java - 带文本文件和比较索引的摩尔斯电码

Question

大家。我的摩尔斯电码出现问题。我正在尝试将英文消息或文本(如“A”)转换为莫尔斯电码“.-”

但是，我的转换方法遇到了问题。当我运行我的代码时，我收到了找到的消息，但是，我也收到了我读入的整个莫尔斯电码。

我的老师告诉我我需要比较索引，这样我就可以打印莫尔斯电码的值。但是，我仍然对逻辑抱有疑虑。

这是我到目前为止得到的:

public class MorseCode {

    public static ArrayList<String> alpha;
    public static ArrayList<String> codes;

    /**
    * This Constructor actually imports the list of Morse Code Characters and adds it to an ArrayList.
    */
    public MorseCode() throws IOException
    {
        String token = "";
        Scanner inFile = new Scanner(new File("morsecode.txt"));

        codes = new ArrayList<String>();
        codes.add(".-");
        codes.add("-...");
        codes.add("-.-.");

        while(inFile.hasNext())
        {
            token = inFile.nextLine();
            System.out.println(token);
        }
        inFile.close();
    }

    public static void alpha () throws IOException
    {
        Scanner inFile = new Scanner(new File("alphabet.txt"));
        String cake = "";

        alpha = new ArrayList<String>();
        alpha.add("A");
        alpha.add("B");
        alpha.add("C");

        while(inFile.hasNext())
        {
            cake = inFile.nextLine();
            System.out.println(cake);
        }
        inFile.close();
    }

    public static ArrayList<String> getMorse()//ArrayList<String> codes
    {
        ArrayList codes = new ArrayList<String>();
        return codes;                
    }

    public static ArrayList<String> getAlpha()//ArrayList<String> alpha
    {
        ArrayList alpha = new ArrayList<String>();
        return alpha;
    }

    public static void  Morse ( String token)
    {
        for( String m : codes)
        {
            token = m;
            System.out.println(m);
        }
    }

    public static void Alpha(String cake)
    {
        for( String a : alpha)
        {
            cake = a;

            System.out.println(a);
        }
    }

    public static String convertCode (String myMessage)
    {
        alpha = new ArrayList<String>();
        String myLetter = "";
        String cake = "";
        int myindex = 0;
        for(int index = 0; index < myMessage.length(); index++)
        {
            myLetter = myMessage.substring(index,index + 1);

            for( int in = 0; in < alpha.size(); in++)
            {
                if(alpha.get(in).equals(myLetter))
                {
                    index = in;
                }
                cake += codes.get(in);
                System.out.println(cake);   
            }
        }

        return cake;
    }
}

Answer 1

Doctuer 所说的是真的，您似乎过于频繁地重置值。

这个转换函数应该可以工作，它会返回一个字符串(以莫尔斯电码编码)给定一个正常的英语单词。

    public static String encodeMessage(String message) {

        String encodedMessage = "";

        // Loop through the String
        for(int i = 0; i < message.length(); i++) {

            // Get each Character in String format
            String character = String.valueOf(message.charAt(i));

            // Look for the index of the Character in the Alphabet List
            for(int j = 0; j < alphabet.size(); j++) {

                // If we find a match use the Index to get the corresponding Morse Value
                if(alphabet.get(j).equals(character)) {

                    encodedMessage += code.get(j);

                    // Move onto the next Letter
                    break;
                }
            }
        }

        // Returns only the Encoded Message
        return encodedMessage;
    }
}