morse

package morse;

import java.util.HashMap;

public class Morse {
    private static final java.util.Map<Character, String> MORSE_MAP;

    static {
        MORSE_MAP = new HashMap<>();
        MORSE_MAP.put('a', ".-");
        MORSE_MAP.put('b', "-...");
        MORSE_MAP.put('c', "-.-.");
        MORSE_MAP.put('d', "-..");
        MORSE_MAP.put('e', ".");
        MORSE_MAP.put('f', "..-.");
        MORSE_MAP.put('g', "--.");
        MORSE_MAP.put('h', "....");
        MORSE_MAP.put('i', "..");
        MORSE_MAP.put('j', ".---");
        MORSE_MAP.put('k', "-.-");
        MORSE_MAP.put('l', ".-..");
        MORSE_MAP.put('m', "--");
        MORSE_MAP.put('n', "-.");
        MORSE_MAP.put('o', "---");
        MORSE_MAP.put('p', ".--.");
        MORSE_MAP.put('q', "--.-");
        MORSE_MAP.put('r', ".-.");
        MORSE_MAP.put('s', "...");
        MORSE_MAP.put('t', "-");
        MORSE_MAP.put('u', "..-");
        MORSE_MAP.put('v', "...-");
        MORSE_MAP.put('w', ".--");
        MORSE_MAP.put('x', "-..-");
        MORSE_MAP.put('y', "-.--");
        MORSE_MAP.put('z', "--..");
        MORSE_MAP.put('1', ".----");
        MORSE_MAP.put('2', "..---");
        MORSE_MAP.put('3', "...--");
        MORSE_MAP.put('4', ".----");
        MORSE_MAP.put('5', ".....");
        MORSE_MAP.put('6', "-....");
        MORSE_MAP.put('7', "--...");
        MORSE_MAP.put('8', "---..");
        MORSE_MAP.put('9', "----.");
        MORSE_MAP.put('0', "-----");
    }

    public static String encode(final String userInput) {
        final StringBuilder morse = new StringBuilder();

        for (int i = 0; i < userInput.length(); i++) {
            if (i != 0) {
                morse.append(' ');
            }
            morse.append(MORSE_MAP.get(userInput.charAt(i)));
        }

        return morse.toString();
    }
}