LeetCode-804 Unique Morse Code Words Solution (with Java)

1. Description:

Notes:

2. Examples:

3.Solutions:

/**
 * Created by sheepcore on 2019-02-24
 */
class Solution {
    public int uniqueMorseRepresentations(String[] strs) {
        char ch;  //current char of eace word
        String morse = "";  //morsecode for each word
        Set morseSet = new HashSet(); //used for containing morsecodes
        final String[] morsecode = { ".-", "-...", "-.-.", "-..", ".", "..-.", "--.", "....", "..", ".---", "-.-",
                                     ".-..", "--", "-.", "---", ".--.", "--.-", ".-.", "...",  "-", "..-", "...-", 
                                     ".--", "-..-", "-.--","--.." };
        int i;
        for (i = 0; i < strs.length; i++) {
            for (int j = 0; j < strs[i].length(); j++) {
                ch = strs[i].charAt(j);
                morse += morsecode[ch - 'a'];
            }
            morseSet.add(morse);
            morse = "";
        }
        return morseSet.size();
    }
}