Question

对于我的Java类简介，我应该创建一个摩尔斯电码翻译器，可以将英语翻译成莫尔斯语，也可以翻译成莫尔斯语。我的代码适用于将英语转换为莫尔斯语，但似乎无法实现其他方式，从摩尔斯电码到英语。这是提示：

该项目涉及编写一个程序，将摩尔斯电码翻译成英文和英语到莫尔斯电码。您的程序将提示用户指定所需的翻译类型，输入一串莫尔斯电码字符或英文字符，然后显示翻译的结果。输入摩尔斯电码时，用一个空格分隔每个字母/数字，和用“|”分隔多个单词。例如， - --- | - ......将是莫尔斯句子“是”的代码输入。您的程序只需要处理一个句子并且可以忽略标点符号。输入英语时，用空格分隔每个单词。

我想知道我现在的摩托车代码＆＃34;＆＃34;码。如果您了解出了什么问题，请帮忙。我花了好几个小时试图解决这个问题，并且我已经在2015年8月26日太平洋时间午夜之前完成了这个工作。谢谢！这是我的代码：

//Justin Buckley
//8.26.2015
import java.util.Scanner;
public class MorseCodeProject1 {

    public static void main (String[] args)
    {

        char [] English = { '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 [] Morse = { ".-" , "-..." , "-.-." , "-.." , "." , "..-." , "--." , "...." , ".." , ".---" , "-.-" , ".-.." , "--" , "-." , "---" , ".--." , "--.-" ,  ".-." , "..." , "-" , "..-" , "...-" , ".--" , "-..-" , "-.--" , "--.." , "|" };

        Scanner input = new Scanner (System.in);
        System.out.println( "Please enter \"MC\" if you want to translate Morse Code into English, or \"Eng\" if you want to translate from English into Morse Code" );
        String a = input.nextLine();
            if ( a.equalsIgnoreCase("MC"))
            {
                System.out.println( "Please enter a sentence in Morse Code. Separate each letter/digit with a single space and delimit multiple words with a | ." );
                String b = input.nextLine();

                String[] words = b.split("|");
                for (String word: words )
                {
                    String[] characters = word.split(" ");
                    for (String character: characters) 
                    {
                        if (character.isEmpty()) { continue; }
                        for (int m = 0; m < Morse.length; m++)
                        {
                            if (character.equals(Morse[m]))   
                                System.out.print(English[ m ]);    
                        }    
                    }
                    System.out.print(" ");    
                }    
            }

            else if ( a.contains("Eng" ))
            {
                System.out.println("Please enter a sentence in English, and separate each word with a blank space.");
                String c = input.nextLine(); 

                c = c.toLowerCase ();

                for ( int x = 0; x < English.length; x++ )
                {
                    for ( int y = 0; y < c.length(); y++ )
                    {
                        if ( English [ x ] == c.charAt ( y ) )

                        System.out.print ( Morse [ x ] + " " );


                    }

                }


            }

            else 
            {
                System.out.println ( "Invalid Input" );

            }

        }



}

Answer 1

继续发表评论：在提出这类问题之前，你真的需要做好功课。

所有答案都可以在Java教程中找到：https://docs.oracle.com/javase/tutorial/java/data/strings.html

更具体地说，您想知道如何操作字符串：https://docs.oracle.com/javase/tutorial/java/data/manipstrings.html

这里的教程是一个基本的例子，展示了如何实现你想要的目标：

if ( a.equalsIgnoreCase("MC"))
{
    System.out.println( "Please enter a sentence in Morse Code. Separate each letter/digit with a single space and delimit multiple words with a | ." );
    //Example input string
    String b = ".... . .-.. .-.. --- | .-- --- .-. .-.. -.. | .. -. | -- --- .-. ... ." ;

    //We cant use the split method here because it removes blank spaces, so lets keep it basic:
    //String[] words = b.split("|");
    int letterStart = 0;
    int letterEnd = 0;
    String letter = "";
    while (letterStart < b.length())
    {
        letterEnd = b.indexOf(" ", letterStart);
        //check if end of string has been reached 
        if (letterEnd == -1)
        {
          //grab last morse letter/sequence
          letter = b.substring(letterStart);
        }
        else
        {
          //grab next morse letter/sequence
          letter = b.substring(letterStart, letterEnd);
        }

        //convert each morse sequence to english 
        for (int m = 0; m < Morse.length; m++)
        {
        if (letter.equals("|"))
          {
            //show spaces between words
            System.out.print(" ");
            break;
          }
          else if (letter.equals(Morse[m]))
          {
            //show english letter
            System.out.print(English[m]);
            break;
          }
        }
        if (letterEnd == -1)
        {
        break;
        }
        letterStart = letterEnd+1;
    }
}

需要快速帮助Java Morse Code Translator

1 个答案: