Java中，如何与字符串数组比较字符串 [英] Java, how to compare Strings with String Arrays

问题描述

我一直在寻找在这里有一段时间了，但一直没能找到它的答案。

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

我基本上需要使用数组从大学这个任务。然后，我应该检查输入（这也是一个String）匹配任何的存储字符串数组中。

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.

我知道有一个可以很容易地通过使用.equals（）方法比较字符串。然而，同样的方法不与字符串数组工作

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

我创建code以下示例计算器的目的，所以你可以用它来解释给我，如果你愿意的话。

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.

我在做什么错了？

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!");
        }

    }
}

我道歉，如果这已经被问过，我只是错过了它，如果它的双重问题，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

I $你是想检查数组包含一定的价值，是p $ psume？如果是这样，使用包含方法。

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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