java - 英语到摩尔斯电码翻译器

Question

该代码应该从英语翻译为摩尔斯电码。一切工作正常，除了在 for 循环中，它只翻译 Message(String A) 的第一个字母。

为什么？

例如，我制作字符串 A="America"...然后它变成“america”(因为 toLowerCase())，但是当它进入 for 循环时，它只会翻译第一个“a”，并且就是这样，就像这样: “.-|||||||”

(a=“.-”)..

我的代码:

import java.util.Scanner;
class MORSE3{
    public static void main(String[] args){
        String A;
        Scanner bola=new Scanner(System.in);
        System.out.println("Introdusca la frase: ");
        A=bola.nextLine();
        int B=A.length();
        int C,X,Y;
        Y=1;
        X=0;
        System.out.println("Traduccion: ");
        String Mor[]={".-","-...","-.-.","-..",".","..-.","--.","....","..",".---","-.-",".-..","--","-..","---",".--.","--.-",".-.","...","-","..-","...-",".--","-..-","-.--","--.."};
        A=A.toLowerCase();//Para hacer las letra minusculas;
        System.out.println(A.charAt(X));
        for(C=0;C<B;C++){
            switch(A.substring(X,Y)){
                case "a":
                System.out.print(Mor[0]+"|");
                X+=1;
                Y+=1;
                    break;
                case "b":
                System.out.print(Mor[1]+"|");
                X+=1;
                Y+=1;
                    break;
                case "c":
                System.out.print(Mor[2]+"|");
                X+=1;
                Y+=1;
                    break;
                case "d":
                System.out.print(Mor[3]+"|");
                X+=1;
                Y+=1;
                    break;
                case "e":
                System.out.print(Mor[4]+"|");
                X+=1;
                Y+=1;
                    break;
                case "f":
                System.out.print(Mor[5]+"|");
                X+=1;
                Y+=1;
                    break;
                case "g":
                System.out.print(Mor[6]+"|");
                X+=1;
                Y+=1;
                    break;
                case "h":
                System.out.print(Mor[7]+"|");
                X+=1;
                Y+=1;
                    break;
                case "i":
                System.out.print(Mor[8]+"|");
                X+=1;
                Y+=1;
                    break;
                case "j":
                System.out.print(Mor[9]+"|");
                X+=1;
                Y+=1;
                break;
                case "k":
                System.out.print(Mor[10]+"|");
                X+=1;
                Y+=1;
                break;
                case "l":
                System.out.print(Mor[11]+"|");
                X+=1;
                Y+=1;
                break;
                case "m":
                System.out.print(Mor[12]+"|");
                X+=1;
                Y+=1;
                break;
                case "n":
                System.out.print(Mor[13]+"|");
                X+=1;
                Y+=1;
                break;
                case "o":
                System.out.print(Mor[14]+"|");
                X+=1;
                Y+=1;
                break;
                case "p":
                System.out.print(Mor[15]+"|");
                X+=1;
                Y+=1;
                break;
                case "q":
                System.out.print(Mor[16]+"|");
                X+=1;
                Y+=1;
                break;
                case "r":
                System.out.print(Mor[17]+"|");
                X+=1;
                Y+=1;
                break;
                case "s":
                System.out.print(Mor[18]+"|");
                X+=1;
                Y+=1;
                break;
                case "t":
                System.out.print(Mor[19]+"|");
                X+=1;
                Y+=1;
                break;
                case "u":
                System.out.print(Mor[20]+"|");
                X+=1;
                Y+=1;
                break;
                case "v":
                System.out.print(Mor[21]+"|");
                X+=1;
                Y+=1;
                break;
                case "w":
                System.out.print(Mor[22]+"|");
                X+=1;
                Y+=1;
                break;
                case "x":
                System.out.print(Mor[23]+"|");
                X+=1;
                Y+=1;
                break;
                case "y":
                System.out.print(Mor[24]+"|");
                X+=1;    
                break;
                case "z":
                System.out.print(Mor[25]+"|");
                X+=1;
                Y+=1;
                break;
                default: 
                System.out.print("|");
                break;

        }
    }
}
}

Answer 1

我不知道你要写什么而不是 Y=Y; 但这没有任何效果(我看不到 Y 是在哪里声明的)。您不需要获取子字符串 - 只需使用输入字符串的字符即可。

注意:如果您使用 'a' - 'a' = 0、'b' - 'a' = 1 属性，您的代码可能会更短> 等(因此 A. charAt(C) - 'a')将帮助您摆脱开关。