hashmap.get()返回错误的值，即使它们在地图中都是正确的 [英] hashmap.get() returning wrong values even though they are all correct in the map

问题描述

目标是采用String []长度36，它将是一个从1x1到6x6的6x6数组，然后打印出在2d数组中找到的单词的坐标.很简单.我已经将每个数组项与相应的坐标一起放置在地图中(作为String值，因为我需要返回String).例如，如果我打印所有值，它们将正确打印11到66，但是如果输入是"NO70JE3A4Z28X1GBQKFYLPDVWCSHUTM65R9I"，当我应该获取"1166"时，将得到"1271"作为输出.有任何想法吗?这是我的代码.

Goal is to take in a String[] length 36 and it will be a 6x6 array from 1x1 to 6x6 then print out the coordinates of a word found in the 2d array. Easy enough. I have placed each array item into the map with the corresponding coordinates (as a String value because I need to return a String). If I print all the values they print correctly 11 through 66, but if the input is "NO70JE3A4Z28X1GBQKFYLPDVWCSHUTM65R9I" for example I get "1271" as an output when I should be getting "1166". Any ideas? Here's my code.

     int rcounter = 1;
    int ccounter = 1;
    HashMap<String, String> soup = new HashMap<String, String>();
    for (int i = 0; i < a.length; i++) {
        if (ccounter == 7) {
            ccounter = 1;
            rcounter++;}
        String row = Integer.toString(rcounter);
        String column = Integer.toString(ccounter);
        soup.put(a[i], row + column);
        ccounter++;
        if (i == 36) {
            break; }
            System.out.println(row+column); }


    return soup.get("N") + soup.get("I");

推荐答案

这是我使用的代码(几乎完全复制/粘贴了)，给出了正确的答案:

Here is the code I used (almost exactly copy/pasted) which gives a correct answer:

public class Testtest {

    public static void main(String[] args) {
        char a[] = "NO70JE3A4Z28X1GBQKFYLPDVWCSHUTM65R9I".toCharArray(); // line added to have array "a"

        int rcounter = 1;
        int ccounter = 1;
        Map<String, String> soup = new HashMap<String, String>();
        for (int i = 0; i < a.length; i++) {
            if (ccounter == 7) {
                ccounter = 1;
                rcounter++;}
            String row = Integer.toString(rcounter);
            String column = Integer.toString(ccounter);

            soup.put(new String(""+a[i]), row + column); // line changed to add a String, not a Char, to HashMap
            ccounter++;
            if (i == 36) {
                break;
            }
            System.out.println(row+column);
        }

        System.out.println("result: " + soup.get("N") + soup.get("I")); // changed to display result, rather than return it
    }
}

使用此代码，几乎没有任何更改，并使用您提供的字符串，我得到了正确的结果:

With this code, with almost no changes, and using the String you provided, I get a correct result:

result: 1166

我相信，正如@alfasin所暗示的那样，问题在于您正在初始化char数组a的方式，并且一个寄生虫字符正好出现在字符串的开头

I believe, as hinted by @alfasin, that the problem is in the way you're initialising your char array a, and that one parasite character is appearing at the first place, right at the beginning of the string.

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