Fs.java

/*
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 */
 
 
/**
 *
 * @author cteam041
 */
import java.util.Scanner;
import java.util.HashMap;
public class Fs {
 
    /**
     * @param args the command line arguments
     */
    static String decode(String cipher,HashMap<String,String> table,HashMap<String,String> table2) {
        String decoded="";
        String morse="";
        int counter=0;
        int[] chars=new int[cipher.length()];
        for(int i=0;i<cipher.length();i++)  {
            String s = "";
            s+=cipher.charAt(i);
            morse+=table.get(s);
            chars[i]=table.get(s).length();
        }
        for(int i=chars.length-1;i>=0;i--)  {
            decoded+=table2.get(morse.substring(counter, counter+chars[i]));
            counter+=chars[i];
        }
        return decoded;
    }
    public static void main(String[] args) {
        HashMap<String,String> charToCode=new HashMap<String,String>();
        charToCode.put("A", ".-");
        charToCode.put("B", "-...");
        charToCode.put("C", "-.-.");
        charToCode.put("D", "-..");
        charToCode.put("E", ".");
        charToCode.put("F", "..-.");
        charToCode.put("G", "--.");
        charToCode.put("H", "....");
        charToCode.put("I", "..");
        charToCode.put("J", ".---");
        charToCode.put("K", "-.-");
        charToCode.put("L", ".-..");
        charToCode.put("M", "--");
        charToCode.put("N", "-.");    
        charToCode.put("O", "---");
        charToCode.put("P", ".--.");
        charToCode.put("Q", "--.-");        
        charToCode.put("R", ".-.");
        charToCode.put("S", "...");
        charToCode.put("T", "-");
        charToCode.put("U", "..-");
        charToCode.put("V", "...-");
        charToCode.put("W", ".--");
        charToCode.put("X", "-..-");
        charToCode.put("Y", "-.--");
        charToCode.put("Z", "--..");
        charToCode.put("_", "..--");
        charToCode.put(",", ".-.-");    
        charToCode.put(".", "---.");
        charToCode.put("?", "----");
        HashMap<String,String> charToCode2=new HashMap<String,String>();
        charToCode2.put(".-","A");
        charToCode2.put("-...","B");
        charToCode2.put("-.-.","C");
        charToCode2.put("-..","D");
        charToCode2.put(".","E");
        charToCode2.put("..-.","F");
        charToCode2.put("--.","G");
        charToCode2.put("....","H");
        charToCode2.put("..","I");
        charToCode2.put(".---","J");
        charToCode2.put("-.-","K");
        charToCode2.put(".-..","L");
        charToCode2.put("--","M");    
        charToCode2.put("-.","N");
        charToCode2.put("---","O");
        charToCode2.put(".--.","P");        
        charToCode2.put("--.-","Q");
        charToCode2.put(".-.","R");
        charToCode2.put("...","S");
        charToCode2.put("-","T");
        charToCode2.put("..-","U");
        charToCode2.put("...-","V");
        charToCode2.put(".--","W");
        charToCode2.put("-..-","X");
        charToCode2.put("-.--","Y");
        charToCode2.put("--..","Z");
        charToCode2.put("..--","_");    
        charToCode2.put(".-.-",",");
        charToCode2.put("---.",".");
        charToCode2.put("----","?");
        Scanner sc=new Scanner(System.in);
        while(true) {
            try{
                String cipher=sc.nextLine();
                System.out.println(decode(cipher,charToCode,charToCode2));
            }   catch(Exception e)  {
                break;
            }
        }
 
 
        // TODO code application logic here
    }
 
}