键盘布局库中查找特定输入键周边按键（JAVA的preferable） [英] Keyboard Layout library to find Neighboring Keys given an input key (java preferable)

问题描述

有谁知道一个图书馆（preferably JAVA），可以给我钥匙邻国给予美国英语标准键盘键输入？

Does anyone know of a library (preferably java) that can give me neighboring keys given a key input for US_ENGLISH standard keyboard?

例如。如果我输入的字符'D'，我应该得到以下字符返回：[W，E，R，S，F，X，C，V]

E.g. if I input the character 'd', I should get the following characters returned: [w,e,r,s,f,x,c,v].

另外一个网格操作API将工作太（这样我就可以实例化一个QWERTY键盘布局的网格，用它来寻找我的邻居）。

Alternatively a grid manipulation api would work too (so that I can instantiate a grid with a qwerty keyboard layout and use it to find my neighbors).

注1：我现在用的词字符和关键的同义词是指字符

Note 1: I am using the words 'character' and 'key' synonymously to refer to characters.

注2：我知道我可以硬code到50或那么主键映射到他们的邻居的方法。我要寻找一个更好的解决方案。

Note 2: I know I can hard-code a method to map the 50-or-so primary keys to their neighbors. I am looking for a better solution.

感谢你。

推荐答案

我同意BlueNovember，但如果你想要更多的数学解决方案来检查。首先创建角色的网格，然后返回他们都具有从传递...有点儿无用的关键的距离小于2，但它是一个不错的练习：）

I agree with BlueNovember but in case you want a more "mathematical" solution check this. First you create a grid of characters and then you return all of them that has a distance smaller than 2 from the key passed... Kinda useless but it's a nice exercise :)

public class Test {

    static String chars = "qwertyuiopasdfghjkl;zxcvbnm,.";

    public static void main(String[] args) {
        System.out.println(getNeighboringKeys('f'));
        System.out.println(getNeighboringKeys('u'));
        System.out.println(getNeighboringKeys('m'));
        System.out.println(getNeighboringKeys('q'));
    }

    public static String getNeighboringKeys(char key) {
        StringBuffer result = new StringBuffer();
        for (char c : chars.toCharArray()) {
            if (c!=key && distance(c,key)<2) {
                result.append(c);
            }
        }
        return result.toString();
    }

    public static double distance(char c1, char c2) {
        return Math.sqrt(Math.pow(colOf(c2)-colOf(c1),2)+Math.pow(rowOf(c2)-rowOf(c1),2));
    }

    public static int rowOf(char c) {
        return chars.indexOf(c) / 10;
    }

    public static int colOf(char c) {
        return chars.indexOf(c) % 10;
    }
}

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