java - 将短语中字符的字符串值转换为莫尔斯电码的类

Question

我不明白为什么我能够使用非常相似的循环打印这些字符串值，但它不会像我假设的替换方法那样遍历并替换字母。这是输出: ——但正如您所看到的，本应翻译的短语并未被翻译。我打印彼此对齐的数组和值。输入是重印的(未更改)，尽管它是要调整为莫尔斯电码的字符串值。如果有人能够解释问题所在，我将不胜感激。

.txt 文件中的文本值也如下:

.-
-...
-.-.
-..
.
..-.
--.
....
..
.---
-.-
.-..
--
-.
---
.--.
--.-
.-.
...
-
..-
...-
.--
-..-
-.--
--..
.----
..---
...--
....-
.....
-....
--...
---..
----.
-----

然后是类(class):

import java.util.*;
import java.io.*;
public class MorseCode
{
    public static void main(String []args) throws IOException
    {
        String characters[] = {"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "1", "2", "3", "4", "5", "6", "7", "8", "9", "0"};
        String morseCharacter[] = new String[(characters.length)];

        Scanner in = new Scanner(System.in);
        System.out.println();

        System.out.print("Enter a phrase you wish to translate to morse: ");
        String entry = in.nextLine();

        File fileName1 = new File("morseCode.txt");

        Scanner inFile = new Scanner(fileName1);

        int counter1 = 0;
        while(inFile.hasNextLine() && counter1 < (characters.length))
        {
            morseCharacter[counter1] = inFile.nextLine();
            morseCharacter[counter1] += " ";
            counter1++;
        }

        String result = "";

        for(int x = 0; x < (morseCharacter.length); x++)
        {
            result = entry.replaceAll(characters[x], morseCharacter[x]);
        }

        for(int x = 0; x < (morseCharacter.length); x++)
        {
            System.out.println(characters[x] + " = " + morseCharacter[x]);
        }

        System.out.println(result);
    }
}

Answer 1

您仅应用最后一个字符，因为您始终从条目替换，而不是从之前的结果替换。

试试这个:

    String result = entry;
    //              ^^^^^

    for(int x = 0; x < (morseCharacter.length); x++)
    {
        result = result.replaceAll(characters[x], morseCharacter[x]);
    } //         ^^^^^^