直没有找到答案.

I have been searching here for some time but haven't been able to find the answer to it.

我基本上被要求使用一个数组来完成大学的这项作业.然后我应该检查输入(它也是一个字符串)是否与字符串数组中存储的任何内容相匹配.

I am basically required to use an array for this assignment from college. And then I am supposed to check that the input (which is also a String) matches whatever's stored within the String array.

我知道可以使用 .equals() 方法轻松比较字符串.但是，同样的方法不适用于 String 数组.

I know one can easily compare Strings by using the .equals() method. However, the same method is not working with the String array.

我为 StackOverflow 创建了以下代码示例，以便您可以使用它向我解释(如果您愿意).

I created the following example of code for the purpose of StackOverflow so you can use it to explain it to me, if you'd like.

我做错了什么?

import java.util.Scanner;

class IdiocyCentral {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        /*Prints out the welcome message at the top of the screen*/
        System.out.printf("%55s", "**WELCOME TO IDIOCY CENTRAL**\n");
        System.out.printf("%55s", "=================================\n");

        String [] codes = {"G22", "K13", "I30", "S20"};

        System.out.printf("%5s%5s%5s%5s\n", codes[0], codes[1], codes[2], codes[3]);
        System.out.printf("Enter one of the above!\n");

        String usercode = in.nextLine();

        if (codes.equals(usercode)) {
            System.out.printf("What's the matter with you?\n");
        }
        else {
            System.out.printf("Youda man!");
        }

    }
}

如果之前有人问过这个问题，我很抱歉，我只是错过了，如果是双重问题，我会删除它.

I apologize if this has been asked before and I just missed it, if its a double question, I will remove it.

推荐答案

我想您想检查数组是否包含某个值，是吗?如果是这样，请使用 contains 方法.

I presume you are wanting to check if the array contains a certain value, yes? If so, use the contains method.

if(Arrays.asList(codes).contains(userCode))

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