该代码假设从英语翻译为摩尔斯电码。一切正常，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，我创建字符串A =＆＃34; America＆＃34; ...然后它变为＆＃34;美国＆＃34;（因为toLowerCase（））但是当它进入for循环时，它只会翻译第一个＆＃34; a＆＃34;以及它，就像这样： ＆＃34; .- |||||||＆＃34;
(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;
}
}
}
}
答案 0 :(得分：4)
我不知道你写的是什么而不是Y=Y;，但这没有任何影响（我不知道Y在哪里宣布）。您不需要使用子字符串 - 只需使用输入字符串的字符。
注意：如果您使用'a' - 'a' = 0，'b' - 'a' = 1等属性，您的代码可能会更短（因此A. charAt(C) - ＆＃39; a＆＃39;）将帮助你摆脱开关。
答案 1 :(得分：0)
问题出在这一行：
switch(A.substring(X,Y)){
var X从零开始：
X=0;
然后您将X增加X自己，这将使X等于零，因为0+0=0：
X+=X;
你应该以某种方式使用var C作为索引迭代所有字符。在C的通话中使用A.substring(...)。
答案 2 :(得分：0)
如果你需要，可以使用莫尔斯代码翻译器。
import java.util.Scanner;
公共课测试{
/**
* @param args
*/
public static void main(String[] args) {
System.out.println("Enter Text For Conversion to Morse Code");
Scanner scan = new Scanner(System.in);
String s = scan.nextLine();
System.out.println(print(toMorse(s)));
}
static boolean[] toMorse(String input) {
boolean output[] = new boolean[0];
for (int i = 0; i < input.length(); i++) { // Every character
char onChar = input.charAt(i);
output = addCharacter(output, onChar);
}
return output;
}
static boolean[] addCharacter(boolean[] input, char character) {
character = Character.toLowerCase(character);
if (character == 'a') {
input = dot(input);
input = dash(input);
}
if (character == 'b') {
input = dash(input);
input = dot(input);
input = dot(input);
input = dot(input);
}
if (character == 'c') {
input = dash(input);
input = dot(input);
input = dash(input);
input = dot(input);
}
if (character == 'd') {
input = dash(input);
input = dot(input);
input = dot(input);
}
if (character == 'e') {
input = dot(input);
}
if (character == 'f') {
input = dot(input);
input = dot(input);
input = dash(input);
input = dot(input);
}
if (character == 'g') {
input = dash(input);
input = dash(input);
input = dot(input);
}
if (character == 'h') {
input = dot(input);
input = dot(input);
input = dot(input);
input = dot(input);
}
if (character == 'i') {
input = dot(input);
input = dot(input);
}
if (character == 'j') {
input = dot(input);
input = dash(input);
input = dash(input);
input = dash(input);
}
if (character == 'k') {
input = dash(input);
input = dot(input);
input = dash(input);
}
if (character == 'l') {
input = dot(input);
input = dash(input);
input = dot(input);
input = dot(input);
}
if (character == 'm') {
input = dash(input);
input = dash(input);
}
if (character == 'n') {
input = dash(input);
input = dot(input);
}
if (character == 'o') {
input = dash(input);
input = dash(input);
input = dash(input);
}
if (character == 'p') {
input = dot(input);
input = dash(input);
input = dash(input);
input = dot(input);
}
if (character == 'q') {
input = dash(input);
input = dash(input);
input = dot(input);
input = dash(input);
}
if (character == 'r') {
input = dot(input);
input = dash(input);
input = dot(input);
}
if (character == 's') {
input = dot(input);
input = dot(input);
input = dot(input);
}
if (character == 't') {
input = dash(input);
}
if (character == 'u') {
input = dot(input);
input = dot(input);
input = dash(input);
}
if (character == 'v') {
input = dot(input);
input = dot(input);
input = dot(input);
input = dash(input);
}
if (character == 'w') {
input = dot(input);
input = dash(input);
input = dash(input);
}
if (character == 'x') {
input = dash(input);
input = dot(input);
input = dot(input);
input = dash(input);
}
if (character == 'y') {
input = dash(input);
input = dot(input);
input = dash(input);
input = dash(input);
}
if (character == 'z') {
input = dash(input);
input = dash(input);
input = dot(input);
input = dot(input);
}
if (character == ' ') {
input = add(input, false);
input = add(input, false);
input = add(input, false);
input = add(input, false);
}
if (character == '1') {
input = dot(input);
input = dash(input);
input = dash(input);
input = dash(input);
input = dash(input);
}
if (character == '2') {
input = dot(input);
input = dot(input);
input = dash(input);
input = dash(input);
input = dash(input);
}
if (character == '3') {
input = dot(input);
input = dot(input);
input = dot(input);
input = dash(input);
input = dash(input);
}
if (character == '4') {
input = dot(input);
input = dot(input);
input = dot(input);
input = dot(input);
input = dash(input);
}
if (character == '5') {
input = dot(input);
input = dot(input);
input = dot(input);
input = dot(input);
input = dot(input);
}
if (character == '6') {
input = dash(input);
input = dot(input);
input = dot(input);
input = dot(input);
input = dot(input);
}
if (character == '7') {
input = dash(input);
input = dash(input);
input = dot(input);
input = dot(input);
input = dot(input);
}
if (character == '8') {
input = dash(input);
input = dash(input);
input = dash(input);
input = dot(input);
input = dot(input);
}
if (character == '9') {
input = dash(input);
input = dash(input);
input = dash(input);
input = dash(input);
input = dot(input);
}
if (character == '0') {
input = dash(input);
input = dash(input);
input = dash(input);
input = dash(input);
input = dash(input);
}
return input;
}
static boolean[] dot(boolean[] input) {
input = add(input, true);
input = add(input, false);
return input;
}
static boolean[] dash(boolean[] input) {
input = add(input, true);
input = add(input, true);
input = add(input, true);
input = add(input, false);
return input;
}
static boolean[] add(boolean[] input, boolean add) {
int length = input.length;
boolean[] newArray = new boolean[length + 1];
for (int i = 0; i < length; i++) {
newArray[i] = input[i];
}
newArray[length] = add;
return newArray;
}
static String print(boolean[] input) {
String output = "";
for (int i = 0; i < input.length; i++) {
if (input[i]) {
output = output + "-";
}
if (!input[i]) {
output = output + " ";
}
}
return output;
}
}